JP6139230B2 - Boiler steam system salinity monitoring device and monitoring method - Google Patents

Description

  The present invention relates to a boiler steam system salinity monitoring apparatus and monitoring method.

  In the steam system of a thermal power generation boiler, a steam oxidation scale grows on the inner surface of a steam pipe such as a main steam pipe or a reheat steam pipe through which steam passes, and a part of the steam oxidation scale grows with a certain thickness. Separation and scattering may cause troubles such as turbine damage. Therefore, conventionally, these scales are dissolved and removed by chemical cleaning (Patent Document 1).

JP 2004-278861 A

  As with the prior art, scale generation due to aging of the steam system can be removed by chemical cleaning during periodic inspections, but there is no degradation countermeasure due to seawater leaks used in cooling means of the water supply system during boiler operation. there were.

  That is, in the past, when seawater leaks occurred, the deterioration of the components in the steam system or the boiler interior of the boiler was confirmed in a periodic inspection after the seawater leak occurred (for example, about once every two years). It was only to do. Therefore, even if corrosion caused by seawater leaks progressed, there was no confirmation until periodic inspection.

  By the way, during the operation of the boiler unit, the environment of the steam system is oxygen-free and dry, so even if seawater leaks occur, the brought-in seawater components adhere to the surface of the steam piping. Or adhere to the blade surface of the turbine.

  However, during operation of the boiler unit, the inside of the steam pipe is in an oxygen-free state, so that there is almost no corrosion due to seawater components. When the amount of seawater leak is large, the final stage of the low-pressure turbine is drained, which may cause corrosion.

  On the other hand, when the boiler unit is stopped, the generated steam is drained, so that the inside becomes wet. In addition, when the unit is inspected for opening, the inside of the unit is saturated with oxygen due to vacuum break. As a result, the seawater component adhering to each surface is dissolved in the drain. For example, this drain is likely to accumulate at the blade root portion in the boiler cabin, the bent portion of the tube of the steam pipe, the bottom portion, etc., and thus corrosion may be accelerated.

  Further, in the method of extracting a part of the steam from the steam pipe and analyzing the cooled condensed water, since the dry steam is extracted as it is, the salt concentration is not included and the presence or absence of the salt cannot be confirmed.

  Therefore, for example, the appearance of a salinity monitoring device and monitoring method for a boiler steam system that can confirm the presence or absence of salt content inside the steam piping of the steam system even during boiler operation in the situation where seawater leaks occurred in the condensate system Is anxious.

  In view of the above problems, an object of the present invention is to provide a boiler steam system salt content monitoring device and a monitoring method capable of confirming the presence or absence of salt content inside the steam piping of a steam system even during boiler operation. .

The first invention of the present invention for solving the above-described problem is a steam pipe for supplying steam generated in a boiler, provided in parallel with the steam pipe, branched from the steam pipe, and part of the steam. the branch steam passed through, and monitoring for distribution pipe for returning the branch steam to the steam pipe again, during operation of the boiler, as well as and a valve for stopping the flow of part of the branch steam vapor from the steam pipe The monitoring distribution pipe is branched from the steam pipe as part of the steam as branch steam, the branch steam flows again into the steam pipe, and the branch steam is interposed in the branch line. a valve for stopping the flow of the inspection pipe detachable via a detachable flange provided on the branch line, provided with a, during operation of the boiler, the monitoring for content the branch steam A salinity monitoring device for a boiler steam system characterized by passing through a pipe and closing the valve to stop the inflow of branch steam during the operation of the boiler and checking whether or not there is salt adhesion in the monitoring distribution pipe It is in.

According to the first invention, when the salinity is included in the steam flowing through the steam pipe, the salinity is also included in the branch steam passing through the parallel monitoring distribution pipe. By stopping the flow of water and checking for the presence or absence of salt in the monitoring distribution pipe, it becomes possible to indirectly monitor the salinity in the steam pipe. Moreover, by closing the valve interposed in the branch line, the inflow of the branch steam is stopped from flowing into the inspection pipe. Thereafter, the inside of the inspection pipe can be confirmed by removing the inspection pipe from the detachable flange. Moreover, the inside of piping for a test | inspection is wash | cleaned with a washing | cleaning liquid, and the presence or absence of salt content can be confirmed by analyzing a washing | cleaning liquid.

2nd invention is provided in parallel with the steam piping which supplies the vapor | steam which generate | occur | produced in the boiler, and the said steam piping, branches from the said steam piping, lets some branched steam of a steam pass, and is again in the said steam piping A monitoring distribution pipe that returns the branched steam; and a valve that stops inflow of a part of the branched steam from the steam pipe during operation of the boiler, and the monitoring distribution pipe includes the steam pipe. A part of the steam is branched as a branch steam, the branch inspection pipe into which the branch steam flows again into the steam pipe, and the inlet side which is interposed in the branch inspection pipe and stops the inflow of the branch steam. A valve provided on the outlet side, a cleaning liquid supply means for supplying a cleaning liquid from the outside into the branch inspection pipe, and an analysis means for analyzing the cleaning liquid after cleaning, and during the operation of the boiler, the branch steam The passed through a monitored for the distribution pipe, during operation of the boiler, by closing the valve to stop the flow of branch steam boiler steam system, characterized in that to check the presence or absence of salt deposition of the monitoring for distribution pipe The salinity monitoring device.

According to the second invention, by closing the valve interposed in the branch line, the inflow of the branch steam is stopped from flowing into the inspection pipe, and then the cleaning liquid is supplied into the branch inspection pipe to perform the branch inspection. The presence of salt content can be confirmed online by washing the inside of the pipe and analyzing the washing liquid after washing with an analysis means.

A third invention is a salt monitoring method for a boiler steam system for monitoring the presence or absence of salt on the inner surface of a steam pipe for supplying steam from a boiler, and for inspection , wherein a part of the steam pipe is detachable. A monitoring distribution pipe having a pipe is arranged in parallel, and branch steam is always supplied to the monitoring distribution pipe arranged in parallel, and the flow of the branch steam is stopped during the boiler operation, and the monitoring distribution pipe is stopped. after the pipe has cooled, remove the test pipe, in salinity monitoring method of a boiler steam system, wherein should check the presence or absence of adhesion of the internal salt.

According to the third invention, when the salinity is contained in the steam in the steam pipe, the salinity is also contained in the branched steam passing through the parallel monitoring pipes. After stopping the inflow of the branched steam and cooling the monitoring distribution pipe, it is possible to monitor the salinity in the pipe by confirming the presence or absence of salt content in the monitoring distribution pipe. Further, by removing the inspection pipe, the inside of the inspection pipe can be confirmed.

A fourth aspect of the present invention is a salt monitoring method for a boiler steam system for monitoring the presence or absence of salt on the inner surface of a steam pipe for supplying steam from a boiler. A monitoring distribution pipe having a pipe is arranged in parallel, and branch steam is always supplied to the monitoring distribution pipe arranged in parallel, and the flow of the branch steam is stopped during the boiler operation, and the monitoring distribution pipe is stopped. After the piping is cooled, the inspection piping is removed, the cleaning liquid is supplied to the inside, the cleaning liquid is analyzed, the cleaning liquid is analyzed, and the presence or absence of salt content is confirmed. It is in.

According to 4th invention, the inside of piping for a test | inspection is wash | cleaned with a washing | cleaning liquid, and the presence or absence of salt content can be confirmed by analyzing a washing | cleaning liquid.

A fifth aspect of the present invention is a boiler steam system salt monitoring method for monitoring the presence or absence of salt adhesion on the inner surface of a steam pipe for supplying steam from a boiler, wherein a monitoring distribution pipe is arranged in parallel with the steam pipe. The branching steam is always supplied to the monitoring distribution pipe arranged in parallel, and during the operation of the boiler, the branch steam is stopped from flowing, and the monitoring distribution pipe is cooled, and then the monitoring distribution pipe is after washing by supplying externally et wash solution, to analyze the cleaning liquid is salinity monitoring method of a boiler steam system, characterized in that to check the presence or absence of salt deposition of.

According to the fifth aspect , the presence or absence of salt can be confirmed by supplying the cleaning liquid into the inspection pipe, cleaning the inspection pipe, and analyzing the cleaning liquid.

  According to the present invention, when salinity is contained in the steam flowing through the steam pipe, the inside of the monitoring distribution pipe arranged in parallel is provided, so that the salinity is also contained in the branched steam passing through the monitoring distribution pipe. When salinity monitoring is necessary, it is possible to indirectly monitor the salinity in the steam pipe by stopping the inflow of branch steam from the steam pipe and checking for the presence of salt in the monitoring pipe.

FIG. 1 is a schematic diagram of a boiler steam system salt content monitoring apparatus according to a first embodiment. FIG. 2 is a schematic diagram of a boiler steam system salt content monitoring apparatus according to a second embodiment. FIG. 3 is a diagram illustrating an example of a steam system of a thermal power generation boiler.

  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. 3 is a diagram illustrating an example of a steam system of a thermal power generation boiler. In FIG. 3, steam 52 generated by burning fuel in a boiler furnace (hereinafter referred to as “furnace”) 51 provided with a burner 51a is a brackish water separator 53, a boiler steam communication pipe 54, a superheater 55, a main steam pipe. 56 is supplied to high pressure turbine 57. Then, the steam 52 that has worked in the high-pressure turbine 57 is sent to the reheater 59 through the low-temperature reheat steam pipe 58 and heated, and the intermediate-pressure turbine 61 and the low-pressure turbine 62 pass through the high-temperature reheat steam pipe 60. Supplied to do work. Further, the steam 52 that has worked in the low-pressure turbine 62 is cooled by the cooling water (seawater) of the condenser 63 to be the condensate 65, and then the low-pressure feed water heater 66, the deaerator 67, the boiler feed pump P1, It returns to the boiler furnace 51 again through the high-pressure feed water heater 68.

  In the steam system of such a thermal power generation boiler, a steam oxidation scale grows on the inner surface of the main steam pipe 56 or the reheat steam pipes 58 and 60 with the operation for many years, and a part thereof peels off at a certain thickness.・ Spraying may cause troubles such as turbine damage. Therefore, a scale removal measure for dissolving and removing these scales by chemical cleaning is performed in a predetermined periodic inspection.

  In addition to the deterioration due to the change over time, when seawater leaks in the condenser 63 occur, the steam system environment is oxygen-free and dry, so even if seawater leaks occur. The brought-in seawater component adheres to the inner surface of the steam pipe. It also adheres to the blade surface of the turbine. However, during boiler operation, since it is oxygen-free, there is almost no occurrence of corrosion due to seawater components.

  On the other hand, when the boiler is stopped, the generated steam is drained by cooling, so that the inside becomes wet. In addition, during open inspection, oxygen is saturated in the steam pipe due to the destruction of the vacuum. As a result, seawater components adhering to the inner surface of each steam pipe are dissolved in the drain. Since this drain is likely to accumulate at the bent portion of the blade root portion, the bottom portion, etc., corrosion may be accelerated.

  The present invention can grasp the state of seawater leak in the steam unit system that is the cause of this corrosion during boiler operation. Hereinafter, the present invention will be described in detail using Examples 1 and 2.

FIG. 1 is a schematic diagram of a boiler steam system salt content monitoring apparatus according to a first embodiment. As shown in FIG. 1, the salinity monitoring device for a boiler steam system according to the present embodiment is provided in parallel with a steam pipe 13 for supplying steam 52 generated in the boiler, and in parallel with the steam pipe 13, and is branched from the steam pipe 13. The partial distribution steam 21a for passing a part of the steam 52a and returning the branch steam 52a to the steam pipe 13 again, and a part of the steam 52 from the steam pipe 13 during the operation of the boiler. Valves V ₁ and V ₂ for stopping the inflow of 52a are provided. During operation of the boiler 11, the branch steam 52a is passed through the monitoring distribution pipe 21, and the valves V ₁ and V ₂ are operated during operation of the boiler. Is closed to stop the inflow of the branch steam 52a, and the presence or absence of salt content in the monitoring distribution pipe 21 is confirmed.

In FIG. 1, the monitoring distribution pipe 21 includes a branch line 22 in which a part of the steam 52 is branched from the steam pipe 13 as a branch steam 52 a, and the branch steam 52 a flows into the steam pipe 13 again. Inspection pipes which are interposed in the vicinity of the outflow and inflow of the branch steam 52a and which are detachable via valves V ₁ and V ₂ which stop the inflow of the branch steam 52a, and detachable flanges 23a and 23b provided in the branch line 22. 24. In FIG. 1, reference numeral 31 indicates a fastening means for fastening the flanges 23a and 23b.

  The monitoring distribution pipe 21 of the present embodiment has one place on the boiler steam communication pipe 54 shown in FIG. 3, two places on the main steam pipe 56, a low temperature reheat steam pipe 58, a high temperature reheat steam pipe 60, and an intermediate pressure turbine 61. To the low pressure turbine 62 at one location in the steam pipe 69. Two main steam pipes 56 are provided at a plurality of locations because the length of the steam pipe is longer than the others.

Normally, in the condenser 63, when no seawater leak occurs, the steam 52 flowing through the steam pipe 13 does not contain salt. Therefore, the valves V ₁ and V ₂ are opened, a part of the steam 52 a of the steam 52 a is introduced into the branch line 22, passed through the inspection pipe 24, and returned to the steam pipe 13 again. The inside and the inspection pipe 24 have the same conditions. When the steam 52 does not contain salt, the amount of salt (NaCl) is about 0.1 ppm.

  The steam pipe 13 is inspected when seawater leak occurs in the condenser 63. Confirmation of the occurrence of this seawater leak is confirmed by a detection device such as a salinity meter or an electrical conductivity meter installed from the condenser 63, which is the water supply system of the boiler shown in FIG. 3, to the furnace 51.

When this seawater leak is confirmed, during the boiler operation, the valves V ₁ and V ₂ are closed to stop the inflow of the branch steam 52a. Next, after the inspection pipe 24 of the monitoring distribution pipe 21 is cooled, the presence or absence of adhesion of salt in the inspection pipe 24 is confirmed.

  When the salinity is contained in the steam 52 in the steam pipe 13, the salinity is also contained in the branch steam 52 a that passes through the parallel monitoring distribution pipe 21. After stopping the inflow of the branched steam 52a from the steam pipe 13 and cooling the monitoring distribution pipe 21, the inspection pipe 24 of the monitoring distribution pipe 21 is removed from the flanges 23a and 23b. And the salt condition state in piping can be monitored by confirming the presence or absence of the salt adhesion in the piping 24 for test | inspection.

  Moreover, the salt concentration can be measured by washing the inspection pipe 24 with pure water and analyzing the washing liquid.

  As described above, when no seawater leak occurs in the condenser 63, a part of the steam flowing through the steam pipe 13 is always introduced into the monitoring distribution pipe 21 as the branch steam 52a. When the seawater leak including the salt content is generated in the steam 52 flowing through the water, the salt content is also included in the branch steam 52a passing through the parallel monitoring distribution pipe 21.

Therefore, when salt content monitoring is necessary, the valves V ₁ and V ₂ are closed to stop the flow of the branch steam 52a from the steam 52, the inspection pipe 24 of the monitoring distribution pipe 21 is removed from the flanges 23a and 23b, The presence or absence of adhesion of salt in the inspection pipe 24 is confirmed. Thereby, the salt content in the steam pipe 13 can be indirectly monitored.

If there is no abnormality, a new inspection pipe 24 is prepared, attached to the flanges 23a and 23b, the valves V ₁ and V ₂ are opened, and the branched steam 52a is introduced to prepare for the next inspection.

  Here, the inspection pipe 24 is made of the same material as that of the steam pipe 13 and has a diameter of, for example, about 50 mm and about 1/10 of the steam pipe (diameter: 400 to 500 mm). Moreover, the length is about 200-500 mm, for example.

On the other hand, in the inspection pipe 24, when the adhesion of salt is confirmed and it is judged that there is an influence of the seawater leak of the condenser 63, the central controller is notified, an alarm is issued, and the seawater leak is detected. Take measures. Depending on the degree of seawater leak, the pure water 34 produced by the pure water production device 32 and stored in the pure water tank 33 can be supplied by the pure water pump P ₂ to take measures to reduce the salinity of the condensate 65. .

  Further, a cold line process for circulating the feed water directly from the boiler furnace 51 to the condenser 63 is performed, and measures are taken to stop the supply of steam containing salt to the steam system side until the salt concentration of the condensate 65 decreases. be able to.

Furthermore, even when cleaning measures are required in the steam pipes, only the steam pipes attached with salt can be inspected and cleaned.
As a result, as in the conventional case, the vacuum breakage in the case of opening all the steam pipes prevents a problem that the salt content is dissolved in the drain due to the saturation of oxygen inside the steam pipes. be able to.
As a result, it is possible to prevent the internal corrosion of the steam pipe from being promoted in a place where seawater leak countermeasures are unnecessary.

  Thus, even in boiler operation, the internal state of the steam pipe can be confirmed when necessary, so even if seawater leaks occur, early measures can be taken in the steam line of the steam system. it can. Thereby, the operation stop of the boiler can be avoided by extending the life until the time of periodic inspection once every two years.

According to this embodiment, by closing the valves V ₁ and V ₂ interposed in the branch line 22, the inflow of the branch steam 52 a is stopped from flowing into the inspection pipe 24. Thereafter, the inside of the inspection pipe 24 can be confirmed by removing the inspection pipe 24 from the detachable flanges 23a and 23b. Also, the presence or absence of salt can be confirmed by cleaning the inside of the inspection pipe 24 with a cleaning liquid and analyzing the cleaning liquid.

  The boiler steam system salt content monitoring method of this embodiment is a boiler steam system salt content monitoring method for monitoring the presence or absence of salt on the inner surface of the steam pipe 13 for supplying steam 52 from the boiler. The distribution pipe 21 is arranged in parallel, and the branching steam 52a is always supplied to the monitoring distribution pipe 21 arranged in parallel, and when the salinity monitoring is necessary during boiler operation, the inflow of the branching steam 52a is stopped, After the monitoring distribution pipe 21 cools, the presence or absence of adhesion of salt in the monitoring distribution pipe 21 is confirmed.

  Thereby, when the salinity is contained in the steam 52 in the steam pipe 13, the salinity is also contained in the branch steam 52 a passing through the parallel monitoring distribution pipe 21. After stopping the inflow of the branch steam 52a from the cooling pipe 21 and cooling the monitoring distribution pipe 21, the presence or absence of salt content in the monitoring distribution pipe 21 is checked to monitor the salinity in the pipe even during boiler operation. Can do.

In addition, a part of the monitoring distribution pipe 21 is used as an inspection pipe 24 that can be freely attached and detached, and the inspection pipe 24 is removed to check whether or not there is an internal salt content.
Thus, the inside of the inspection pipe 24 can be confirmed by removing the inspection pipe 24.

In addition, a part of the monitoring distribution pipe 21 is made to be a removable inspection pipe 24, the inspection pipe is removed, the cleaning liquid is supplied to the inside and washed, and then the cleaning liquid is analyzed to check for the presence of salt. Check.
Thereby, the inside of the inspection pipe 24 can be cleaned with the cleaning liquid, and the presence or absence of salt can be confirmed by analyzing the cleaning liquid.

FIG. 2 is a schematic diagram of a boiler steam system salt content monitoring apparatus according to a second embodiment. In addition, the same code | symbol is attached | subjected to the member which overlaps with the structure of the salinity monitoring apparatus of the boiler steam system which concerns on Example 1, and the description is abbreviate | omitted. As shown in FIG. 2, the monitoring distribution pipe 21 of the salinity monitoring device for the boiler steam system according to this embodiment is configured such that a part of the steam 52 is branched from the steam pipe 13 as the branched steam 52 a, and the branched steam 52 a is again supplied. Branch inspection pipe 26 that flows into the steam pipe 13, valves V ₁ and V ₂ provided on the inlet side and outlet side that are interposed in the branch inspection pipe 26 and stop the inflow of the branch steam 52 a, and branch inspection A cleaning liquid supply means 28 for supplying a cleaning liquid 27 from the outside and an analysis means 29 for analyzing the cleaned cleaning liquid are provided in the pipe 26.

As in the first embodiment, when seawater leak is confirmed, during the boiler operation, the valves V ₁ and V ₂ are closed to stop the flow of the branch steam 52a. Next, after the branch inspection pipe 26 of the monitoring distribution pipe 21 is cooled, the cleaning liquid (pure water) 27 is supplied from the cleaning liquid supply means 28 into the branch inspection pipe 26 to clean the inside.

The cleaning liquid 27 is introduced into the analysis means 29 and measured online.
Note that the cleaning liquid may be collected in a separate container and then analyzed by the analysis means 29. With this analyzing means 29, the salinity concentration can be measured. Here, as the analysis means 29, for example, a conductivity meter, a Na ion meter, a Cl ion meter or the like can be used alone or in appropriate combination.
Further, by analyzing separately the electrical conductivity, K ions, Mg ions, SO ₄ ions, Na ions, Cl ions, Fe ions, etc., the salt damage status and the rust status can be evaluated.

  In this way, when no seawater leak occurs in the condenser, a part of the steam flowing through the steam pipe 13 is always introduced into the monitoring distribution pipe 21 as the branch steam 52a, and the steam pipe 13 is When seawater leak including salinity occurs in the flowing steam 52, the branch steam 52a passing through the parallel monitoring distribution pipe 21 also includes salt.

Therefore, when the salinity monitoring is necessary, the valves V ₁ and V ₂ are closed to stop the inflow of the branched steam 52a from the steam 52 and cool. Next, the valves V ₃ and V ₄ are opened, the cleaning liquid 27 is introduced into the branch inspection pipe 26 of the monitoring distribution pipe 21, and analyzed by the analyzing means 29 to determine whether or not salt has adhered to the branch inspection pipe 26. Check. Thereby, the salt content in the steam pipe 13 can be indirectly monitored.

If there is no abnormality, the introduction of the cleaning liquid 27 from the cleaning liquid supply means 28 is stopped, the valves V ₃ and V ₄ are closed, the valves V ₁ and V ₂ are then opened, and the branch vapor 52a is introduced. Prepare for inspection.

  According to the present embodiment, when there is seawater leak, the valve interposed in the branch line 22 is closed to stop the flow of the branch steam 52a into the branch inspection pipe 26, and then in the branch inspection pipe 26 The cleaning liquid 27 is supplied to the pipe, the inside of the branch inspection pipe 26 is cleaned, and the cleaning liquid 27 after the cleaning is analyzed by the analyzing means 29, so that the presence or absence of salt can be confirmed online.

  In the boiler steam system salinity monitoring method according to the present embodiment, the cleaning liquid 27 is supplied to the monitoring distribution pipe 21 by the cleaning liquid supply means 28 and cleaned, and then the cleaning liquid 27 is analyzed by the analysis means 29 and the salinity is measured. Check for adhesion.

  When the salinity is contained in the steam 52 in the steam pipe 13, the salinity is also contained in the branch steam 52 a passing through the parallel monitoring distribution pipe 21. After the flow of the steam 52a is stopped and the monitoring distribution pipe 21 is cooled, the inside of the monitoring distribution pipe 21 is cleaned with the cleaning liquid 27, and the cleaning liquid 27 is analyzed by the analyzing means 29 to confirm the presence or absence of salt content. Thus, it is possible to monitor the salinity in the pipe.

13 steam pipe 21 monitoring for distribution pipe 23a, 23b flanges V _1, V ₂ valve 24 inspection pipes 27 cleaning liquid 28 cleaning liquid supply unit 29 analyzing unit 51 the boiler furnace 52 steam

Claims (5)

Steam piping for supplying steam generated in the boiler;
A monitoring distribution pipe provided in parallel with the steam pipe, branched from the steam pipe, allowing a part of the steam to pass through, and returning the branched steam to the steam pipe again;
A valve for stopping the inflow of a part of the steam from the steam pipe during operation of the boiler , and
The monitoring distribution pipe is branched from the steam pipe as a part of the steam as branch steam, the branch steam flows again into the steam pipe, the branch pipe is interposed in the branch line, and the branch steam A valve to stop inflow,
An inspection pipe that is detachable through a detachable flange provided in the branch line, and
During the operation of the boiler, the branch steam passes through the distribution pipe for monitoring,
During the operation of the boiler, the salinity monitoring device for a boiler steam system is characterized in that the valve is closed to stop the inflow of branch steam and whether or not there is salt adhesion in the monitoring distribution pipe. Steam piping for supplying steam generated in the boiler;
A monitoring distribution pipe provided in parallel with the steam pipe, branched from the steam pipe, allowing a part of the steam to pass through, and returning the branched steam to the steam pipe again;
A valve for stopping the inflow of a part of the steam from the steam pipe during operation of the boiler, and
The monitoring distribution pipe is interposed in the branch inspection pipe and a branch inspection pipe in which a part of the steam is branched from the steam pipe as branch steam, and the branch steam flows into the steam pipe again. A valve provided on the inlet side and the outlet side for stopping the inflow of the branch vapor; a cleaning liquid supply means for supplying a cleaning liquid from the outside into the branch inspection pipe; and an analysis means for analyzing the cleaning liquid after the cleaning. ,
During the operation of the boiler, the branch steam passes through the distribution pipe for monitoring,
During the operation of the boiler, the salinity monitoring device for a boiler steam system is characterized in that the valve is closed to stop the inflow of branch steam and whether or not there is salt adhesion in the monitoring distribution pipe . A boiler steam system salt content monitoring method for monitoring the presence or absence of salt on the inner surface of a steam pipe for supplying steam from a boiler,
The steam pipe is arranged in parallel with a monitoring distribution pipe having an inspection pipe partially removable .
Always supply branching steam to the monitoring distribution pipes arranged in parallel,
During the boiler operation, stop the inflow of the branch steam,
After the monitoring for the distribution pipe has cooled, remove the test pipe, salinity monitoring method for a boiler steam system, wherein should check the presence or absence of adhesion of the internal salt. A boiler steam system salt content monitoring method for monitoring the presence or absence of salt on the inner surface of a steam pipe for supplying steam from a boiler,
The steam pipe is arranged in parallel with a monitoring distribution pipe having an inspection pipe partially removable.
Always supply branching steam to the monitoring distribution pipes arranged in parallel,
During the boiler operation, stop the inflow of the branch steam,
A boiler steam system characterized in that after the monitoring distribution pipe cools, the inspection pipe is removed, the cleaning liquid is supplied to the inside for cleaning, the cleaning liquid is analyzed, and the presence or absence of salt is confirmed. Salt monitoring method. A boiler steam system salt content monitoring method for monitoring the presence or absence of salt on the inner surface of a steam pipe for supplying steam from a boiler,
A monitoring distribution pipe is arranged in parallel with the steam pipe,
Always supply branching steam to the monitoring distribution pipes arranged in parallel,
During the boiler operation, stop the inflow of the branch steam,
After the monitoring distribution pipe has cooled,
Wherein the dispensing tube for monitoring, washed by supplying externally et wash solution, to analyze the washings, salinity monitoring method for a boiler steam system, characterized in that to check for adhesion of salt.

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