JP3384946B2 - Method for evaluating performance of anion exchange resin and apparatus used for the method - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus for treating water containing an ionic component, and more particularly to a condensate system for a thermal power plant, a nuclear power plant or the like. The present invention relates to a method for evaluating the performance of an anion exchange resin used in an ion exchange device such as a condensate desalination device installed in, and an apparatus used therefor.

[0002]

2. Description of the Related Art The background art of the present invention and the conventional method will be described below as an example in which the present invention is applied to a condensate demineralizer in a circulating water system installed in a thermal or nuclear power plant.

In a facility of a thermal power plant or a nuclear power plant, steam after driving a turbine is cooled with seawater or the like to be condensed water, and the condensed water is heated again to drive the turbine. The cycle is repeated, and the water in the system circulated in this cycle is contaminated with various impurity ions and iron oxide fine particles (clad). Therefore, a condensate demineralizer (ion exchanger) is installed in the middle of the circulating water system for its removal.

The condensate demineralizer is generally composed of a water flow system consisting of a mixed-bed desalting tower (hereinafter simply referred to as "desalting tower"), and usually an ion exchange resin used in this desalting tower. Regeneration system for regenerating is attached. As the ion exchange resin, an H type or NH _{4 type} strongly acidic cation exchange resin and an OH type strongly basic anion exchange resin are used as a mixture, and N contained in the condensate to be passed is used.
It is used to remove impurities such as a-ions and Cl-ions by an ion-exchange action, and if necessary, to remove the clad in the condensate by filtering action or adsorption action together with ion removal. Usually, a plurality of the desalting towers are provided, and one desalting tower has reached the end point of water flow due to the pressure loss due to the accumulation of clad and the constant volume throughput, or the ion exchange resin being saturated with impurity ions. Sometimes, the desalting tower that reached the end of water passage is separated from the water passage system, and while continuing water passage in other desalting towers, the ion exchange resin of the separated desalting tower is regenerated by the regeneration system, Enables continuation and regeneration of water flow.

In the regeneration treatment, the ion-exchange resin having undergone the regeneration treatment is temporarily stored in a storage tank, and the ion-exchange resin of the desalting tower which has reached the end point of water flow is transferred to the regeneration tower and simultaneously stored in the storage tank. There are various methods such as a method of returning the regenerated ion exchange resin to this desalting tower, a method of regenerating the ion exchange resin from one desalting tower without providing a storage tank and returning it to the original desalting tower again. In the regeneration operation, after the clad was washed and removed by bubbling, the anion exchange resin was separated in the upper layer and the cation exchange resin was separated in the lower layer due to the difference in specific gravity. The cation exchange resin passed an acid regenerant such as sulfuric acid and anion exchange. One-column regeneration method in which an alkali regenerator such as caustic soda is passed through the resin to desorb impurity ions, and both anion and cation on-exchange resins are separated into separate regeneration towers and regenerated. In there is such as another tower playback system to play.

As described above, the ion exchange resin used in the condensate demineralization tower is generally used for several years while repeating the regeneration treatment. However, when the ion exchange resin is used for a long period of time, it gradually increases. Since it is unavoidable that the performance deteriorates, the ion exchange resin whose performance has deteriorated is replaced. This performance deterioration is particularly remarkable in the anion exchange resin which may be contaminated by organic substances and the like.

In order to replace an ion-exchange resin whose performance has deteriorated, it is strongly required in an industrial apparatus to judge the degree of deterioration as accurately as possible and appropriately manage the replacement time. Appropriate management of this makes it possible to effectively use the materials used, especially at nuclear power plants because it is possible to reduce the amount of waste, which is extremely beneficial.In addition, through these, the operating costs of the condensate desalination system at the power plant can be reduced. This is because it can be reduced.

From such a point of view, there have been proposals for grasping the performance (deteriorated state) of the ion exchange resin as accurately as possible, but the ions actually used in the condensate demineralization tower have been proposed. Since the performance evaluation of the exchange resin is not technically easy, it is not easy to properly manage the exchange time of the ion exchange resin in the industrial equipment.

For example, in JP-A-61-262749, a column having a resin layer height similar to that of an actual apparatus is filled with an ion-exchange resin sampled from the actual apparatus, and test water is passed through the column to give the quality of the treated water. Has proposed a method for determining the performance of the ion exchange resin (hereinafter referred to as "sampling method"). However, this method has a problem that it takes several days or more and an immediate response cannot be taken because it is a sampling method operation in which the ion exchange resin is removed from the actual apparatus and a performance evaluation test is performed using another test column. There is also a drawback that the test results obtained by this method do not accurately indicate the performance of the ion exchange resin actually used. That is, the anion exchange resin used in the condensate demineralizer (similar to the cation exchange resin) has a certain distribution range of particle size, and this difference in particle size is related to the degree of performance deterioration. This is because even if the exchange resin is tested, the effect that it does not accurately reflect the performance of the entire anion exchange resin in the actual apparatus cannot be ignored (see JP-A-62-4448).

As another conventional method, there are proposals in Japanese Patent Laid-Open No. 62-4448 and Japanese Patent Laid-Open No. 2-36340, but these are also methods for evaluating performance by sampling an ion exchange resin in the same manner as above. However, the drawbacks of the sampling method described above cannot be overcome for use in industrial equipment.

Apart from these sampling (off-line) methods, a method is proposed in which the information directly obtained from the actual device is measured to evaluate the performance of the anion exchange resin (Japanese Patent Laid-Open No. Hei 4)
-220562). This method repeats the operation of directly measuring the amount of anion leaked from the water tower when returning the ion-exchange resin after the regeneration processing to the water tower to pass pure water, condensate, etc. This is a method of examining the history of changes in the anion leakage amount for each regeneration treatment and determining the degree of progress of performance deterioration of the anion exchange resin based on this history.

This method has the following advantages. That is,
Anion leaking to the normal water flow during operation after being restored regenerated ion exchange resin in the operating state (when regenerant of the cation exchange resin is sulfuric acid SO ₄ ^-: below this will be described in the case of sulfuric acid) amount of Is an extremely small amount, and since it is data obtained from an actual device, it is unavoidable that it fluctuates due to various factors, so it is not reliable as information for evaluating the performance of anion exchange resins, but it is a regenerated ion exchange resin. During the initial water flow returned to the water tower, the phenomenon that SO ₄ ions leaked from the ion exchange resin for a certain period of time was observed.
The SO ₄ ^- leakage often compared to normal operating conditions said to be small. Therefore, an ion chromatograph analyzer (for example, an ion chromatograph analyzer IC-70 manufactured by Yokogawa Electric Co., Ltd.)
Ion chromatograph for process equipped with 00 (A
U-10)) and the like can be detected online the amount specified by the ionic species in the water flowing out of the water passing column of real devices by using the (in-line), yet the water flow returning initial SO ₄ ^- leakage behavior ( The characteristic that the leakage amount gradually decreases) changes during repeated regeneration, and the change reflects the deterioration of the performance of the anion exchange resin.Therefore, the recycled ion exchange resin is returned to the water tower of the actual device and water is passed. By measuring the leakage behavior of SO ₄ ⁻ at the time of restarting the operation for each regeneration treatment and examining the change history of the anion exchange resin, it is possible to determine the degree of progress of the performance deterioration of the anion exchange resin.

According to this method, it is possible to judge the state of performance deterioration by directly using the information of SO ₄ ⁻ leaking from the water tower of the industrially used actual equipment, so that a part of the ion exchange resin is taken out. It is excellent in that it can solve the problem of the above-mentioned sampling method that must be taken.

[0014]

By the way, the above method is excellent as a method for evaluating the performance of the anion exchange resin of the industrial condensate demineralizer, because it does not require resin sampling.
However, there is a problem that it is difficult to apply the data obtained by a specific device to another device.

This problem is explained as follows. That is, a part of the anion exchange resin mixed and used in the condensate demineralizer is generally brought into contact with a regenerant (sulfuric acid) of the cation exchange resin during regeneration to form SO _{4 type} (hereinafter referred to as “R-SO _{4 type} ”). SO ₄ leaks out at the initial stage of water recovery, but the extent of this is affected by the fact that the proportion (%) of the R-SO _{4 type} anion exchange resin is not uniform depending on the device configuration. is there. Therefore, the fact is that the judgment based on the change history data of the anion leakage amount for each regeneration process obtained by one device cannot simply be applied to another device.

The reason why sulfuric acid, which is a cation exchange resin regenerant, comes into contact with an anion exchange resin that should not be contacted with it to form a part of R-SO ₄ form is as follows. That is, in the condensate demineralizer, the anion exchange resin and the cation exchange resin are separated by a specific gravity difference, and the regenerant is passed through each of them, but in the vicinity of the separation surface, both ion exchange resins cannot be avoided. Since the Na content in the cation exchange resin after regeneration is generally required to be extremely small, a regeneration method and apparatus configuration for preventing the cation exchange resin from coming into contact with caustic soda which is an anion exchange resin regenerator as much as possible. Is usually adopted. This problem exists in both the one-tower regeneration system and the two-tower regeneration system. When the acid regenerant is hydrochloric acid, part of the anion exchange resin is in the R-Cl form.

Further, the method disclosed in Japanese Patent Laid-Open No. 4-220562, which pays attention to the history of changes in the amount of anion leaked from each anion exchange resin for each regeneration treatment, is extremely advanced, which is required for the recent condensate desalination apparatus. Desalination performance, for example, the ion concentration in condensate is 0.1 μg / liter or less for Na ions,
There is also a problem that it is not sufficient to deal with the demand for high desalination performance of 0.1 μg / liter or less for Cl ions. That is, the change history of the anion leakage, which is an index for determining the replacement time of the ion exchange resin, is affected by the scale, configuration or operation status of the equipment attached to each power plant as described above. It is inevitable to estimate the prediction range with a certain width. In order to ensure high desalination performance in the desalination tower under such circumstances,
Even within the predicted replacement period, there is an operating tendency to replace the resin earlier, and therefore a more accurate evaluation method is required.

As described above, there has been a proposal to measure the degree of deterioration over time of the ion exchange resin used in the condensate demineralizer, but none of them is industrially sufficient, or The current situation is that further improvement is required.

From the viewpoint of solving the problems that are difficult to overcome by the conventional techniques as described above, the present invention details the properties of the anion exchange resin and the operation cycle of the ion exchange device, especially the condensate demineralization device. A method of studying and accurately predicting the state of performance deterioration of the anion exchange resin and effectively performing highly accurate performance evaluation of the anion exchange resin, and predicting the exchange time of the ion exchange resin in advance. The present invention has been made for the purpose of providing an effective method and a device for performance evaluation which can be used for implementing these methods.

Another object of the present invention is to evaluate the performance of an anion exchange resin actually used in an ion exchange device such as a condensate demineralizer in an in-line state without taking it out of the device. It is possible to provide a method and an apparatus which enables the measurement work to be performed without wasting time and labor.

Still another object of the present invention is to evaluate the performance of an actual ion exchange resin inside the device (in-line) without taking it out of the device, thereby making a difference in performance deterioration due to the particle size distribution of the resin. An object of the present invention is to provide a method and apparatus capable of performing accurate and highly accurate performance evaluation and the like by reducing the influence of.

Through the achievement of various objects as described above, the present invention can be applied to various actual power generation equipments which are individually designed for various reasons and have different structures, resulting in different structures and different operating conditions. The performance deterioration state of the anion exchange resin of the condensate demineralizer that is operated as an accessory is reduced or eliminated by reducing or eliminating the influence of the elements unique to each facility that is operated individually. It is an object of the present invention to provide a method capable of evaluating and determining the replacement time of the resin as accurately as possible, and an apparatus capable of carrying out this method.

[0023]

The above objects can be achieved by the inventions described in the claims of the present application.

The invention of the method for evaluating the performance of the anion exchange resin used in the ion exchange apparatus according to claim 1 of the present invention is to pass the performance evaluation water through the regenerated anion exchange resin, and determine the amount of anions leaked into the performance evaluation water. Based on the measured values obtained by measurement, the mass transfer coefficient (Mass Tra
nsfar Coefficient (MTC) value is estimated.

The invention according to claim 2 of the present application has a water passage system provided so as to remove impurity ions by an anion exchange resin, and a regeneration system in which the anion exchange resin is chemically regenerated and returned to the water passage system. In the apparatus, the performance evaluation water is passed through the anion exchange resin after the regeneration treatment, and the MTC value of the anion exchange resin is estimated based on the measured value obtained by measuring the amount of anions leaking into the water. Characterize.

Furthermore, the invention of claim 3 of the present application has a water passage system provided to remove impurity ions by the anion exchange resin and the cation exchange resin, and a regeneration system for chemically regenerating at least the cation exchange resin. In the device, performance evaluation water is passed through the mixed ion exchange resin of the cation exchange resin and the anion exchange resin after the regeneration treatment, and the amount of anions leaked into the water is measured, and the anion exchange is performed based on the measured value. It is characterized by estimating the MTC value of the resin.

The above-mentioned "mass transfer coefficient (MTC)" is
It is an index value showing the ion exchange reaction rate of the ion exchange resin. To be precise, for the anion exchange resin, the anion exchange resin (OH type) to be measured and the new cation exchange resin (H type) are in a predetermined ratio. It can be obtained by the following formula (i) as the migration rate of sulfate ions in the resin layer when mixed and packed in a column, and a fixed concentration of ammonia and sodium sulfate is passed through this column (hereinafter, this can be obtained by "MTC"). Value calculation method "). The K value of the new anion exchange resin is generally about 2.0 × 10 ⁻⁴ m / sec.

[0028]

[Equation 1]

The reason why the present inventor has adopted the above configuration is as follows. That is, the MTC value is an index showing the ion exchange reaction rate of the ion exchange resin, and directly represents the ion exchange capacity (performance) of the resin. Therefore, the deterioration of the performance of the anion exchange resin caused by the contamination of the organic matter is the deterioration of the ion exchange capacity of the resin. Therefore, if this MTC value is known, the ion exchange capacity of the anion exchange resin or the degree of deterioration (deterioration) over time. Can be judged.

However, it is necessary to use the special evaluation water (ammonia and sodium sulfate) for the measurement of the MTC value as described above, and it is impossible to pass this water to the actual apparatus. Therefore, the measurement of the MTC value is so-called. It is necessary to sample the resin and take the measurement for several days. However, this cannot solve the problem of the conventional sampling method.

Therefore, the inventors of the present invention further studied, and when water was passed through the anion exchange resin which had been returned to the water-passing system after being regenerated in an actual device, the amount of anions (acid groups) leaked into the water-passage was It depends on the ion exchange reaction rate of the anion exchange resin, while the MTC value of the anion exchange resin has a correlation with the ion exchange reaction rate, and is based on the measured value (detection value) of the anion leakage amount. Therefore, the inventors have reached the invention of the above-mentioned constitution by paying attention to the fact that the MTC value of the anion exchange resin can be estimated. Examples of the performance evaluation water used in the present invention include high purity water such as ion-free pure water and ultrapure water of claim 4, or condensate, and condensate is generally preferred. Used for. Further, the performance evaluation water is passed through the anion exchange resin after the regeneration treatment by any of the case of performing after the resin is returned to the water column, the case of performing in the regeneration tower, and the case of performing in the resin storage tank. be able to.

As a method of regenerating a condensate desalination apparatus having a water passage system and a regeneration system, when the condensate water passage treatment is completed, the anion exchange resin is not regenerated in the regeneration system. A method has been proposed (Japanese Unexamined Patent Publication No. 6-170362), in which only the cation exchange resin is chemically regenerated, and thereafter, both ion exchange resins are transferred to a water passage system to restart the passage of condensed water. The method for evaluating the performance of the anion exchange resin can be suitably applied to such a case.

A specific operation for estimating the MTC value based on the measured value data of the anion leakage amount is, for example, claim 6.
Methods 10 to 10 can be mentioned, which will be described later.

According to the present invention, the anion exchange resin M
Since the ion exchange capacity of the anion exchange resin at the time of measurement can be substantially obtained by estimating the TC value, the exchange time can be accurately predicted in advance.

The sampling method "MT"
The operation of "C calculation method" may be appropriately performed at a necessary time.

In the invention of claim 6 of the present application, the estimation of the MTC value in each of the above inventions is performed by preparing a plurality of anion exchange resins having known MTC values and different values. By passing water for each performance evaluation, the correlation between the MTC value and the amount of anions leaked into the performance evaluation water is checked in advance for each anion exchange resin having different MTC values, and the correlation data of both is obtained. The MTC value of the anion exchange resin to be measured based on the correlation data obtained in advance from the measured value of the amount of anions leaking when water is passed through the anion exchange resin to be measured for performance evaluation. Is estimated.

As the anion exchange resin having a known MTC value in the present invention, for example, a new resin and a plurality of anion exchange resins whose performances are deteriorated due to use are determined by the above-mentioned "MTC calculation method". I can list things. Known MTC values are not limited, but are, for example, 0.5, 1.
An example is the case where four types of 0, 1.5, 2.0 (× 10 ⁻⁴ m / sec) are used.

According to the present invention, the predetermined MTC described above is used.
A performance test water (preferably high-purity water or condensate used in actual equipment) is passed through each anion exchange resin of which the value is known, so that the performance evaluation water can be changed for each anion exchange resin for each MTC value. It is possible to obtain a certain correlation between the MTC value and the amount of anions leaked into the simulated test water by preliminarily investigating the relationship between the amount of anions leaked out. For example, from the anion exchange resin returned to the water tower after being regenerated by an actual device. Based on the correlation from the amount of anions leaked into the water flow, M
The TC value can be estimated.

According to the invention of claim 7, in the invention of claim 6, the correlation data between the value of the mass transfer coefficient of the anion exchange resin having a known MTC value and the amount of anions leaked from the anion exchange resin to be investigated in advance are obtained. , A part of the anion exchange resin is in contact with the acid regenerant, and is calculated for each ratio (%).

The proportion (%) of a part of the anion exchange resin that comes into contact with the acid regenerator is set in the vicinity of the separation structure when the anion exchange resin and the cation exchange resin are separated vertically due to the difference in specific gravity. It is determined by the position of the collector (means for discharging regenerated medicine), etc., and is generally 5% to 30
It is in the range of about%. Then, the ratio of the anions (SO ₄ ²⁻ when the regenerant is sulfuric acid and Cl ⁻ when the regenerant is sulfuric acid) contained in the anion exchange resin returned to the water flow system (hereinafter referred to as “R—SO ₄ %”). or by called "R-Cl%" in the following description will be representatively in the "R-sO _4%"), since also different leakage anion weight, the MTC value known anion exchange resin described above, each R -Each SO ₄ %,
R-SO ₄ % by carrying out a simulation test in which the correlation data between the MTC value of each anion exchange resin having a different MTC value and the measured value of the amount of anions leaked into the water is investigated in advance.
Another correlation between the two can be obtained. R to check in advance
Although -SO ₄ % is not limited, for example, 0%, 5%, 10%, 15%, 20%, 25%, 30
A typical example is the case where each percentage is divided.

According to the present invention, for example, even if the R-SO ₄ % differs for each condensate demineralizer, the corresponding R-SO ₄ %
The MTC value at the time of measurement of the anion exchange resin can be more accurately estimated from the amount of anions leaked into the water through an actual device by using the data obtained by examining SO ₄ % in advance.

According to the invention of claim 8 of the present application, the correlation data between the value of the mass transfer coefficient of an anion exchange resin having a known MTC value and the measured value of the amount of anions leaking from the anion exchange resin are obtained from the anion exchange resin. It is characterized in that it is determined for each time length (referred to as “spray time”) until water is passed through the performance evaluation water after the regeneration treatment.

The seeding time is generally the length of time from the end of the regeneration treatment, that is, the regeneration treatment of regenerant drug-extrusion of chemicals-washing, to the return to the water tower to restart water flow. That is to say, in the present invention, it means the length of time from the regeneration treatment to the start of water flow of the performance evaluation water. Regardless of the state of transfer and retention of the anion exchange resin, the length of the levitation time affects the amount of anion leaked after the water flow is resumed by diffusing the anions in the resin out of the resin. Therefore, in order to obtain a more accurate MTC value, it is preferable to adopt the configuration of the invention in consideration of this influence. The effect of the cleaning time is relatively small,
In addition, even if the R-SO ₄ % is different, the influence of the boiling time has a similar tendency. Therefore, using the data investigated for one R-SO ₄ % anion exchange resin, the other R-SO ₄ % is used.
You may make it correct in case of SO ₄ %.

According to the present invention, for example, even when the time length from the regeneration of the anion-exchange resin of the condensate demineralizer to the return to the water tower and the restart of water passage (repair time) is different, the actual equipment is used. The MTC value at the time of measurement of the anion exchange resin can be more accurately estimated from the measured value of the amount of anions leaking into water.

In the ninth aspect of the present invention, in each of the above inventions, the MTC value is estimated based on the correlation data between the known MTC value and the leaked anion amount.
The calibration curve data indicating the relationship of the C value is obtained in advance, and from the measured value of the amount of leaked anions obtained when water for performance evaluation is passed through the anion exchange resin of the measurement object, the calibration curve data of the measurement object is used. It is characterized in that the MTC value of the anion exchange resin is obtained.

According to the present invention, the MTC value correlated with the amount of anions leaked from the anion exchange resin to be measured can be easily obtained by using the calibration curve data.

Instead of using the above calibration curve,
An empirical formula showing correlation data between the MTC value and the leaked anion amount was obtained, and the measured value of the leaked anion amount obtained when water for performance evaluation was passed through the anion exchange resin to be measured was substituted into this empirical formula. Alternatively, the MTC value may be obtained.

In the tenth aspect of the present invention, in each of the above-mentioned inventions, the change in the anion leakage value contained in the performance evaluation water that passes through the time when the amount of anion leakage leaking from the anion exchange resin is measured becomes small. It is characterized in that it is the point of time.

In the above description, "a slight change in the anion leakage value" means that the change in the anion leakage amount per unit time is 0 to 0.5 µg / liter / 30 minutes, preferably 0 to 0.1 µg / liter /. 30 minutes is good,
Generally, the case where the leakage of anions reaches a so-called constant leak can be mentioned.

According to the present invention, since the measurement (detection) is performed when the degree of change in the leak amount becomes small, the influence of the measurement error can be reduced.

According to the eleventh aspect of the present invention, in each of the above inventions, the point at which the amount of anion leaked from the anion exchange resin returned to the water tower after the regeneration is measured is the time when the performance evaluation water is passed through the anion exchange resin. A predetermined time after starting water,
Generally 10 minutes to 180 minutes, preferably 30 minutes to 12
Characterized by the fact that the time has passed in the range of 0 minutes,
According to the present invention, the measurement work can be simplified.

Each of the above inventions can be used to evaluate the performance of the anion exchange resin of the ion exchange apparatus which regenerates and uses the ion exchange resin, and in particular, the condensate desalination system installed in the condensate circulation system of the power plant. It is effective for evaluating the performance of the anion exchange resin used in the equipment and predicting the replacement time in advance.

The invention of the performance evaluation device for anion exchange resin according to claim 13 of the present application is to allow performance evaluation water to pass through a plurality of anion exchange resins having known MTC values and different values, and to leak into the water. Recording means for recording the result of previously examining the correlation data between the MTC value and the leaked anion amount of each anion exchange resin by measuring the amount of anion to be used, and the performance evaluation water that has passed through the anion exchange resin after the regeneration treatment. It is characterized in that it is provided with a measuring means for measuring the amount of anions leaked to the substrate, and a calculating means for calculating the measured MTC value of the anion exchange resin from the measured anion amount and the record information of the recording means.

Performance evaluation in the above-mentioned construction As the measuring means for measuring the amount of anions leaking into water, the above-mentioned ion chromatograph analyzer (ion chromatograph analyzer IC) is used.
A process ion chromatograph (AU-10) equipped with -7000: manufactured by Yokogawa Electric Co., Ltd. can be used.

Generally, the recording means and the arithmetic means can be constructed by using computer technology, and the recording means can be an internal storage means (memory) or an external storage means.

According to the present invention, the amount of anions leaking into the performance evaluation water that has passed through the anion exchange resin after the regeneration treatment is measured (detected) by the measuring means, and the measurement result is recorded in advance in the recording means. In light of the correlation data between the MTC value and the leaked anion amount, M of the anion exchange resin to be measured
The TC value can be estimated.

According to a fourteenth aspect of the present invention, the mass transfer coefficient (MTC) value of the anion exchange resin obtained by the above-mentioned calculation means is compared with a predetermined MTC threshold value to determine the exchange time of the anion exchange resin. According to this, it is possible to predict the exchange time of the anion exchange resin, and the operation and management such as preparation of the ion exchange resin are facilitated.

In the invention of claim 15 of the present application, in the above invention, the correlation data between the MTC value of each anion exchange resin and the amount of anions leaked when water for performance evaluation is passed through each anion exchange resin are recorded. The recording means records the correlation data for each proportion (%) of a part of the anion exchange resin in contact with the acid regenerator and / or for each length of time until water for performance evaluation is passed after the regeneration treatment. The invention according to claim 16 has an external input means such as a keyboard for specifying the correlation data corresponding to the anion exchange resin to be measured from the correlation data recorded in the recording means. It is characterized by

According to the present invention, for example, by preparing a recording means for recording the correlation data of the MTC value and the amount of leaked anions in various cases where R-SO ₄ % and the healing time are different, the structure and operation of the apparatus are prepared. It is possible to provide an anion exchange resin performance evaluation device that can be commonly used for ion exchange devices having different conditions.

[0060]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on embodiments shown in the drawings.

Embodiment 1 FIG. 1 is a flow chart showing an outline of the constitution of a condensate demineralizer constructed to carry out the method of the present invention. A salt tower (water tower) 1 is provided.

In this figure, reference numeral 1 denotes a desalting tower in which a H-type (or NH ₄ -type) cation exchange resin and an OH-type anion exchange resin are packed as a mixed ion exchange resin 2 in each tower. A condensate inflow pipe 4 is connected to an upper part of the tower 1 via an inlet valve 3, and a condensate outflow pipe 6 is connected to a lower part of the tower 1 via an outlet valve 5.

Reference numeral 7 denotes a one-column regeneration type regeneration tower for taking out the mixed ion-exchange resin 2 from the desalting tower 1 which has reached the end point of water flow, and performing backwash separation and regeneration, and 8 is regeneration in this regeneration tower 7. The resin storage tank for temporarily storing the cation exchange resin and the anion exchange resin is shown. The upper part of the regeneration tower 7
The lower part of each desalting tower 1 is connected with a resin transfer pipe 9 shown by a dotted line, and the lower part of the regeneration tower 7 is connected with an upper part of the resin storage tank 8 by a resin transfer pipe 10 shown by a dotted line.
Further, the lower part of the resin storage tank 8 and the upper part of the three desalting towers 1 are connected by a resin transfer pipe 11, respectively. The valves provided to open the resin transfer pipes 9, 10 and 11 only when necessary are omitted for convenience because the figure is complicated.

When the condensate demineralizer is operated normally in the above structure and the mixed ion-exchange resin 2 of the desalting tower 1 on the left side of the figure reaches the water end point, the other two desalting towers are assumed. 1,
1, the inlet valve 3 and the outlet valve 5 of the desalting tower 1 are closed while the water passing desalination treatment of 1 is continued, while the resin transfer pipe 9 (not shown) is used.
Open the normally closed valve of the column to open the mixed ion exchange resin 2 of the desalting tower 1.
Is transferred to the regeneration tower 7 in the form of slurry.

When the transfer of the resin 2 reaching the end point of water flow to the regeneration tower 7 is completed, the regenerated mixed ion exchange resin 2 temporarily stored in the resin storage tank 8 is removed through the resin transfer pipe 11 as described above. The slurry is transferred to the salt tower 1, and upon completion of the transfer, the inlet valve 3 and the outlet valve 5 are opened, and the state of performing desalination of water again is restored.

On the other hand, the mixed ion exchange resin 2 sent from the desalting tower 1 to the regenerating tower 7 is regenerated by a normal regeneration treatment. That is, in the mixed ion exchange resin transferred into the regeneration tower 7, the anion exchange resin and the cation exchange resin are separated into upper and lower two layers by backwash separation or the like, and the regenerant is passed through each resin (cation. For example, sulfuric acid is passed as an acid regenerant for the exchange resin, and caustic soda is passed as an alkali regenerant for the anion exchange resin). Then, following this, the passed chemical solution is extruded, the resin is washed, and the regeneration process is completed.

The regenerated mixed ion exchange resin is transferred to the resin storage tank 8 through the resin transfer pipe 10 and is on standby for storage.

An outline of the resin regeneration treatment in the regeneration tower 7 is shown in FIG. That is, the lower cation exchange resin 702, which has been backwashed in the tower 701 and separated by specific gravity by sedation
And the upper anion exchange resin 703 form a separation surface 704 for separation. In order to prevent the cation exchange resin from coming into contact with the alkali regenerant (for example, NaOH solution), the collector 705 for extracting the regenerant waste liquid out of the tower is arranged at a fixed position (for example, about 100 mm) above the separation surface 704. Has been done. In this state, first, an alkali regenerator (NaOH
Solution) and discharged from the collector 705 to the outside of the tower, and then an acid regenerant for regeneration of the cation exchange resin (for example, a sulfuric acid solution) is passed from the lower part of the tower to the cation exchange resin and then from the collector 705 to the outside of the tower. Extract and regenerate each resin.
As a result, the anion exchange resin existing in a certain range 706 from the separation surface 704 to slightly above the collector 705 comes into contact with the sulfuric acid solution to form R-SO _{4 type} , and this R
If the ratio of the anion exchange resin in the form of —SO _{4 to the} entire anion exchange resin is 5%, R—SO ₄ 5
%. The above configuration and operation are the same as in the case of the conventional condensate demineralizer.

As is clear from the above description, the ratio of the anion exchange resin which becomes R-SO _{4 type} upon contact with the sulfuric acid solution during regeneration of the cation exchange resin depends on the position where the collector 705 is attached and the separation surface 704 formed. It can be said that the position of the separation surface 704 is substantially determined by the distance between them.
The ratio of the anion-exchange resin that comes into contact with the sulfuric acid solution increases as the position moves downward from the position (1), and conversely, the ratio decreases as the position of the separation surface 704 approaches the position of the collector 705.

The regeneration method in the regeneration equipment of the condensate demineralizer includes, in addition to the so-called one-column regeneration system in which the cation exchange resin and the anion exchange resin are regenerated in the same regeneration tower as described above, cation exchange. There is a method of separating the resin and anion exchange resin by specific gravity in a cation regeneration tower, and then transferring the anion exchange resin separated in the upper layer to the anion regeneration tower to regenerate both ion exchange resins in different regeneration towers. However, in this case, the R—SO _{4 type} resin is produced by contacting the anion exchange resin remaining in the separation and cation regeneration tower after transfer of the anion exchange resin with sulfuric acid which is a regenerant of the cation exchange resin. It In this case, the amount of the anion exchange resin remaining in the separation and cation regeneration tower, that is, the amount of the anion exchange resin which is in contact with sulfuric acid to form R-SO ₄ form is determined by the separation surface between the cation exchange resin and the anion exchange resin. Forming position and attachment position of anion exchange resin transfer port attached to the separation / cation regeneration tower for extracting the anion exchange resin separated in the upper layer to the outside of the separation / cation regeneration tower and transferring to the anion regeneration tower Depends on the relationship with.

Next, the characteristic configuration and operation of this example will be described.

As described above, the mixed ion exchange resin 2 transferred to the regeneration tower 7 is subjected to a predetermined regeneration treatment, and in the one-tower regeneration system, the mixed ion exchange resin 2 after the regeneration treatment is transferred to the resin storage tank 8. Then, the storage is kept waiting until the next transfer to the desalting tower. Then, the regenerated mixed ion exchange resin 2 stored in the resin storage tank 8 is transferred to the desalting tower 1 from which the above ion exchange resin has been removed, and after performing operations such as mixing, blowing and recirculating, the inlet valve 3 and the outlet valve 5 are opened to return to the state in which water desalination treatment is performed again. In the case of this example, the time length from the end of the regeneration process in the regeneration tower 7 to the time at which the resin is returned from the resin storage tank 8 to the desalting tower 1 to finish the mixing and the blowing operation is started is negligible. It's time.

In this example, the regenerated mixed ion exchange resin 2 is returned from the resin storage tank 8 to the desalting tower 1 and a predetermined mixing operation is performed, and then the deionization tower is supplied with, for example, a pure water supply pipe 12. Then, pure water (for example, 5 μS / cm or less) is supplied to the desalting tower at SV10 to 50 for a predetermined time. Waste water (pure water) generated at that time is opened by opening the normally closed valve 15, and the water supply pipe 1
Water is sent to the ion chromatographic analyzer 13 shown in FIG. 1 via the No. 4 and the concentration of SO ₄ ions leaked into the waste water is measured to obtain measurement data for estimating the MTC value for the anion exchange resin. The obtained measurement data is sent to the arithmetic and control unit 16. As the ion chromatographic analyzer, the above-mentioned ion chromatograph analyzer IC-7000 (manufactured by Yokogawa Electric Co., Ltd.), which is known as an apparatus capable of specifying an ion species and detecting the amount of the ion, can be used.

FIG. 3 shows an outline of the arithmetic and control unit,
In this example, the configuration is as follows. That is, MPU
In the main arithmetic unit 161 composed of (microcomputer unit), R-SO ₄ % (specific to the mixed ion exchange resin 2 of the device, which is determined by the configuration and operation of the desalting tower 1 and the regeneration treatment equipment of FIG. In this example, for example, R-SO ₄ 5%) and the information of the leaning time are input by the operator in advance using an external input device 162 such as a keyboard, and the input information causes the corresponding R-SO from the storage (recording) device 163. _The data showing the correlation between the MTC value specific to ₄ % and the healing time and the amount of leaked anions is read out. The correlation data between the MTC value peculiar to R-SO ₄ % and the resting time and the amount of leaked anions is previously checked by an operation described later, for example, RO
It can be stored in the storage device 163 as M.

Next, in the above-described ion chromatograph analyzer 13 of FIG. 1, SO ₄ leaking into the pure water blown (discharged) when pure water is supplied to the mixed ion exchange resin returned to the desalting tower. Ions are measured (detected) and leaked SO ₄ after a certain time (for example, 120 minutes) has elapsed from the start of pure water blowing
The amount of ions is detected, and this information is input to the main arithmetic unit 161 as measurement information.

Then, R-SO ₄ % peculiar to the apparatus of FIG.
And leakage SO _{4 of the} above measurement information based on the correlation data between the MTC value corresponding to the leaning time and the amount of leaked anion.
The corresponding MTC value is calculated from the amount of ions. This is the MTC estimated value of the anion exchange resin in the mixed ion exchange resin that is the measurement target.

The calculated MTC estimated value of the anion exchange resin is displayed on the display means 164 such as an appropriate CRT. Further, in this example, the MTC estimated value is input to the anion exchange resin life prediction calculation device 165 to predict the exchange time of the anion exchange resin. The life prediction calculation device 165 can be configured as a comparison circuit, for example. That is, the first threshold value of the MTC value corresponding to the ion exchange capacity level at which the anion exchange resin cannot exhibit a predetermined desalination capacity,
The second threshold value of the MTC value corresponding to the ion exchange capacity level expected to reach the first threshold value in the next regeneration process, and the ions expected to reach the second threshold value by repeating the regeneration process several times. By setting each threshold value such as the third threshold value of the MTC value corresponding to the exchange capacity level, and comparing the MTC estimated value of the anion exchange resin calculated by the above-mentioned measurement with these threshold values, the exchange time of the anion exchange resin Can be predicted.

The information on the predicted replacement time of the anion exchange resin can be displayed on the display means 166 as required.

Next, an example of an operation of previously examining the correlation data between the amount of leaked anions and the MTC value using an anion exchange resin having a known MTC value is shown as a mixed ion exchange resin used in the condensate demineralizer of a power plant. The case will be described as an example.

First, a new (unused) cation exchange resin, a new (unused) anion exchange resin, and the resulting ion exchange performance (capacity) of the condensate demineralizer at the power plant.
Of anion exchange resins with different degrees of deterioration (decrease) are prepared.
The MTC value is accurately obtained by the "MTC value calculation method" using (ammonia and sodium sulfate) as evaluation water. In this example, the MTC value of each of the prepared anion exchange resins thus obtained was 0.
5, 1.0, 1.5 (over used), 2.0 (new).

Next, the anion exchange resin was regenerated using NaOH as an alkali regenerant,
Then, by passing a predetermined amount of sulfuric acid through the regenerated anion exchange resin, the ratio (%) of the anion exchange resin described with reference to FIG. 2 in contact with the acid regenerator is constant (for example, R-S
O ₄ 5%) as a regenerated ion exchange resin, a mixed ion exchange resin 2 in which an anion exchange resin of each MTC value and a new cation exchange resin previously regenerated with sulfuric acid are mixed separately.
As shown in FIG. 1, the ion-exchange resin column 20 simulating the desalting tower shown in FIG. 5 is packed, and pure water is passed from the upper part of the column 20 at a predetermined SV while a part of the discharged water is analyzed by an ion chromatographic analyzer. When 120 minutes have passed from the start of pure water flow, a state called a so-called constant leak was reached, and the anions (SO ₄
^2- ) Measure the amount.

This operation is carried out by using R-SO of anion exchange resin.
₄ to 0%, 5%, 10%, 15%, 20%, 25%, 3
Perform 0% respectively. FIG. 6 shows M as an example of the above.
Each of the above RSs when the TC value is 1.5 × 10 ⁻⁴ m / sec
Anions leaking from the anion exchange resin containing O ₄ % (SO
₄ ^2- ) Shows the change over time when the amount is measured.

As described above, SO water 120 minutes after pure water (performance evaluation water) was passed through after regeneration treatment of a plurality of anion exchange resins having known MTC values (four types in this example) was performed.
₄ ^2- leakage amount can be obtained separately from _4% each R-SO, it was summarized the data obtained from these results is shown in FIG 7. Thereby, the correlation data of the amount of leaked SO ₄ ²⁻ and the MTC value is obtained for each R-SO ₄ %.

FIG. 8 shows that pure water is blown into the demineralization tower of the condensate demineralizer of an actual power plant under the same conditions as for obtaining the correlation data of the leaked SO ₄ ²⁻ amount and the MTC value described above. It shows the result of measuring the change in the amount of leaked SO ₄ ^2- from the start of water flow, and the detected amount of SO ₄ ^2- leakage was detected 120 minutes after the start of water flow. It can be seen that the MTC value can be estimated from the correlation data of FIG.

Although the above explanation excludes the influence of the healing time, in general, the healing time is often the same in many devices. In that case, therefore, the simulation test is performed in accordance with the healing time. If the proofing time is different, the operation status of the device is determined in advance at the time of designing, so a corresponding simulated data can be prepared by performing a simulation test in accordance with it.

FIG. 9 shows an example of a determination method for predicting the replacement time of the anion exchange resin in the life prediction calculation device 165.

When the change in MTC value measured for each reproduction process is plotted with respect to the relation between MTC value and time (number of days), these relations are generally linear functions with a constant slope. Therefore, the MTC value of the ion exchange capacity, which is the limit for use in an actual machine, is set as a threshold value for a predetermined replacement time, or another threshold value is set which approaches the threshold value and requires replacement preparation. , The replacement time can be predicted by comparison with this. In FIG. 9, for example, MTC
The value 1.00 × 10 ⁻⁴ m / sec is shown as the threshold value indicating the replacement time.

Embodiment 2 In the above-described Embodiment 1, the R- generated by the reproduction processing is
Although the example in which SO ₄ % is set to a constant value peculiar to the apparatus has been described, the production amount of R-SO ₄ % is as shown in the description of FIG.
When the separation surface 704 is always formed at a fixed position, R-SO ₄ % may be used as a fixed value peculiar to the apparatus.

However, in the case of an ion exchange apparatus having a plurality of demineralization towers (usually 3 or more towers) like a condensate demineralization apparatus, the cation exchange resin and anion packed in the plurality of demineralization towers are used. It is difficult to make the exchange resin volumes exactly the same, and the packing amount is often slightly different for each desalting tower. In such a case, since the position of the separation surface formed in the regeneration tower is different for each ion exchange resin packed in each desalting tower, the amount of R-SO ₄ % produced by the regeneration treatment is also changed. It is different each time, and therefore, in this case, even with the same device, it is unreasonable to estimate the MTC value with R-SO ₄ % as a constant value.

In such a case, the position of the separation plane formed in the regeneration tower is automatically measured for each regeneration process, and the measured separation plane position and the reference separation preset at the time of designing the apparatus. R-S generated from the relationship with the surface position
O ₄ % was obtained, and based on this R-SO ₄ %, the above-mentioned FIG.
It is preferable to estimate the MTC value from such a graph.

FIG. 10 shows the position of the reference separation plane and the generated R.
₃ is a graph showing an example of the relationship with the ratio of -SO ₄ (R-SO ₄ %), where the horizontal axis is the distance between the reference separation surface and the separation surface that is actually formed, and the reference separation surface position is "0". It is shown. (+) Means that the actual separation surface is formed above the reference separation surface, and (−) means that the separation surface is formed below the reference separation surface. If such a graph is obtained in advance, R-SO ₄ % at that time can be obtained only by measuring the position of the separation surface formed in the regeneration tower. The reference separation surface is, for example, the lower side 1 of the collector.
The position is set to about 00 mm.

As a method for measuring the position of the separation surface, for example, as proposed in Japanese Patent Laid-Open No. 58-88038, the position of the separation surface formed in the regeneration tower is set as the observation window of the regeneration tower. A method of detecting the formation position of the separation surface based on the color difference between the cation exchange resin and the anion exchange resin from the obtained photographing information by photographing with an image pickup means such as an attached CCD camera, and JP-A-4-83538. As proposed in the publication, a method of detecting the formation position of the separation surface based on the difference in particle size between the cation exchange resin and the anion exchange resin existing in the vicinity of the separation surface, based on the imaging information obtained by the imaging means, etc. Can be used.

Embodiment 3 This example illustrates the case where hydrochloric acid is used as an acid regenerant. In this case as well, in the same manner as in Embodiment 1, first, a new (unused) cation is used. Exchange resin, new (unused) anion exchange resin, and multiple types of anion exchange resins with different degree of deterioration (decrease) in ion exchange performance (capacity) as a result of being used in the condensate demineralizer of a power plant. The MTC value of these anion exchange resins is prepared, and the MTC value thereof is accurately obtained by the above-mentioned "MTC value calculation method".

Next, the anion exchange resin was regenerated using NaOH as an alkali regenerant,
After that, a predetermined amount of hydrochloric acid is passed through the regenerated anion exchange resin to obtain a regenerated ion exchange resin having a constant ratio (%) in contact with the acid regenerant of the anion exchange resin described in FIG. Anion exchange resin column 20 simulating the desalting tower shown in FIG. 5 was packed as a mixed ion exchange resin 21 in which an anion exchange resin having an MTC value and a new cation exchange resin previously regenerated with hydrochloric acid were separately mixed. Then, while passing pure water from the upper part of the column 20 at a predetermined SV, a part of the discharged water is guided to an ion chromatographic analyzer, and 120 minutes have elapsed from the start of pure water flow, and a state called a so-called constant leak was obtained. When it reaches, the amount of anions (Cl ⁻ ) contained in the discharged water is measured.

This operation was carried out by using R-Cl as an anion exchange resin.
^- 0%, 5%, 10%, 15%, 20%, 25%, 3
Perform 0% respectively. FIG. 11 shows, as an example above, each of the above R- in the case of MTC value 1.6 × 10 ⁻⁴ m / sec.
Anions leaking from Cl% anion exchange resin (Cl
^- ) Shows the change over time when the amount is measured. As described above, after a plurality of anion exchange resins having known MTC values (four types in this example) were regenerated, the amount of Cl ^- leakage after 120 minutes of passing pure water (performance evaluation water) was R-Cl. FIG. 12 is a summary of the data obtained from these results and obtained from these results. As a result, each RC
Correlation data between the amount of leaked Cl ⁻ and the MTC value is obtained for each 1%.

FIG. 13 shows the case where pure water is blown into the desalination tower of the condensate demineralizer of an actual power plant under the same conditions as for obtaining the correlation data between the leaked Cl ⁻ amount and the MTC value explained above. It shows the result of measuring the change in the amount of leaked Cl ⁻ from the start of water flow, and C at the time of 120 minutes after the start of water flow.
It can be seen that the MTC value can be estimated by detecting the l ^- leakage amount and comparing the detected value with the correlation data in FIG.

[0097]

EFFECTS OF THE INVENTION According to the present invention, the degree of deterioration over time of conventional anion exchange resins, which are either industrially insufficient or required to be further improved, can be determined, and in advance, the replacement time can be predicted. There is an effect that it is possible to provide a method and a device that can perform accurate measurement.

Further, according to the present invention, the performance of the anion exchange resin actually used in the ion exchange device such as the condensate demineralizer can be evaluated in-line without taking it out from the device. There is an effect that it is possible to provide a method and an apparatus that eliminates the labor and time of measurement work.

Further, according to the present invention, by performing the performance evaluation in the apparatus (in-line), it is possible to reduce the influence of the difference in the performance deterioration due to the particle size distribution of the resin, etc., and perform the accurate and highly accurate performance evaluation and the like. There is an effect.

Furthermore, according to the present invention, in particular, the restoration is carried out by being attached to various actual power generation facilities which are individually designed in actual devices for various reasons and, as a result, have different structures and different operating conditions. Accurately determine the performance of the anion exchange resin in the water desalination equipment and the performance of the anion exchange resin by reducing or eliminating the influence of the elements unique to each facility that is operated individually. There is an effect that can be evaluated and judged, effective use of ion exchange resin,
It is possible to reduce the amount of waste.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a schematic configuration of an ion exchange apparatus having a configuration for carrying out the method of the present invention.

FIG. 2 is a diagram showing a regeneration tower for explaining an example of an operation of a regeneration process.

FIG. 3 is a diagram showing a schematic configuration of a signal processing device for carrying out the method of the present invention.

FIG. 4 is a flowchart showing an example of the operation of FIG.

FIG. 5 is a diagram showing a simulated test device for measuring the amount of leakage of SO ₄ ²⁻ using an anion exchange resin having a known MTC value.

FIG. 6 is a diagram showing an example of the results of the test of FIG. 5, in which the horizontal axis is time and the vertical axis is a semilogarithmic graph showing the amount of SO ₄ ions leaked in the treated water.

FIG. 7 is a view showing correlation data of MTC value and SO ₄ ^2- leakage amount for each R-SO ₄ %.

FIG. 8 is a diagram showing an example of measurement of a leakage amount of SO ₄ ^{2− in an} actual machine.

FIG. 9 is a diagram showing an example of a determination method when predicting the exchange time of anion exchange resin, in which the horizontal axis represents the water flow cycle (day) and the vertical axis represents the MTC value measured for each regeneration treatment. It is a graph.

FIG. 10 is a diagram showing the relationship between the position of the separation surface formed in the regeneration tower and the produced R—SO ₄ %.

FIG. 11 is a diagram showing an example of a result of a test for measuring a Cl ⁻ leakage amount using an anion exchange resin having a known MTC value, the horizontal axis represents time, and the vertical axis represents SO ₄ ion leakage amount in treated water. It is a semi-logarithmic graph showing.

FIG. 12 is a view showing correlation data of MTC value and Cl ⁻ leakage amount by R-Cl%.

FIG. 13 is a diagram showing a measurement example of Cl ⁻ leakage amount in an actual machine.

[Explanation of Codes] 1: Demineralization tower 2: Mixed ion exchange resin 3: Inlet valve 4: Condensate inflow pipe 5: Outlet valve 6: Condensate outflow pipe 7: Regeneration tower 8: Resin storage tanks 9, 10, 11: Resin Transfer pipe 12: Pure water supply pipe 13: Ion chromatographic analyzer 14: Water supply pipe 15: Normally closed valve 16: Operation control device 20: Column 21: Mixed ion exchange resin 161: Main operation device 162: External input device 163: Storage (recording) device 164: Display means 165: Life prediction calculation device 166: Display means 701: Tower 702: Cation exchange resin 703: Anion exchange resin 704: Reference separation surface 705: Collector 706: Certain range

Front page continuation (72) Inventor Tetsuyuki Honda 5-5-16 Hongo, Bunkyo-ku, Tokyo Within Organo Co., Ltd. (56) Reference JP-A-4-220562 (JP, A) JP-A-2-253159 (JP, A) JP-A-5-212299 (JP, A) JP-A-8-348019 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01N 30/96 B01J 47 / 14 G01N 30/00 G01N 33/44

Claims (16)

(57) [Claims] 1. A mass transfer coefficient of the anion exchange resin (based on the measured value obtained by passing the water for performance evaluation through the regenerated anion exchange resin and measuring the amount of anions leaking into the water for performance evaluation). A method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus, which comprises estimating an MTC value. 2. An apparatus comprising a water passage system provided to remove impurity ions with an anion exchange resin, and a regeneration system for regenerating the anion exchange resin by chemicals and returning it to the water passage system. Performance evaluation water is passed through the exchange resin, and the mass transfer coefficient (MTC) value of the anion exchange resin is estimated based on the measured value obtained by measuring the amount of anions leaking into the water. A method for evaluating the performance of an anion exchange resin used in an ion exchange device. 3. An apparatus having a water passage system provided to remove impurity ions by an anion exchange resin and a cation exchange resin, and a regeneration system for regenerating at least a cation exchange resin by chemicals, in which cation exchange is performed after the regeneration treatment. Mixing resin and anion exchange resin Performance evaluation water is passed through the ion exchange resin, and the mass transfer coefficient of the anion exchange resin based on the measured value of the leaked anion amount obtained by measuring the amount of anions leaked into the water. A method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus, which comprises estimating a (MTC) value. 4. The method according to any one of claims 1 to 3,
Performance evaluation of water passing through anion exchange resin Performance evaluation of anion exchange resin used in an ion exchange device characterized in that pure water containing no ions, high-purity water such as ultrapure water, or condensed water Method. 5. The method according to any one of claims 2 to 4,
A method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus, which comprises returning the ion-exchange resin after the regeneration treatment to a water-passing system, and then passing water for performance evaluation. 6. The method according to any one of claims 1 to 5,
The mass transfer coefficient (MTC) value is estimated by preparing a plurality of anion exchange resins having known mass transfer coefficient values and different values, and passing water for performance evaluation for each of these anion exchange resins. Therefore, the mass transfer coefficient value is different for each anion exchange resin, the correlation between the value of the mass transfer coefficient and the measured value of the amount of anions leaked into the performance evaluation water is preliminarily investigated, and both correlation data are obtained in advance. From the measured value of the amount of anions leaked when water is passed through the anion exchange resin to be measured for performance evaluation, the mass transfer coefficient of the anion exchange resin to be measured (based on the correlation data obtained in advance). A method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus, which comprises estimating an MTC value. 7. The anion exchange according to claim 6, wherein the correlation data between the value of the mass transfer coefficient of an anion exchange resin having a known mass transfer coefficient (MTC) value and the amount of anions leaking from the anion exchange resin are obtained. A method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus, characterized in that it was determined by the ratio (%) at which a part of the resin contacts the acid regenerant. 8. The anion exchange resin according to claim 6 or 7, wherein the correlation data between the value of the mass transfer coefficient of an anion exchange resin having a known mass transfer coefficient (MTC) value and the amount of anions leaking from the anion exchange resin is obtained. A performance evaluation method for an anion exchange resin used in an ion exchange apparatus, which is characterized in that it is determined for each time length until water is passed through after performance evaluation of the exchange resin after being regenerated. 9. The method according to claim 6, wherein
The mass transfer coefficient (MTC) value is estimated by the mass transfer coefficient (M
The calibration curve data showing the relationship between the leaked anion amount and the mass transfer coefficient (MTC) value was obtained in advance based on the correlation data between the TC) value and the leaked anion amount, and the performance evaluation water was passed through the anion exchange resin to be measured. The mass transfer coefficient (MTC) value of the anion exchange resin to be measured is obtained from the measured value of the leaked anion amount obtained at this time by using the calibration curve data. Performance evaluation method. 10. The method according to claim 1, wherein the amount of anion leaked from the anion exchange resin is measured when the change in the anion leak value contained in the water for performance evaluation is small. Is a method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus. 11. The method according to claim 1, wherein the amount of anion leaked from the anion exchange resin is measured after a predetermined time has passed since the performance evaluation water was started to pass through the anion exchange resin. A method for evaluating the performance of an anion exchange resin used in an ion exchange device, characterized in that it is the time point. 12. The anion exchange resin according to any one of claims 1 to 11, wherein a target of mass transfer coefficient (MTC) value estimation is an anion exchange resin used in a condensate desalination apparatus installed in a condensate circulation system of a power plant. Is a method for evaluating the performance of an anion exchange resin used in an ion exchange apparatus. 13. A mass transfer coefficient (MTC) value is known, and performance evaluation water is passed through a plurality of anion exchange resins having different values to measure the amount of anions leaked into the water. Mass transfer coefficient for each anion exchange resin (M
Recording means for recording the result of previously examining the correlation data between the TC) value and the amount of leaked anions, and a measuring means for measuring the amount of anions leaked into the performance evaluation water that has passed through the anion exchange resin after the regeneration treatment. An anion exchange resin performance evaluation apparatus, comprising: an arithmetic means for computing the measured mass transfer coefficient (MTC) value of the anion exchange resin from the measured anion amount and the recorded information of the recording means. 14. The determination means according to claim 13, wherein the mass transfer coefficient (MTC) value of the anion exchange resin obtained by the calculation means is compared with a predetermined MTC threshold value to determine the exchange time of the anion exchange resin. An apparatus for evaluating the performance of an anion exchange resin, comprising: 15. The correlation data according to claim 13 or 14, wherein a mass transfer coefficient (MTC) value for each anion exchange resin and an amount of anions leaked when water for performance evaluation is passed through each anion exchange resin. The recorded recording means is the ratio (%) at which a part of the anion exchange resin comes into contact with the acid regenerant.
An apparatus for evaluating the performance of an anion exchange resin, wherein correlation data is recorded separately and / or by the length of time until water is passed through the performance evaluation water after regeneration treatment. 16. The performance evaluation device for anion exchange resin according to claim 15, further comprising an external input means for specifying correlation data corresponding to the anion exchange resin to be measured.