Method, device and system for determining breakthrough countdown of polishing mixed bed

Abstract

The application provides a method, device and system for determining a breakthrough countdown of a polishing mixed bed, which can actively monitor the operation state of the mixed bed, enables an operator to understand the operation state of each polishing mixed bed, and is beneficial to the operator to reasonably arrange the regeneration work of the failed mixed bed. Moreover, when the condenser leaks, whether to immediately put in the regenerated mixed bed can be decided according to the operation state of the mixed bed, so as to avoid the impurities leaked from the condenser from penetrating the polishing mixed bed and causing corrosion, scaling and salt accumulation hazards to the water vapor system.

Description

Technical Field

[0001] This invention relates to the field of condensate polishing technology, and more specifically, to a method, apparatus, and system for determining the breakthrough countdown of a mixed bed for polishing. Background Technology

[0002] During the steam-water circulation process of a thermal power generating unit, if the condenser experiences leaks of varying degrees, or if the unit restarts, the condensate water will be contaminated by various impurities. To remove these contaminants, condensate water fine treatment is necessary. The core of this fine treatment system is a mixed-bed ion exchanger. Since the main impurity in condensate is ammonia, its concentration is hundreds of times higher than other salts. Therefore, the cation exchanger in the mixed bed always fails before the anion exchanger, and the pH of the solution gradually changes from neutral to alkaline, at which point the anion exchanger also loses its ability to exchange anions in the water. This marks the end of the hydrogen-type operation of the mixed bed, requiring timely removal of the failed mixed bed and reactivation of a regenerated one.

[0003] Currently, monitoring of mixed bed failure is mainly carried out using conductivity meters, hydrogen conductivity meters, or pH meters of the mixed bed effluent. This is a passive monitoring method after failure and lacks timeliness. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a method for determining the breakthrough countdown of a mixed bed in a fine treatment process. The method includes: acquiring real-time operating parameters and design parameters of the mixed bed; the real-time operating parameters include at least one of the following: mixed bed inlet conductivity and mixed bed inlet instantaneous flow rate; the design parameters include at least one of the following: total cation resin volume, cation resin exchange capacity, resin attenuation coefficient, resin regeneration coefficient, and breakthrough balance coefficient; inputting the real-time operating parameters and the design parameters into a mixed bed breakthrough countdown model to obtain the remaining hydrogen-form cation resin volume, remaining water production capacity, and breakthrough countdown; the mixed bed breakthrough countdown model includes a remaining hydrogen-form cation resin volume calculation module, a remaining water production capacity calculation module, and a breakthrough countdown calculation module.

[0005] Optionally, the remaining hydrogen-form cation exchange resin volume calculation module includes the following calculation formula:

[0006]

[0007] The remaining water production calculation module includes the following calculation formula:

[0008]

[0009] The penetration countdown calculation module includes the following calculation formulas:

[0010]

[0011] Where E is the working exchange capacity of the cation exchange resin, and V c Let Q be the total volume of the cation exchange resin, a be the resin attenuation coefficient, b be the resin regeneration coefficient, and d be the resin breakthrough coefficient. s C represents the average inlet flow rate of the mixed bed, t represents the time period corresponding to the average flow rate, and C represents the average inlet flow rate. s C represents the average ammonia concentration at the inlet of the mixed bed. 实 Q represents the real-time ammonia concentration at the inlet of the mixed bed. 实 This represents the real-time traffic at the mixed bed inlet.

[0012] Optionally, the method further includes displaying the remaining hydrogen-form cation resin volume, the remaining water production capacity, and the breakthrough countdown on the operation control screen of the fine treatment mixed bed.

[0013] Optionally, the method further includes displaying the remaining hydrogen-form cation resin and the failed resin in different colors on the operation control screen.

[0014] Optionally, the time period t ranges from 5 to 6000 s; or, the resin attenuation coefficient a ranges from 0.5 to 1.5; or, the resin regeneration coefficient b ranges from 0.5 to 1.5; or, the resin penetration coefficient d ranges from 0.5 to 1.5.

[0015] Optionally, the formulas for calculating the ammonia concentration C and conductivity SC are as follows:

[0016]

[0017] Optionally, the method further includes: determining the ammonia concentration at the mixed bed inlet based on the real-time acquired conductivity of the mixed bed inlet and a preset ammonia concentration and conductivity calculation formula.

[0018] This invention provides a device for determining the breakthrough countdown of a mixed bed in a fine treatment process. The device includes: a parameter acquisition module for acquiring real-time operating parameters and design parameters of the mixed bed; the real-time operating parameters include at least one of the following: mixed bed inlet conductivity and mixed bed inlet instantaneous flow rate; the design parameters include at least one of the following: total cation resin volume, cation resin exchange capacity, resin attenuation coefficient, resin regeneration coefficient, and breakthrough balance coefficient; and a countdown determination module for inputting the real-time operating parameters and the design parameters into a mixed bed breakthrough countdown model to obtain the remaining hydrogen-form cation resin volume, remaining water production capacity, and breakthrough countdown; the mixed bed breakthrough countdown model includes a remaining hydrogen-form cation resin volume calculation module, a remaining water production capacity calculation module, and a breakthrough countdown calculation module.

[0019] This invention provides a system for determining the breakthrough countdown of a mixed bed in a fine treatment process. The system includes a mixed bed inlet conductivity meter, a mixed bed inlet flow meter, and a processor. Both the mixed bed inlet conductivity meter and the mixed bed inlet flow meter are installed in the mixed bed inlet water pipe. The mixed bed inlet water pipe connects to the mixed bed, and the mixed bed also has a mixed bed outlet water pipe. The mixed bed inlet conductivity meter is used to collect the mixed bed inlet conductivity, and the mixed bed inlet flow meter is used to collect the instantaneous flow rate at the mixed bed inlet. The processor stores a mixed bed breakthrough countdown model, which is used to obtain the remaining hydrogen-form cation resin volume, remaining water production capacity, and breakthrough countdown based on the input real-time operating parameters and design parameters.

[0020] Optionally, the system further includes a display device for displaying the remaining hydrogen-form cation resin and the failed resin in different colors.

[0021] This invention, through a mixed-bed penetration countdown model, can actively monitor the operating status of the mixed beds. This allows operators to understand the operating status of each fine-treatment mixed bed, facilitating the rational scheduling of regeneration work for failed mixed beds. Furthermore, when a condenser leaks, the operating status of the mixed beds can be used to decide whether to immediately put a regenerated mixed bed into operation, preventing impurities from the condenser leak from penetrating the fine-treatment mixed bed and causing corrosion, scaling, and salt accumulation in the steam-water system. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a simplified schematic diagram of the fine treatment mixed bed penetration countdown determination system provided in an embodiment of the present invention;

[0024] Figure 2 A flowchart illustrating a method for determining the breakthrough countdown of a fine-process mixed bed according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of a fine-treatment mixed bed penetration countdown determination device provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 111-Mixed bed inlet conductivity meter; 112-Mixed bed inlet flow meter; 113-Mixed bed inlet water pipe; 121-Mixed bed; 122-Resin failure layer; 123-Residual hydrogen form resin layer; 124-Mixed bed outlet water pipe; 301-Parameter acquisition module; 302-Countdown determination module. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] Figure 1 This is a simplified schematic diagram of a fine-treatment mixed-bed penetration countdown determination system provided in an embodiment of the present invention. Figure 1 The diagram shows the mixed bed inlet pipe 113, mixed bed 121, mixed bed inlet conductivity meter 111, mixed bed inlet flow meter 112, and mixed bed outlet pipe 124.

[0030] The mixed bed inlet water pipe 113 is sequentially equipped with a mixed bed inlet conductivity meter 111 and a mixed bed inlet flow meter 112. The mixed bed inlet water pipe 111 is connected to the mixed bed 121, and the mixed bed outlet water pipe 124 is connected to the mixed bed 121. The mixed bed 121 contains a resin failure layer 122 and a residual hydrogen form resin layer 123.

[0031] The mixed bed inlet conductivity meter 111 is used to collect the mixed bed inlet conductivity, and the mixed bed inlet flow meter 112 is used to collect the instantaneous flow rate at the mixed bed inlet. The fine treatment mixed bed breakthrough countdown determination system also includes a processor, which stores a mixed bed breakthrough countdown model. The mixed bed breakthrough countdown model is used to obtain the remaining hydrogen-type cation resin volume, remaining water production capacity, and breakthrough countdown based on the input real-time operating parameters and design parameters.

[0032] Optionally, the system further includes a display device; this display device is used to display the remaining hydrogen-form cation resin and the failed resin using different colors. For example... Figure 1 As shown, the remaining hydrogen-form resin layer 123 will be determined according to Q. 剩余 The real-time change height, and displays a different color from the resin failure layer (122) above.

[0033] Figure 2 This diagram illustrates a flow chart of a method for determining the breakthrough countdown in a mixed bed for fine treatment, provided by an embodiment of the present invention, comprising the following steps:

[0034] S202, obtain the real-time operating parameters and design parameters of the mixed bed.

[0035] The real-time operating parameters may include: the conductivity of the mixed bed inlet and the instantaneous flow rate of the mixed bed inlet. The design parameters may include: the total volume of the cation resin, the cation resin exchange capacity, the resin attenuation coefficient, the resin regeneration coefficient, and the breakthrough balance coefficient.

[0036] S202 inputs real-time operating parameters and design parameters into the mixed bed breakthrough countdown model to obtain the remaining hydrogen-type cation resin volume, remaining water production capacity, and breakthrough countdown.

[0037] The mixed bed breakthrough countdown model includes a module for calculating the volume of remaining hydrogen-type cation exchange resin, a module for calculating the remaining water production, and a module for calculating the breakthrough countdown.

[0038] Table 1 shows the input values ​​to the fine-processing input mixed-bed penetration countdown model. Table 2 shows the output values ​​to the fine-processing input mixed-bed penetration countdown model.

[0039]

[0040] Table 1

[0041]

[0042] Table 2

[0043] After obtaining the above results, the remaining hydrogen-form cation exchange resin volume, remaining water production capacity, and breakthrough countdown can be displayed on the operation control screen of the fine treatment mixed bed. To facilitate the distinction between exhausted resin and remaining hydrogen-form cation exchange resin, the remaining hydrogen-form cation exchange resin and exhausted resin can be displayed in different colors on the operation control screen.

[0044] For example, during the operation of the fine treatment mixed bed in a thermal power plant, the input quantities of the above model can be input into the corresponding calculation model to give the output quantities of the model, which are then displayed on the operation control screen of the fine treatment mixed bed.

[0045] Specifically, the model inputs include manually input signals such as the total volume of cation exchange resin, cation exchange capacity, resin decay coefficient, resin regeneration coefficient, and breakthrough balance coefficient, as well as automatically acquired signals such as the mixed bed inlet conductivity and instantaneous flow rate. Specifically, the model outputs include the remaining hydrogen-type cation resin volume, remaining water production capacity, and breakthrough countdown automatically calculated based on the mixed bed breakthrough countdown model.

[0046] The remaining hydrogen-form cation exchange resin volume calculation module includes the following calculation formula:

[0047]

[0048] The remaining water production calculation module includes the following calculation formulas:

[0049]

[0050] The penetration countdown calculation module includes the following calculation formulas:

[0051]

[0052] Where E is the working exchange capacity of the cation exchange resin, in mol / m³. 3 R;V c This refers to the total volume of the cation exchange resin, in cubic meters (m³). 3 a is the resin attenuation coefficient, b is the resin regeneration coefficient, d is the resin breakthrough coefficient, and Q is the resin penetration coefficient. s This represents the average inlet flow rate of the mixed bed, in cubic meters per second (m³). 3 / h; t is the time period corresponding to the average flow rate, in hours; C s The average ammonia concentration at the inlet of the mixed bed is expressed in mmol / L; C 实 Q represents the real-time ammonia concentration at the inlet of the mixed bed, in mmol / L. 实 This represents the real-time flow rate at the mixed bed inlet, expressed in μS / cm.

[0053] Optionally, the time period t ranges from 5 to 6000 s; or, the resin attenuation coefficient a ranges from 0.5 to 1.5; or, the resin regeneration coefficient b ranges from 0.5 to 1.5; or, the resin penetration coefficient d ranges from 0.5 to 1.5.

[0054] In the above model, the formulas for calculating the ammonia concentration C and the conductivity SC are as follows:

[0055]

[0056] Based on the above formulas for calculating ammonia concentration and conductivity, the ammonia concentration at the mixed bed inlet can be determined by real-time acquisition of the conductivity at the mixed bed inlet and the preset formulas for calculating ammonia concentration and conductivity.

[0057] Specifically, in this embodiment of the invention, the mixed bed can be a spherical mixed bed or a cylindrical mixed bed; the above model can be applied to a single mixed bed or multiple mixed beds.

[0058] Specifically, in this embodiment of the invention, the resin failure layer is above the remaining hydrogen-form resin layer, and the two can be marked with any color, as long as they are not the same color.

[0059] Specifically, in this embodiment of the invention, the time period corresponding to the average flow rate is between 5 and 6000 seconds, which can be set manually. Of course, the shorter the time period, the more accurate the calculated cumulative flow rate, but the greater the computational workload.

[0060] Specifically, in this embodiment of the invention, as the service life of the resin increases, the working exchange capacity of the resin will also decrease. Therefore, a resin attenuation coefficient a is set to be 0.5 to 1.5.

[0061] Specifically, in this embodiment of the invention, the proportion of hydrogen-form cation resin after resin regeneration may vary depending on the purity of the regenerated acid, alkali and other reagents, as well as the different operating states of the regeneration device. Therefore, a resin regeneration coefficient b is set to be 0.5 to 1.5.

[0062] Specifically, in this embodiment, different mixed bed outlet flow rates correspond to different flow velocities of the mixed bed inlet water, and the speed of penetration into the mixed bed will also vary. Therefore, a resin penetration coefficient d of 0.5 to 1.5 is set.

[0063] Specifically, in this embodiment, the mixed bed has a final resin layer. Because water has a certain flow rate, it penetrates the mixed bed before it can undergo ion exchange, leading to deviations in the calculation of remaining resin volume, water production, and other information. Therefore, a breakthrough balance coefficient is added for correction, so that the data calculated by the model incorporates the water flow rate parameter, making it more consistent with reality.

[0064] The fine-treatment mixed bed penetration countdown determination method provided in this invention can actively monitor the operating status of the mixed bed through a mixed bed penetration countdown model. This allows operators to understand the operating status of each fine-treatment mixed bed, facilitating the rational scheduling of regeneration work for failed mixed beds. Furthermore, when a condenser leaks, the operating status of the mixed bed can be used to decide whether to immediately put a regenerated mixed bed into operation, preventing impurities from the condenser leak from penetrating the fine-treatment mixed bed and causing corrosion, scaling, and salt accumulation in the steam-water system.

[0065] The fine treatment mixed bed penetration countdown determination method and device provided in this invention embodiment is a concrete manifestation of the digital transformation of traditional industrial technology and can be used as one of the specific modules of a smart power plant.

[0066] Figure 3 This diagram illustrates the structure of a fine-treatment mixed-bed penetration countdown determining device according to an embodiment of the present invention, showing that the device includes:

[0067] The parameter acquisition module 301 is used to acquire the real-time operating parameters and design parameters of the mixed bed. The real-time operating parameters include at least one of the following: the conductivity of the mixed bed inlet and the instantaneous flow rate of the mixed bed inlet. The design parameters include at least one of the following: the total volume of the cation resin, the cation resin exchange capacity, the resin attenuation coefficient, the resin regeneration coefficient, and the breakthrough balance coefficient.

[0068] The countdown determination module 302 is used to input real-time operating parameters and design parameters into the mixed bed breakthrough countdown model to obtain the remaining hydrogen cation resin volume, remaining water production capacity and breakthrough countdown. The mixed bed breakthrough countdown model includes a remaining hydrogen cation resin volume calculation module, a remaining water production capacity calculation module and a breakthrough countdown calculation module.

[0069] The fine treatment mixed bed penetration countdown determination device provided in this embodiment of the invention can actively monitor the operating status of the mixed bed through the mixed bed penetration countdown model, enabling operators to understand the operating status of each fine treatment mixed bed, which is beneficial for operators to reasonably arrange the regeneration work of failed mixed beds.

[0070] This invention also provides a system for determining the breakthrough countdown of a mixed bed in a fine treatment process, including a mixed bed inlet conductivity meter, a mixed bed inlet flow meter, and a processor; both the mixed bed inlet conductivity meter and the mixed bed inlet flow meter are installed in the mixed bed inlet water pipe; the mixed bed inlet water pipe is connected to the mixed bed, and the mixed bed is also provided with a mixed bed outlet water pipe; the mixed bed inlet conductivity meter is used to collect the mixed bed inlet conductivity, and the mixed bed inlet flow meter is used to collect the instantaneous flow rate at the mixed bed inlet; the processor stores a mixed bed breakthrough countdown model, which is used to obtain the remaining hydrogen-form cation resin volume, remaining water production capacity, and breakthrough countdown based on the input real-time operating parameters and design parameters.

[0071] Optionally, the system further includes a display device for displaying the remaining hydrogen-form cation resin and the failed resin in different colors.

[0072] This invention also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the processes described in the above embodiments and achieves the same technical effects. To avoid repetition, these will not be elaborated further here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0073] Of course, those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented by computer-controlled devices. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The storage medium can be a memory, a disk, an optical disk, etc.

[0074] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0076] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining the breakthrough countdown of a fine-treatment mixed bed, characterized in that, The method includes: Obtain the real-time operating parameters and design parameters of the mixed bed; the real-time operating parameters include at least one of the following: the conductivity of the mixed bed inlet and the instantaneous flow rate of the mixed bed inlet; the design parameters include at least one of the following: the total volume of the cation resin, the cation resin exchange capacity, the resin attenuation coefficient, the resin regeneration coefficient, and the breakthrough balance coefficient. The real-time operating parameters and the design parameters are input into the mixed bed breakthrough countdown model to obtain the remaining hydrogen-form cation resin volume, remaining water production capacity, and breakthrough countdown. The mixed bed breakthrough countdown model includes a remaining hydrogen-form cation resin volume calculation module, a remaining water production capacity calculation module, and a breakthrough countdown calculation module. The remaining hydrogen-form cation exchange resin volume calculation module includes the following calculation formulas: ； The remaining water production calculation module includes the following calculation formula: ； The penetration countdown calculation module includes the following calculation formulas: ； in, E The working exchange capacity of the cation exchange resin. V c This represents the total volume of the cation exchange resin. a The resin attenuation coefficient, b The resin regeneration coefficient is... d This represents the resin penetration coefficient. Q s The average flow rate at the mixed bed inlet. t The time period corresponding to the average flow rate. C s The average ammonia concentration at the inlet of the mixed bed. C 实 This refers to the real-time ammonia concentration at the inlet of the mixed bed. Q 实 This represents the real-time traffic at the mixed bed inlet.

2. The method according to claim 1, characterized in that, The method further includes: The remaining hydrogen-form cation exchange resin volume, the remaining water production capacity, and the breakthrough countdown are displayed on the operation control screen of the fine treatment mixed bed.

3. The method according to claim 2, characterized in that, The method further includes: The remaining hydrogen-form cation resin and the failed resin are displayed in different colors on the operation control screen.

4. The method according to claim 1, characterized in that, Time period t The value range is 5~6000s; or, The resin attenuation coefficient α ranges from 0.5 to 1.5; or, The resin regeneration coefficient b ranges from 0.5 to 1.5; or, The resin penetration coefficient d ranges from 0.5 to 1.

5.

5. The method according to claim 1, characterized in that, ammonia concentration C With conductivity SC The calculation formula is as follows: 。 6. The method according to claim 1, characterized in that, The method further includes: The ammonia concentration at the mixed bed inlet is determined based on the real-time conductivity of the mixed bed inlet and the preset ammonia concentration and conductivity calculation formula.

7. A device for determining the countdown timer for the penetration of a fine-process mixed bed, characterized in that, The apparatus, applicable to the method of any one of claims 1-6, comprises: The parameter acquisition module is used to acquire the real-time operating parameters and design parameters of the mixed bed; the real-time operating parameters include at least one of the following: the conductivity of the mixed bed inlet and the instantaneous flow rate of the mixed bed inlet; the design parameters include at least one of the following: the total volume of the cation resin, the cation resin exchange capacity, the resin attenuation coefficient, the resin regeneration coefficient, and the breakthrough balance coefficient. The countdown determination module is used to input the real-time operating parameters and the design parameters into the mixed bed breakthrough countdown model to obtain the remaining hydrogen-type cation resin volume, the remaining water production capacity, and the breakthrough countdown; the mixed bed breakthrough countdown model includes a remaining hydrogen-type cation resin volume calculation module, a remaining water production capacity calculation module, and a breakthrough countdown calculation module.

8. A fine-treatment mixed-bed penetration countdown determination system, characterized in that, The system having the apparatus of claim 7 includes a mixed bed inlet conductivity meter, a mixed bed inlet flow meter, and a processor; The conductivity meter at the inlet of the mixed bed and the flow meter at the inlet of the mixed bed are both installed in the water inlet pipe of the mixed bed; the water inlet pipe of the mixed bed is connected to the mixed bed, and the mixed bed is also provided with a water outlet pipe of the mixed bed; The mixed bed inlet conductivity meter is used to collect the mixed bed inlet conductivity, and the mixed bed inlet flow meter is used to collect the instantaneous flow rate at the mixed bed inlet. The processor stores a mixed bed breakthrough countdown model, which is used to obtain the remaining hydrogen-type cation resin volume, remaining water production capacity, and breakthrough countdown based on the input real-time operating parameters and design parameters.

9. The system according to claim 8, characterized in that, The system also includes a display device; The display device is used to display the remaining hydrogen-form cation resin and the failed resin in different colors.

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