Conductivity measuring device based on double measuring ranges and measuring method thereof

Abstract

The invention relates to the technical field of conductivity measurement, and discloses a double-range-based conductivity measurement device, which comprises a sample introduction electromagnetic valve, a high-range conductivity meter, a drainage electromagnetic valve, an isolation electromagnetic valve, a low-range conductivity meter, a drainage main valve, a measurement pipeline and a sampling pipe, wherein the measuring pipeline comprises a first measuring pipeline and a second measuring pipeline; each of the high-range conductivity meter and the low-range conductivity meter is provided with a conductivity data storage module and a remote signal transmission module; different conductivity values obtained through measurement are stored through a conductivity data storage module, and the washing step of the resin regeneration stage is adjusted according to the change trend of the conductivity; the conductivity of the regeneration tower is recorded in the whole process, and the washing step is adjusted according to the change trend of the conductivity; and different conductivity values are remotely transmitted to a center console through a remote signal transmission module, and are used as reference parameters for remotely controlling the resin regeneration tower and optimizing process parameters. A corresponding measurement method is also disclosed.

Description

Technical Field

[0001] The invention relates to the technical field of condensate polishing and water quality treatment optimization, and in particular to a conductivity measuring device based on a dual-range and a measuring method thereof. Background Art

[0002] With the continuous improvement of the capacity and parameters of thermal power plant units, higher requirements are put forward for the quality of water vapor. The quality of steam and water in the operation of the unit mainly relies on the condensate polishing operation to optimize the water quality. After the resin in the condensate polishing operation fails, it is usually regenerated in vitro. The regeneration steps are mainly divided into the transfer of the failed resin to the regeneration analysis system, the separation of the failed resin and the yin and yang resins, and the transfer of the separated resins to the yin and yang regeneration towers for regeneration. After the regeneration is qualified, the resins are mixed for standby use.

[0003] Among them, the regeneration stage of the anion and cation resins of the condensate polishing equipment is specifically divided into three specific steps: acid and alkali introduction-displacement-flushing. Taking the anion resin as an example, first use 2%-5% NaOH solution to exchange the anions on the failed resin. After the alkali solution regeneration is completed, in order to prevent the NaOH solution from contaminating the cationic resin in the next resin mixing operation, it is necessary to rinse the regeneration liquid in the resin with deionized water. The current steps are: low-flow displacement for 30-40 minutes, and then scrub-flushing cycle, that is, retain a certain amount of water to enter compressed air to scrub the resin, and then flush at a high flow rate for 10-15 minutes, and circulate until the drainage conductivity is ≤5μs / cm, and the flushing is completed. The same is true for the cationic resin. First, low-flow displacement, then circular scrubbing-flushing, try to rinse the hydrochloric acid regeneration solution. This step consumes a lot of deionized water, and scrubbing causes great wear on the resin.

[0004] In addition, in order to optimize the flushing effect, it is necessary to judge the flushing effect of the resin replacement, scrubbing and flushing process, so as to determine the best flushing sequence. Conductivity can conveniently measure the flushing effect. By analyzing the changes in the conductivity of the regeneration tower drainage and the consumption of desalted water during the flushing process, the flushing process that can achieve the best effect can be determined, thereby achieving water-saving and efficient flushing. However, to achieve this purpose, it is necessary to measure the conductivity of the entire process of replacement and flushing after resin regeneration. According to the characteristics of drainage after resin regeneration, during the replacement stage, the conductivity of the drainage from the regeneration tower is between 20000-60000μS / cm, and the measurement range of the conductivity meter needs to reach 100mS / cm. At the end of flushing, the drainage conductivity is ≤5μS / cm for flushing to be qualified, and the conductivity meter measurement accuracy needs to reach 0.5μS / cm. Therefore, the conductivity measurement of the entire process requires a conductivity meter with a large enough measurement range, and it should also be able to achieve accurate measurement of the low range.

[0005] The current conductivity measuring devices are unable to meet the above measurement requirements, and there is a technical demand for developing new conductivity measuring devices with multi-range and wide-range characteristics. Summary of the invention

[0006] The purpose of the present invention is to provide a conductivity measuring device based on a dual-range and a measuring method thereof, wherein a high-range online conductivity meter with a range of 100 mS / cm to 200 mS / cm and a low-range conductivity meter with a range of 100 μS / cm to 200 μS / cm are selected respectively, and by recording the conductivity of a regeneration tower throughout the entire process and counting the amount of regenerated water, the flushing step details of the resin regeneration stage can be adjusted according to the change trend of the conductivity, thereby achieving water-saving and efficient flushing in the overall regeneration process.

[0007] A first aspect of the present invention is to provide a conductivity measuring device based on a dual range, comprising:

[0008] An injection solenoid valve (1), a high-range conductivity meter (2), a drainage solenoid valve (3), an isolation solenoid valve (4), a low-range conductivity meter (5), a drainage main valve (6) and a measuring pipeline; wherein the measuring pipeline comprises a first measuring pipeline (71) and a second measuring pipeline (72);

[0009] One side of the injection solenoid valve (1) is connected to the water outlet of the regeneration tower drainage pipe, and the other end of the injection solenoid valve (1) is respectively connected to the drainage solenoid valve (3) and the isolation solenoid valve (4) through a first measuring pipeline (71), and the high-range conductivity meter (2) is arranged on the first measuring pipeline (71);

[0010] The drainage solenoid valve (3) is directly connected to the drainage main valve (6);

[0011] The isolation solenoid valve (4) is connected to the main drainage valve (6) via a second measuring pipeline (72);

[0012] The drainage solenoid valve (3) and the isolation solenoid valve (4) are connected in parallel to form two branches;

[0013] The high-range conductivity meter (2) and the low-range conductivity meter (5) both have a conductivity data storage module and a remote signal transmission module.

[0014] Preferably, the different conductivity values ​​measured by the high-range conductivity meter (2) and the low-range conductivity meter (5) are stored separately through the conductivity data storage module, so as to adjust the flushing steps in the resin regeneration stage according to the change trend of the conductivity, thereby achieving water-saving and efficient flushing in the overall regeneration process. The conductivity of the regeneration tower is recorded throughout the process, and the flushing steps are adjusted according to the change trend of the conductivity, thereby achieving water-saving and efficient flushing.

[0015] Preferably, different conductivity values ​​measured by the high-range conductivity meter (2) and the low-range conductivity meter (5) are remotely transmitted to a central control console via a remote signal transmission module, and serve as reference parameters for remotely controlling the working process of the resin regeneration tower and optimizing process parameters.

[0016] Preferably, the volume of the measuring pipeline is designed according to the volume of the measuring electrode and to meet the instrument measurement requirements.

[0017] Preferably, the change in conductivity of the discharged water in the drainage pipe of the regeneration tower is recorded throughout the entire process, and the amount of regenerated water is calculated based on the change in conductivity of the discharged water in the drainage pipe of the regeneration tower.

[0018] Preferably, the dual-range conductivity measuring device further comprises a regenerated water quantity measuring sensor; the regenerated water quantity measuring sensor is installed on the measuring pipeline where the main drain valve (6) is located, thereby measuring the total amount of hydrochloric acid regeneration solution and desalted water as the regenerated water quantity; or the regenerated water quantity measuring sensor is installed only on the desalted water input pipeline, thereby measuring the amount of desalted water transported to the hydrochloric acid regeneration solution as the regenerated water quantity.

[0019] Preferably, the high-range conductivity meter (2) is a high-range online conductivity meter with a range of 100ms / cm to 200mS / cm; and the low-range conductivity meter (5) is a low-range online conductivity meter with a range of 100μS / cm to 200μS / cm.

[0020] Preferably, the dual-range conductivity measuring device further comprises a sampling tube, which is arranged at the outlet of the regeneration tower drain pipe; the sampling tube is connected to the high-range conductivity meter (2) via the first measuring pipeline (71) and the sampling solenoid valve (1); one side of the high-range conductivity meter (2) is connected to the drain solenoid valve (3) and the drain main valve (6); and at the same time, the second measuring pipeline (72) is introduced outside the drain main valve (6), and the low-range conductivity meter (5) and the isolation solenoid valve (4) are connected via the second measuring pipeline (72).

[0021] Preferably, the diameter of the sampling tube is determined according to the volume of the measuring pipeline, and the diameter of the sampling tube is between 8 mm and 15 mm.

[0022] Preferably, the injection solenoid valve (1), the drainage solenoid valve (3), the isolation solenoid valve (4) and the drainage main valve (6) are all ball valves with acid and alkali resistance.

[0023] A second aspect of the present invention is to provide a conductivity measurement method based on the dual-range conductivity measurement device of the first aspect, comprising:

[0024] S1, based on determining that the condensate polishing equipment has entered the anion and cation resin regeneration stage, closing the injection solenoid valve (1); wherein the program control step sequence of the anion and cation resin regeneration stage is acid and alkali injection-displacement-flushing;

[0025] S2, based on determining the program control step to enter the replacement, that is, the alkaline solution is used to exchange the anions on the failed resin, the drainage solenoid valve (3) and the drainage main valve (6) are opened, the injection solenoid valve (1) is opened, the high-range conductivity meter (2) is put into operation, and the conductivity online data of the replacement stage is recorded by the high-range conductivity meter (2);

[0026] S3, real-time monitoring of the change of the online conductivity data in the replacement phase and the relationship between the online conductivity data in the replacement phase and the range of the low-range conductivity meter (5); when the online conductivity data in the replacement phase is less than the range of the low-range conductivity meter (5), the isolation solenoid valve (4) is opened and the drainage solenoid valve (3) is closed at the same time, the low-range conductivity meter (5) is put into operation, and the drainage conductivity change continues to be accurately measured and recorded; and the flushing steps are adjusted based on the drainage conductivity change, so as to achieve water-saving and efficient flushing;

[0027] S4, when the drainage conductivity of the water sample is ≤5μS / cm, the drainage main valve (6) and the injection solenoid valve (1) are closed, and after confirming that a certain amount of water sample is retained in the instrument corresponding to the conductivity measuring device, the instrument exits operation and waits for the next anion and cation resin regeneration stage before the instrument is put into operation.

[0028] Preferably, the adjusting the flushing steps based on the change in the drainage conductivity to achieve water-saving and efficient flushing includes:

[0029] (1) adjusting the scrubbing time and flushing time based on the change in the drainage conductivity and the accumulated experience of scrubbing and flushing, and determining different working conditions based on the adjusted scrubbing time and flushing time;

[0030] (2) performing statistics on water-saving effects in the replacement phase and the scrubbing-flushing phase for the different working conditions;

[0031] (3) evaluating the water-saving effect of the replacement phase and the scrubbing-flushing phase under different working conditions and performing flushing optimization; wherein the water-saving effect evaluation is performed based on current regeneration experience; and the flushing optimization includes optimizing the replacement-scrubbing sequence.

[0032] Preferably, the determining of different working conditions includes determining six working conditions according to the scrubbing time and the amount of flushing water; the six working conditions include: for working condition 1, the scrubbing time is 5 minutes, and the flushing time is 10 minutes; for working condition 2, the scrubbing time is 10 minutes, and the flushing time is 10 minutes; for working condition 3, the scrubbing time is 15 minutes, and the flushing time is 10 minutes; for working condition 4, the scrubbing time is 5 minutes, and the flushing time is 15 minutes; for working condition 5, the scrubbing time is 10 minutes, and the flushing time is 15 minutes; for working condition 6, the scrubbing time is 15 minutes, and the flushing time is 15 minutes.

[0033] Preferably, the water-saving effect statistics and evaluation include replacement time, scrubbing-rinsing time, starting conductivity, end conductivity, desalted water volume, stage conductivity change and unit water conductivity change; wherein:

[0034] Conductivity change in stage = (conductivity at the start point - conductivity at the end point) / 5;

[0035] Change in conductivity per unit water volume = (starting conductivity - end conductivity) / amount of desalted water in this stage.

[0036] Preferably, the flushing optimization comprises:

[0037] Carry out water-saving optimization of replacement time: the optimization index is the stage conductivity change index; take 5 minutes replacement as the statistical stage, and the conductivity change in the replacement stage is less than the average conductivity change in the previous stage * 0.65, then the replacement stage ends;

[0038] Water saving optimization is performed in the scrubbing-flushing stage: the change in conductivity per unit water volume of the six working conditions is used as an evaluation index, and the working condition with the largest change in conductivity per unit water volume is selected as the optimal working condition for the scrubbing-flushing stage.

[0039] Beneficial effects of the device and the measuring method of the present invention:

[0040] A high-range online conductivity meter with a measuring range of 100mS / cm to 200mS / cm and a low-range conductivity meter with a measuring range of 100μS / cm-200μS / cm are selected respectively. By recording the conductivity of the regeneration tower throughout the entire process and counting the amount of regenerated water, the details of the flushing steps in the resin regeneration stage can be adjusted according to the changing trend of conductivity, thereby achieving water-saving and efficient flushing in the overall regeneration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the structure principle of a conductivity measuring device based on a dual-range according to an embodiment of the present invention;

[0043] Figure 2 The present invention is a flow chart of a measurement method based on a dual-range conductivity measurement device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Embodiment 1

[0048] See also Figure 1 This embodiment provides a conductivity measurement device based on a dual-range, including:

[0049] Injection solenoid valve 1, high-range conductivity meter 2, drainage solenoid valve 3, isolation solenoid valve 4, low-range conductivity meter 5, drainage main valve 6 and measuring pipeline; wherein: the measuring pipeline includes a first measuring pipeline 71 and a second measuring pipeline 72;

[0050] One side of the injection solenoid valve 1 is connected to the water outlet of the regeneration tower drain pipe, and the other end of the injection solenoid valve 1 is connected to the drain solenoid valve 3 and the isolation solenoid valve 4 respectively through the first measuring pipeline 71, and a high-range conductivity meter 2 is arranged on the first measuring pipeline 71;

[0051] The drainage solenoid valve 3 is directly connected to the drainage main valve 6;

[0052] The isolation solenoid valve 4 is connected to the drain main valve 6 via the second measuring pipeline 72;

[0053] The drainage solenoid valve 3 and the isolation solenoid valve 4 are connected in parallel to form two branches;

[0054] The high-range conductivity meter 2 and the low-range conductivity meter 5 both have a conductivity data storage module and a remote signal transmission module.

[0055] In this embodiment, the conductivity data storage module stores different conductivity values ​​measured by the high-range conductivity meter 2 and the low-range conductivity meter 5, respectively, so as to adjust the flushing steps in the resin regeneration stage according to the change trend of the conductivity, thereby achieving water-saving and efficient flushing in the overall regeneration process. The conductivity of the regeneration tower is recorded throughout the process, and the flushing steps are adjusted according to the change trend of the conductivity, thereby achieving water-saving and efficient flushing.

[0056] In this embodiment, different conductivity values ​​measured by the high-range conductivity meter 2 and the low-range conductivity meter 5 are remotely transmitted to the central control console through the remote signal transmission module as reference parameters for remotely controlling the working process of the resin regeneration tower and optimizing process parameters.

[0057] In this embodiment, the volume of the measuring pipeline is designed according to the volume of the measuring electrode and to meet the measurement requirements of the instrument.

[0058] In this embodiment, the change of the conductivity of the discharged water in the drainage pipe of the regeneration tower is recorded throughout the whole process, and the amount of regenerated water is calculated based on the change of the conductivity of the discharged water in the drainage pipe of the regeneration tower.

[0059] In this embodiment, the dual-range conductivity measuring device also includes a regenerated water volume measuring sensor; the regenerated water volume measuring sensor is installed on the measuring pipeline where the main drain valve 6 is located, so as to measure the total amount of hydrochloric acid regeneration solution and desalted water as the regenerated water volume; or the regenerated water volume measuring sensor is only installed on the desalted water input pipeline, so as to measure the amount of desalted water transported to the hydrochloric acid regeneration solution as the regenerated water volume.

[0060] As a preferred embodiment, the high-range conductivity meter 2 is a high-range online conductivity meter with a range of 100ms / cm to 200mS / cm; the low-range conductivity meter 5 is a low-range online conductivity meter with a range of 100μS / cm-200μS / cm.

[0061] As a preferred embodiment, the dual-range conductivity measuring device also includes a sampling tube, which is arranged at the outlet of the regeneration tower drain pipe; the sampling tube is connected to the high-range conductivity meter 2 through the first measuring pipeline 71 and the sampling solenoid valve 1, and one side of the high-range conductivity meter 2 is connected to the drain solenoid valve 3 and the drain main valve 6. At the same time, a second measuring pipeline 72 is introduced outside the drain main valve 6, and the low-range conductivity meter 5 and the isolation solenoid valve 4 are connected through the second measuring pipeline 72.

[0062] As a preferred embodiment, the diameter of the sampling tube is determined according to the volume of the measuring pipeline, and the diameter of the sampling tube is between 8 mm and 15 mm.

[0063] The regeneration tower in the prior art is usually provided with a sampling tube, but the conductivity measuring instrument configured for the sampling tube is usually a low-range conductivity meter with a certain range limit. The current operation is to close the conductivity injection door in advance and then put the conductivity meter into operation. However, it is still easy to cause damage to the low-range conductivity meter in a short time.

[0064] As a preferred embodiment, the injection solenoid valve 1, the drainage solenoid valve 3, the isolation solenoid valve 4 and the drainage main valve 6 are all ball valves with acid and alkali resistance.

[0065] Embodiment 2

[0066] See also Figure 2 This embodiment provides a conductivity measurement method based on the dual-range conductivity measurement device of the first aspect, comprising:

[0067] S1, based on determining that the condensate polishing equipment has entered the anion and cation resin regeneration stage, close the injection solenoid valve 1; wherein the program control steps of the anion and cation resin regeneration stage are acid and alkali injection-displacement-flushing;

[0068] In this embodiment, after the injection solenoid valve 1 is opened in step S1 , the injection solenoid valve 1 is kept open until the injection solenoid valve 1 is closed after the flushing is completed in step S4 .

[0069] S2, based on the determined program control step sequence, enter the replacement, that is, the anions on the failed resin are exchanged by the alkaline solution, the drainage solenoid valve 3 and the drainage main valve 6 are opened, the injection solenoid valve 1 is opened, the high-range conductivity meter 2 is put into operation, and the conductivity online data of the replacement stage is recorded by the high-range conductivity meter 2;

[0070] S3, real-time monitoring of the change of online conductivity data in the replacement stage and the relationship between the online conductivity data in the replacement stage and the range of the low-range conductivity meter 5, when the online conductivity data in the replacement stage is less than the range of the low-range conductivity meter 5, the isolation solenoid valve 4 is opened and the drainage solenoid valve 3 is closed, the low-range conductivity meter 5 is put into operation, and the change of drainage conductivity continues to be accurately measured and recorded; and the flushing steps are adjusted based on the change of drainage conductivity, so as to achieve water-saving and efficient flushing;

[0071] S4, when the drainage conductivity of the water sample is ≤5μS / cm, close the main drainage valve 6 and the injection solenoid valve 1. After confirming that a certain amount of water sample is retained in the instrument corresponding to the conductivity measuring device, the instrument exits operation and waits for the next anion and cation resin regeneration stage before the instrument is put into operation.

[0072] As a preferred embodiment, the flushing step is adjusted based on the change in the drainage conductivity to achieve water-saving and efficient flushing, including:

[0073] (1) adjusting the scrubbing time and flushing time based on the change in the drainage conductivity and the accumulated experience of scrubbing and flushing, and determining different working conditions based on the adjusted scrubbing time and flushing time;

[0074] As a preferred embodiment, the determining of different working conditions includes determining six working conditions according to the scrubbing time and the flushing water volume.

[0075] As shown in Table 1, for working condition 1, the scrubbing time is 5 minutes and the rinsing time is 10 minutes; for working condition 2, the scrubbing time is 10 minutes and the rinsing time is 10 minutes; for working condition 3, the scrubbing time is 15 minutes and the rinsing time is 10 minutes; for working condition 4, the scrubbing time is 5 minutes and the rinsing time is 15 minutes; for working condition 5, the scrubbing time is 10 minutes and the rinsing time is 15 minutes; for working condition 6, the scrubbing time is 15 minutes and the rinsing time is 15 minutes.

[0076] Table 1

[0077]

[0078]

[0079] (2) performing statistics on water-saving effects in the replacement phase and the scrubbing-flushing phase for the different working conditions;

[0080] The standard water-saving effect statistics and evaluation table is shown in Table 2.

[0081] As shown in Table 2, the water-saving effect statistics and evaluation include replacement time, scrubbing-rinsing time, starting conductivity, end conductivity, desalted water volume, stage conductivity change, and unit water conductivity change; wherein:

[0082] Conductivity change in stage = (conductivity at the start point - conductivity at the end point) / 5;

[0083] Change in conductivity per unit water volume = (beginning conductivity - end conductivity) / desalted water volume in this stage;

[0084] Table 2

[0085]

[0086] (3) evaluating the water-saving effect of the replacement phase and the scrubbing-flushing phase under the different working conditions and performing flushing optimization; wherein the water-saving effect evaluation is performed based on the current regeneration experience; the flushing optimization includes optimizing the replacement-scrubbing step sequence; and comprising:

[0087] Carry out water-saving optimization of replacement time: the optimization index is the stage conductivity change index; take 5 minutes replacement as the statistical stage, and the conductivity change in the replacement stage is less than the average conductivity change in the previous stage * 0.65, then the replacement stage ends;

[0088] Water saving optimization is performed in the scrubbing-flushing stage: the change in conductivity per unit water volume of the six working conditions is used as an evaluation index, and the working condition with the largest change in conductivity per unit water volume is selected as the optimal working condition for the scrubbing-flushing stage.

[0089] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above embodiments can be implemented by software, or by means of software plus necessary general hardware platforms. Based on such understanding, the technical solutions of the above embodiments can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A conductivity measuring device based on a dual range, characterized in that: include: An injection solenoid valve (1), a high-range conductivity meter (2), a drainage solenoid valve (3), an isolation solenoid valve (4), a low-range conductivity meter (5), a drainage main valve (6) and a measuring pipeline; wherein the measuring pipeline comprises a first measuring pipeline (71) and a second measuring pipeline (72); One side of the injection solenoid valve (1) is connected to the water outlet of the regeneration tower drainage pipe, and the other end of the injection solenoid valve (1) is respectively connected to the drainage solenoid valve (3) and the isolation solenoid valve (4) through a first measuring pipeline (71), and the high-range conductivity meter (2) is arranged on the first measuring pipeline (71); The drainage solenoid valve (3) is directly connected to the drainage main valve (6); The isolation solenoid valve (4) is connected to the main drainage valve (6) via a second measuring pipeline (72); The drainage solenoid valve (3) and the isolation solenoid valve (4) are connected in parallel to form two branches; The high-range conductivity meter (2) and the low-range conductivity meter (5) both have a conductivity data storage module and a remote signal transmission module; The different conductivity values ​​measured by the high-range conductivity meter (2) and the low-range conductivity meter (5) are stored respectively through the conductivity data storage module, so as to adjust the flushing steps in the resin regeneration stage according to the change trend of the conductivity; the conductivity of the regeneration tower is recorded throughout the process, and the flushing steps are adjusted according to the change trend of the conductivity, so as to achieve water-saving and efficient flushing; The different conductivity values ​​measured by the high-range conductivity meter (2) and the low-range conductivity meter (5) are remotely transmitted to the central control console via a remote signal transmission module as reference parameters for remotely controlling the working process of the resin regeneration tower and optimizing process parameters; The dual-range conductivity measuring device further comprises a sampling tube, which is arranged at the outlet of the regeneration tower drainage pipe; the sampling tube is connected to the high-range conductivity meter (2) via the first measuring pipeline (71) and the sampling solenoid valve (1); one side of the high-range conductivity meter (2) is connected to the drainage solenoid valve (3) and the drainage main valve (6); and the second measuring pipeline (72) is introduced outside the drainage main valve (6); the low-range conductivity meter (5) and the isolation solenoid valve (4) are connected via the second measuring pipeline (72).

2. A conductivity measuring device based on dual range according to claim 1, characterized in that: The high-range conductivity meter (2) is a high-range online conductivity meter with a range of 100ms / cm to 200mS / cm; the low-range conductivity meter (5) is a low-range online conductivity meter with a range of 100μS / cm to 200μS / cm.

3. A conductivity measuring device based on dual range according to claim 1, characterized in that: The injection solenoid valve (1), the drainage solenoid valve (3), the isolation solenoid valve (4) and the drainage main valve (6) are all ball valves with acid and alkali resistance.

4. A conductivity measuring device based on dual range according to claim 1, characterized in that: The dual-range conductivity measuring device further comprises a regenerated water quantity measuring sensor; the regenerated water quantity measuring sensor is installed on the measuring pipeline where the main drain valve (6) is located, thereby measuring the total amount of hydrochloric acid regeneration solution and desalted water as the regenerated water quantity; or the regenerated water quantity measuring sensor is installed only on the desalted water input pipeline, thereby measuring the amount of desalted water transported to the hydrochloric acid regeneration solution as the regenerated water quantity.

5. A dual-range conductivity measuring device according to any one of claims 1 to 4, characterized in that: The diameter of the sampling tube is determined according to the volume of the measuring pipeline, and the diameter of the sampling tube is between 8 mm and 15 mm.

6. A conductivity measurement method based on the dual-range conductivity measurement device according to any one of claims 1 to 5, characterized in that: include: S1, based on determining that the condensate polishing equipment has entered the anion and cation resin regeneration stage, closing the injection solenoid valve (1); wherein the program control step sequence of the anion and cation resin regeneration stage is acid and alkali injection-displacement-flushing; S2, based on determining the program control step to enter the replacement, that is, the alkaline solution is used to exchange the anions on the failed resin, the drainage solenoid valve (3) and the drainage main valve (6) are opened, the injection solenoid valve (1) is opened, the high-range conductivity meter (2) is put into operation, and the conductivity online data of the replacement stage is recorded by the high-range conductivity meter (2); S3, real-time monitoring of the change of the online conductivity data in the replacement phase and the relationship between the online conductivity data in the replacement phase and the range of the low-range conductivity meter (5); when the online conductivity data in the replacement phase is less than the range of the low-range conductivity meter (5), the isolation solenoid valve (4) is opened and the drainage solenoid valve (3) is closed at the same time, the low-range conductivity meter (5) is put into operation, and the drainage conductivity change continues to be accurately measured and recorded; and the flushing steps are adjusted based on the drainage conductivity change, so as to achieve water-saving and efficient flushing; S4, when the drainage conductivity of the water sample is ≤5μS / cm, the drainage main valve (6) and the injection solenoid valve (1) are closed, and after confirming that a certain amount of water sample is retained in the instrument corresponding to the conductivity measuring device, the instrument exits operation and waits for the next anion and cation resin regeneration stage before the instrument is put into operation.

7. The conductivity measurement method based on the dual-range conductivity measurement device according to claim 6, characterized in that: The method of adjusting the flushing steps based on the change in the drainage conductivity to achieve water-saving and efficient flushing includes: (1) adjusting the scrubbing time and flushing time based on the change in the drainage conductivity and the accumulated experience of scrubbing and flushing, and determining different working conditions based on the adjusted scrubbing time and flushing time; (2) performing statistics on water-saving effects in the replacement phase and the scrubbing-flushing phase for the different working conditions; (3) evaluating the water-saving effect of the replacement phase and the scrubbing-flushing phase under different working conditions and performing flushing optimization; wherein the water-saving effect evaluation is performed based on current regeneration experience; and the flushing optimization includes optimizing the replacement-scrubbing sequence.

8. The conductivity measurement method based on the dual-range conductivity measurement device according to claim 7, characterized in that: The determining of different working conditions includes determining six working conditions according to the scrubbing time and the amount of flushing water; the six working conditions include: for working condition 1, the scrubbing time is 5 minutes and the flushing time is 10 minutes; for working condition 2, the scrubbing time is 10 minutes and the flushing time is 10 minutes; for working condition 3, the scrubbing time is 15 minutes and the flushing time is 10 minutes; for working condition 4, the scrubbing time is 5 minutes and the flushing time is 15 minutes; for working condition 5, the scrubbing time is 10 minutes and the flushing time is 15 minutes; for working condition 6, the scrubbing time is 15 minutes and the flushing time is 15 minutes.

9. The conductivity measurement method based on the dual-range conductivity measurement device according to claim 8, characterized in that: The water-saving effect statistics and evaluation include replacement time, scrubbing-rinsing time, starting conductivity, end conductivity, desalted water volume, stage conductivity change and unit water conductivity change; wherein: Conductivity change in stage = (conductivity at the start point - conductivity at the end point) / 5; Change in conductivity per unit water volume = (starting conductivity - end conductivity) / amount of desalted water in this stage.

10. The conductivity measurement method based on the dual-range conductivity measurement device according to claim 9, characterized in that: The flushing optimization comprises: Carry out water-saving optimization of replacement time: the optimization index is the stage conductivity change index; take 5 minutes replacement as the statistical stage, and the conductivity change in the replacement stage is less than the average conductivity change in the previous stage * 0.65, then the replacement stage ends; Water saving optimization is performed in the scrubbing-flushing stage: the change in conductivity per unit water volume of the six working conditions is used as an evaluation index, and the working condition with the largest change in conductivity per unit water volume is selected as the optimal working condition for the scrubbing-flushing stage.

Images