Sample water control system for hydrogen conductivity measurement system and use method of sample water control system

Abstract

The invention provides a sample water control system for a hydrogen conductivity measurement system and a use method thereof, the sample water control system comprises a main electric regeneration ion exchanger and a standby electric regeneration ion exchanger, the main electric regeneration ion exchanger and the standby electric regeneration ion exchanger are respectively connected with a chemical sampling water pipeline; solenoid valves are arranged between the main electric regeneration ion exchanger and the chemical sampling water pipeline and between the standby electric regeneration ion exchanger and the chemical sampling water pipeline, the rear side of the main electric regeneration ion exchanger and the rear side of the standby electric regeneration ion exchanger are sequentially connected with a flow transmitter, a pressure transmitter and a first electric control valve, and the first electric control valve is connected with a hydrogen conductivity instrument. The two electric regeneration ion exchangers are used for replacing traditional cation exchange resin, when a control system judges that the measured value of a hydrogen conductivity instrument exceeds the standard or the change speed of the measured value exceeds the limit, the standby electric regeneration ion exchanger is automatically switched to operate, and whether the ion exchangers fail or the water quality exceeds the standard is judged according to the actual situation.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring equipment, and in particular to a water sample control system for a hydrogen conductivity measurement system and a use method thereof. Background Art

[0002] Hydrogen conductivity is a key indicator for monitoring and controlling water vapor quality in power plants (thermal power, gas turbine, nuclear power, etc.), which reflects the total amount of impurity anions in water vapor. The online hydrogen conductivity device is mainly composed of an online conductivity meter and a hydrogen-type cation exchange column. At present, the high-precision pure water-level online conductivity meter measurement technology has matured, so the accuracy of hydrogen conductivity measurement mainly depends on the state of the cation exchange resin and the impact of the exchange column on the measurement results. Traditional cation exchange columns have problems such as frequent regeneration / replacement of cation exchange resins, large maintenance workload, high operating costs, and poor measurement accuracy.

[0003] Therefore, it is imperative to develop an intelligent maintenance-free ion regeneration device that replaces traditional cation exchange resins with electrically regenerated ion exchangers, achieves maintenance-free operation of the equipment, and automatically performs intelligent diagnosis when the equipment fails, and automatically adjusts the flow and pressure of the sample water to improve the reliability of the electrically regenerated ion exchanger. Summary of the invention

[0004] The object of the present invention is to provide a water sample control system for a hydrogen conductivity measurement system and a method of using the same, so as to solve the problems of frequent exchange resin replacement, heavy maintenance workload and poor instrument measurement accuracy existing in traditional cation exchange columns.

[0005] According to one purpose of the present invention, the present invention provides a sample water control system for a hydrogen conductivity measurement system, comprising a main electric regeneration ion exchanger and a backup electric regeneration ion exchanger, the main electric regeneration ion exchanger and the backup electric regeneration ion exchanger are arranged in parallel, the main electric regeneration ion exchanger and the backup electric regeneration ion exchanger are respectively connected to a chemical sampling water pipeline, a solenoid valve is provided between the electric regeneration ion exchanger and the chemical sampling water pipeline, the rear side of the electric regeneration ion exchanger is sequentially connected to a flow transmitter, a pressure transmitter and a first electric regulating valve, and the first electric regulating valve is connected to a hydrogen conductivity meter.

[0006] Furthermore, a first solenoid valve is provided at the front end of the main electric regeneration ion exchanger, and a second solenoid valve is provided at the front end of the standby electric regeneration ion exchanger.

[0007] Furthermore, the first solenoid valve and the second solenoid valve are respectively connected to the chemical sampling water pipeline through a three-way connector.

[0008] Furthermore, a regulating bypass is connected in parallel to one side of the electrically regenerated ion exchanger, and a second electric regulating valve is installed on the regulating bypass.

[0009] Furthermore, the rear sides of the main electric regeneration ion exchanger and the backup electric regeneration ion exchanger are connected to the flow transmitter, the pressure transmitter and the first electric regulating valve after being merged through a three-way joint.

[0010] Further, the hydrogen conductivity meter is connected to a control system, the solenoid valve, the flow transmitter, the pressure transmitter and the first electric regulating valve are respectively connected to the control system, and the second electric regulating valve is connected to the control system.

[0011] According to another object of the present invention, the present invention provides a method for using the above-mentioned water sample control system for a hydrogen conductivity measurement system, comprising the following steps:

[0012] The first solenoid valve is opened and the main electric regeneration ion exchanger is running. When the running time of the main electric regeneration ion exchanger reaches the set value, the control system automatically controls the first solenoid valve to close and opens the second solenoid valve at the same time, switching to the standby electric regeneration ion exchanger for operation.

[0013] Furthermore, after the measured value of the hydrogen conductivity meter exceeds the alarm value for a period of time, the control system automatically switches to the backup electric regeneration ion exchanger and re-judges the hydrogen conductivity measurement value. When the measured value returns to normal, it is judged that the main electric regeneration ion exchanger is faulty, and the control system issues a reminder that the main electric regeneration ion exchanger needs maintenance. At the same time, it locks the backup electric regeneration ion exchanger into operation and no longer performs automatic regular switching. After the maintenance is completed, the lock is released after manual confirmation of the main ion exchanger being put into operation; when the measured value still exceeds the limit, the control system issues a reminder that the water quality exceeds the standard.

[0014] Furthermore, the measurement signals of the flow transmitter and the pressure transmitter are sent to the control system, and the first electric control valve automatically adjusts the flow rate after PID calculation according to the deviation between the flow setting value and the measurement signal of the flow transmitter. At the same time, the second electric control valve can reduce the pressure of the sample water as much as possible while meeting the flow requirement, so as to increase the service life of the electrically regenerated ion exchanger while ensuring its regeneration capacity.

[0015] Furthermore, when the adjustment margin of the first electric regulating valve is insufficient, such as when its opening degree has reached 90%, the opening degree of the second electric regulating valve will be automatically closed, and the flow and pressure will be automatically readjusted to a steady state.

[0016] The technical solution of the present invention replaces the traditional cation exchange resin with two electrically regenerated ion exchangers. When the control system determines that the measured value of the hydrogen conductivity meter exceeds the standard or the change speed of the measured value exceeds the limit, it automatically switches to the standby electrically regenerated ion exchanger for operation, and performs intelligent fault diagnosis at the same time, and determines whether it is an ion exchanger failure or water quality exceeding the standard according to the actual situation; in addition, in order to ensure the regeneration effect of the electrically regenerated ion exchanger, the flow rate and pressure of the sample water are automatically adjusted by the electric regulating valve. Under the premise of meeting the measurement accuracy, the service life of the electrically regenerated ion exchanger is extended as much as possible, which can effectively ensure the continuous and accurate measurement of the hydrogen conductivity meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 A simplified diagram of the system logic of an embodiment of the present invention;

[0020] In the figure: 1. Electric regeneration ion exchanger A; 2. Electric regeneration ion exchanger B; 3. First solenoid valve; 4. Second solenoid valve; 5. Flow transmitter; 6. Pressure transmitter; 7. First electric regulating valve; 8. Second electric regulating valve. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, 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 connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1

[0025] like Figure 1 As shown:

[0026] A sample water control system for a hydrogen conductivity measurement system, comprising an electric regeneration ion exchanger A1, an electric regeneration ion exchanger B2, a first solenoid valve 3, a second solenoid valve 4, a flow transmitter 5, a pressure transmitter 6, a first electric regulating valve 7, a second electric regulating valve 8 and a DCS control system, wherein:

[0027] A three-way joint is installed on the original chemical sampling water pipeline at the production site, the water inlet of the three-way joint is connected to the chemical sampling water pipeline, the two water outlets of the three-way joint are respectively connected to the first solenoid valve 3 and the second solenoid valve 4, and the outlets of the first solenoid valve 3 and the second solenoid valve 4 are respectively connected to the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2.

[0028] The outlets of the electrically regenerated ion exchanger A1 and the electrically regenerated ion exchanger B2 are respectively connected to the flow transmitter 5, the pressure transmitter 6 and the first electric regulating valve 7 in sequence, and the outlet of the first electric regulating valve 7 is connected to the hydrogen conductivity meter.

[0029] The water in the chemical sampling water pipeline is connected to the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2 after passing through the first solenoid valve 3 and the second solenoid valve 4. The pipelines after the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2 are collected through a three-way joint, and then pass through the flow transmitter 5 and the pressure transmitter 6 respectively, and are sent to the hydrogen conductivity meter for measurement after passing through the first electric regulating valve 7 for adjusting the flow.

[0030] In this embodiment, the electric regeneration ion exchanger is normally one main and one standby, including the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2 arranged in parallel, which can be freely selected. In addition, the system is also provided with a regulating bypass before the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2, and a second electric regulating valve 8 is installed on the regulating bypass, and the second electric regulating valve 8 is used to control the sample water pressure.

[0031] The measured value of the hydrogen conductivity meter is sent to the DCS system for monitoring and as a basis for fault diagnosis. The first solenoid valve 3 is used to put the electric regeneration ion exchanger A1 into operation, and the second solenoid valve 4 is used to put the electric regeneration ion exchanger B2 into operation. The first solenoid valve 3 and the second solenoid valve 4 are controlled by the instructions issued by the DCS control system.

[0032] like Figure 2 As shown, when the present invention is used:

[0033] Taking the electrically regenerated ion exchanger A1 as the main ion exchanger as an example, when the first solenoid valve 3 is opened and the electrically regenerated ion exchanger A1 is running, when the running time of the ion exchanger reaches the set value, the DCS control system automatically controls the first solenoid valve 3 to close, and opens the second solenoid valve 4 at the same time, switching to the electrically regenerated ion exchanger B2 for operation; or manual switching is performed.

[0034] In this embodiment, after the measured value of the hydrogen conductivity meter exceeds the alarm value for a period of time (the alarm value and time can be set), the DCS control system automatically switches to the backup electric regeneration ion exchanger and re-judges the hydrogen conductivity measurement value. When the measured value returns to normal, it is judged that the main ion exchanger is faulty, and the control system issues a prompt "the main ion exchanger needs maintenance" and locks the backup ion exchanger into operation at the same time. Automatic regular switching is no longer performed. After the maintenance is completed, the main ion exchanger is manually confirmed to be put into operation and then the lock is released; when the measured value still exceeds the limit, the control system issues a prompt "the water quality exceeds the standard".

[0035] In this embodiment, the measurement signals of the flow transmitter 5 and the pressure transmitter 6 are sent to the DCS control system, and the first electric control valve 7 is automatically adjusted after PID calculation according to the deviation between the flow set value and the measurement signal of the flow transmitter 5. At the same time, the second electric control valve 8 can reduce the pressure of the sample water as much as possible while meeting the flow requirement, so as to maximize the service life of the electrically regenerated ion exchanger while ensuring its regeneration capacity.

[0036] The present invention gives priority to meeting the requirements of sample water flow. When the adjustment margin of the first electric regulating valve 7 is insufficient (for example, its opening has reached 90%), the second electric regulating valve 8 will be automatically closed to a certain opening, and the flow and pressure will be automatically readjusted to a steady state.

[0037] The present invention replaces the traditional cation exchange resin with two electrically regenerated ion exchangers (one main and one backup). When the control system determines that the measured value of the hydrogen conductivity meter exceeds the standard or the change speed of the measured value exceeds the limit, it automatically switches to the backup electrically regenerated ion exchanger for operation, and performs intelligent fault diagnosis at the same time, and determines whether it is an ion exchanger failure or water quality exceeding the standard according to the actual situation; in addition, in order to ensure the regeneration effect of the electrically regenerated ion exchanger, the flow rate and pressure of the sample water are automatically adjusted by the electric regulating valve. Under the premise of ensuring accurate measurement, the service life of the electrically regenerated ion exchanger is extended as much as possible, which can effectively ensure the continuous and accurate measurement of the hydrogen conductivity meter.

[0038] 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 with 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 water sample control system for a hydrogen conductivity measurement system, It is characterized in that It includes a main electric regeneration ion exchanger and a backup electric regeneration ion exchanger, the main electric regeneration ion exchanger and the backup electric regeneration ion exchanger are respectively connected to the chemical sampling water pipeline, solenoid valves are provided between the main electric regeneration ion exchanger and the backup electric regeneration ion exchanger and the chemical sampling water pipeline, the rear sides of the main electric regeneration ion exchanger and the backup electric regeneration ion exchanger are connected in sequence with a flow transmitter, a pressure transmitter and a first electric regulating valve, and the first electric regulating valve is connected to a hydrogen conductivity meter.

2. The water sample control system for the hydrogen conductivity measurement system according to claim 1, It is characterized in that The main electric regeneration ion exchanger and the backup electric regeneration ion exchanger are arranged in parallel, a first solenoid valve is arranged at the front end of the main electric regeneration ion exchanger, and a second solenoid valve is arranged at the front end of the backup electric regeneration ion exchanger.

3. The water sample control system for the hydrogen conductivity measurement system according to claim 2, It is characterized in that The first solenoid valve and the second solenoid valve are respectively connected to the chemical sampling water pipeline through three-way connectors.

4. The water sample control system for a hydrogen conductivity measurement system according to claim 1, It is characterized in that A regulating bypass is connected in parallel to one side of the electric regeneration ion exchanger, and a second electric regulating valve is installed on the regulating bypass.

5. The water sample control system for a hydrogen conductivity measurement system according to claim 1, It is characterized in that The rear sides of the main electric regeneration ion exchanger and the standby electric regeneration ion exchanger are connected to the flow transmitter, the pressure transmitter and the first electric regulating valve after being merged through a three-way joint.

6. The water sample control system for a hydrogen conductivity measurement system according to claim 4, It is characterized in that The hydrogen conductivity meter is connected to a control system, the solenoid valve, the flow transmitter, the pressure transmitter and the first electric regulating valve are respectively connected to the control system, and the second electric regulating valve is connected to the control system.

7. The method for using the sample water control system for the hydrogen conductivity measurement system according to claim 4, It is characterized in that The steps include: The first solenoid valve is opened and the main electric regeneration ion exchanger is running. When the running time of the main electric regeneration ion exchanger reaches the set value, the control system automatically controls the first solenoid valve to close and opens the second solenoid valve at the same time, switching to the standby electric regeneration ion exchanger for operation.

8. The method for using the sample water control system for the hydrogen conductivity measurement system according to claim 7, It is characterized in that When the measured value of the hydrogen conductivity meter exceeds the alarm value for a period of time, the control system automatically switches to the backup electric regeneration ion exchanger and re-judges the hydrogen conductivity measurement value. When the measured value returns to normal, it is judged that the main electric regeneration ion exchanger is faulty. The control system issues a reminder that the main electric regeneration ion exchanger needs maintenance, and locks the backup electric regeneration ion exchanger into operation. Automatic periodic switching is no longer performed. After the maintenance is completed, the lock is released after manual confirmation of the main ion exchanger being put into operation. When the measured value still exceeds the limit, the control system issues a reminder that the water quality exceeds the standard.

9. The method for using the sample water control system for the hydrogen conductivity measurement system according to claim 7, It is characterized in that The measurement signals of the flow transmitter and the pressure transmitter are sent to the control system. The first electric regulating valve automatically adjusts the flow rate after PID calculation according to the deviation between the flow rate setting value and the measurement signal of the flow transmitter. At the same time, the second electric regulating valve reduces the pressure of the sample water while meeting the flow rate requirements, so as to increase the service life of the electrically regenerated ion exchanger while ensuring its regeneration capacity.

10. The method for using the sample water control system for a hydrogen conductivity measurement system according to claim 7, It is characterized in that When the adjustment margin of the first electric regulating valve is insufficient, such as when its opening has reached 90%, the opening of the second electric regulating valve will be automatically closed, and the flow and pressure will be automatically readjusted to a steady state.

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