Sample water control system for hydrogen conductivity measuring system

Abstract

The utility model provides a sample water control system for a hydrogen conductivity measuring system, which comprises a main electric regeneration ion exchanger and a standby electric regeneration ion exchanger which are arranged in parallel, the main electric regeneration ion exchanger and the standby electric regeneration ion exchanger are respectively connected with a chemical sampling water pipeline, an electromagnetic valve is arranged between the electric regeneration ion exchanger and the chemical sampling water pipeline, and the rear side of the electric regeneration ion exchanger is sequentially connected with a flow transmitter, a pressure transmitter and a first electric control valve; and the first electric control valve is connected with the hydrogen conductivity meter. According to the utility model, the two electric regeneration ion exchangers are used for replacing traditional cation exchange resin, and when a control system judges that the measured value of the 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 judging whether the ion exchanger fails or the water quality exceeds the standard according to the actual situation.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality monitoring equipment, in particular to a water sample control system for a hydrogen conductivity measurement system. Background Art

[0002] Hydrogen conductivity is a key indicator for monitoring and controlling water vapor quality in power plants (thermal, gas turbine, and nuclear power plants, among others). It reflects the total amount of impure anions in the water vapor. Online hydrogen conductivity measurement devices primarily consist of an online conductivity meter and a hydrogen-type cation exchange column. Currently, high-precision pure water-grade online conductivity meter measurement technology is mature. Therefore, the accuracy of hydrogen conductivity measurements primarily depends on the condition of the cation exchange resin and the impact of the column on the measurement results. Traditional cation exchange columns suffer from frequent regeneration and replacement of the cation exchange resin, heavy maintenance workload, high operating costs, and poor measurement accuracy.

[0003] Therefore, it is imperative to develop a set of intelligent maintenance-free ion regeneration devices that replace traditional cation exchange resins with electrically regenerated ion exchangers, achieve maintenance-free equipment operation, and automatically perform intelligent diagnosis when the equipment fails, and automatically adjust the flow and pressure of the sample water to improve the reliability of the electrically regenerated ion exchanger. Utility Model Content

[0004] The purpose of the utility model is to provide a water sample control system for a hydrogen conductivity measurement system to solve the problems of frequent exchange resin replacement, heavy operation and maintenance workload, and poor instrument measurement accuracy in traditional cation exchange columns.

[0005] According to one purpose of the present utility model, the present utility model 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 being connected to a chemical sampling water pipeline respectively, an electromagnetic valve being 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 being connected in sequence with a flow transmitter, a pressure transmitter and a first electric regulating valve, and the first electric regulating valve being 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.

[0009] Furthermore, a second electric regulating valve is installed on the regulating bypass.

[0010] 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.

[0011] Furthermore, the hydrogen conductivity meter is connected to a control system.

[0012] Furthermore, the solenoid valve, the flow transmitter, the pressure transmitter and the first electric regulating valve are respectively connected to the control system.

[0013] Furthermore, the second electric regulating valve is connected to the control system.

[0014] Furthermore, the main electric regeneration ion exchanger and the backup electric regeneration ion exchanger are arranged in parallel.

[0015] 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 simultaneously performs intelligent fault diagnosis to determine whether it is an ion exchanger failure or water quality exceeding the standard based on 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 A simplified diagram of the system logic of an embodiment of the present utility model;

[0019] 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 control valve; 8. Second electric control valve. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] 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", etc., indicating directions or positional relationships, are based on the directions 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "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 an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0023] Example 1

[0024] like Figure 1 As shown:

[0025] A water sample control system for a hydrogen conductivity measurement system, comprising an electrically regenerated ion exchanger A1, an electrically regenerated 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:

[0026] A tee joint is installed on the original chemical sampling water pipeline at the production site. The water inlet of the tee joint is connected to the chemical sampling water pipeline, and the two water outlets of the tee joint are connected to the first solenoid valve 3 and the second solenoid valve 4 respectively. The outlets of the first solenoid valve 3 and the second solenoid valve 4 are connected to the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2 respectively.

[0027] The outlets of the electrically regenerated ion exchanger A1 and the electrically regenerated ion exchanger B2 are connected to the flow transmitter 5, the pressure transmitter 6 and the first electric regulating valve 7 in sequence respectively, and the outlet of the first electric regulating valve 7 is connected to the hydrogen conductivity meter.

[0028] The water in the chemical sampling water pipeline passes through the first solenoid valve 3 and the second solenoid valve 4 and then enters the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2. The pipelines after the electric regeneration ion exchanger A1 and the electric regeneration ion exchanger B2 are connected 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.

[0029] In this embodiment, the electrically regenerated ion exchangers normally function as a primary and a backup, comprising electrically regenerated ion exchanger A1 and electrically regenerated ion exchanger B2, which are arranged in parallel and can be freely selected. Furthermore, the system also includes a regulating bypass between electrically regenerated ion exchanger A1 and electrically regenerated ion exchanger B2, with a second electrically controlled regulating valve 8 installed in the regulating bypass to control the sample water pressure.

[0030] The measured value of the hydrogen conductivity meter is sent to the DCS system for monitoring and serves as a basis for fault diagnosis. The first solenoid valve 3 is used to put the electrically regenerated ion exchanger A1 into operation, and the second solenoid valve 4 is used to put the electrically regenerated ion exchanger B2 into operation. The first solenoid valve 3 and the second solenoid valve 4 are controlled by instructions issued by the DCS control system.

[0031] like Figure 2 As shown, when the utility model is used:

[0032] 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 can be performed.

[0033] In this embodiment, after the value measured by 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-evaluates the hydrogen conductivity measurement value. When the measurement value returns to normal, it is determined that the main ion exchanger is faulty. The control system issues a prompt "The main ion exchanger needs maintenance" and locks the backup ion exchanger into operation. Automatic periodic switching is no longer performed. After the maintenance is completed, manual confirmation is made and the lock is released after the main ion exchanger is put into operation. If the measurement value still exceeds the limit, the control system issues a prompt "The water quality exceeds the standard."

[0034] In this embodiment, the measurement signals of the flow transmitter 5 and the pressure transmitter 6 are sent to the DCS control system. The first electric control valve 7 is automatically adjusted after PID calculation based on 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.

[0035] The utility model 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.

[0036] The utility model 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 simultaneously performs intelligent fault diagnosis to determine whether it is an ion exchanger failure or water quality exceeding the standard based on the actual situation. In addition, 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.

[0037] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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, 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, and 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 a hydrogen conductivity measurement system according to claim 1, characterized in that: 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.

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

4. The water sample control system for a hydrogen conductivity measurement system according to claim 1, characterized in that: A regulating bypass is connected in parallel to one side of the electrical regeneration ion exchanger.

5. The water sample control system for a hydrogen conductivity measurement system according to claim 4, characterized in that: A second electric regulating valve is installed on the regulating bypass.

6. The water sample control system for a hydrogen conductivity measurement system according to claim 1, characterized in that: 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.

7. The water sample control system for a hydrogen conductivity measurement system according to claim 5, characterized in that: The hydrogen conductivity meter is connected to a control system.

8. The water sample control system for a hydrogen conductivity measurement system according to claim 7, characterized in that: The solenoid valve, the flow transmitter, the pressure transmitter and the first electric regulating valve are respectively connected to the control system.

9. The water sample control system for a hydrogen conductivity measurement system according to claim 8, characterized in that: The second electric regulating valve is connected to the control system.

10. The water sample control system for a hydrogen conductivity measurement system according to claim 1, characterized in that: The main electric regeneration ion exchanger and the standby electric regeneration ion exchanger are arranged in parallel.

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