Resin regeneration system for hydrogen conductivity meter and regeneration method thereof

Abstract

Specifically, the present invention discloses a resin regeneration system for hydrogen conductivity meter, which includes a resin regeneration system connected to the original mixed bed system, and a resin regeneration cleaning water supply system for monitoring and controlling the resin regeneration system, the resin regeneration system includes a hydrochloric acid injection box and a regeneration resin tube that are connected to each other, the resin regeneration cleaning water supply system includes a main engine, an electromagnetic valve and a probe assembly that are electrically connected to each other, the acid injection port at the bottom of the regeneration resin tube is provided with a passage for direct connection with the conductivity meter of the original mixed bed system, the pipeline connecting the regeneration resin tube and the hydrochloric acid injection box is provided with a passage for connection with the acidity measuring meter of the original mixed bed system, thereby the resin regeneration system is directly connected to the original mixed bed system, the electromagnetic valve is provided in the supply pipeline of the desalted regeneration water pump of the original mixed bed system to control the water supply to the hydrochloric acid injection box, and the main engine is electrically connected to the electromagnetic valve and the probe assembly, respectively.

Description

[Technical field]

[0001] The present invention belongs to the technical field of chemical equipment maintenance in power technology, and specifically relates to a resin regeneration system and regeneration method for a hydrogen conductivity meter. [Background technology]

[0002] Chemical equipment maintenance is a big problem in power plant maintenance, especially in the detection and maintenance of hydrogen online equipment. Because the resin regeneration of hydrogen resin column is not sufficient, the online hydrogen conductivity fluctuates greatly, and the water quality cannot be accurately monitored. In the prior art, in order to save maintenance costs, most power plants do not purchase special resin regeneration equipment, but let the experimental team immerse the hydrogen resin column in a container filled with hydrochloric acid solution or wash the surface of the hydrogen resin column with running water. However, the above method has the problem that the concentration of the resin regeneration acid cannot be detected, and at the same time, in the washing process, the water is discharged from the top to the bottom to only wash the resin surface, which means that the resin regeneration is not sufficient, and the regeneration pass end point cannot be monitored in the regeneration process.

[0003] No. CN112808324A, "Dynamic regeneration apparatus for hydrogen type cation exchange resin column and its operating method", specifically, by arranging an acidic liquid storage tank, a desalted water tank, and a cation exchange resin column, realizes dynamic regeneration of hydrogen type cation exchange resin without on-site real-time monitoring and improves regeneration efficiency. However, in this apparatus, the acid regeneration solution is premixed, and during the regeneration process, the acid concentration is uneven, and the acid concentration is unstable, which has an adverse effect on resin regeneration. Summary of the Invention [Problem to be solved by the invention]

[0004] In order to solve the above technical problems, the present invention provides a resin regeneration system for hydrogen conductivity meter, which utilizes the regeneration acidity meter and conductivity meter of the original mixed bed to effectively control the acid concentration and regeneration end point during the regeneration process.

[0005] The technical solutions of the present invention are as follows:

[0006] The present invention provides a resin regeneration system for a hydrogen conductivity meter, comprising a resin regeneration system connected to an original mixed bed system, and a resin regeneration cleaning water supply system for monitoring and controlling the resin regeneration system, the resin regeneration system comprising a hydrochloric acid injection box and a regeneration resin cylinder which are connected to each other, the resin regeneration cleaning water supply system comprising a main engine, an electromagnetic valve and a probe assembly which are electrically connected to each other, the acid injection port at the bottom of the regeneration resin cylinder is provided with a passage for direct connection to the conductivity meter of the original mixed bed system, the pipeline connecting the regeneration resin cylinder and the hydrochloric acid injection box is provided with a passage for connection to the acidity measuring meter of the original mixed bed system, thereby the resin regeneration system is directly connected to the original mixed bed system, the electromagnetic valve is provided in the water supply pipeline of the desalted regeneration water pump of the original mixed bed system to control the water supply to the hydrochloric acid injection box, and the main engine is electrically connected to the electromagnetic valve and the probe assembly respectively.

[0007] Furthermore, the main pipe connecting the hydrochloric acid injection box and the recycled resin cylinder has two branch pipes, one of which is connected to the acid injection port at the bottom of the recycled resin cylinder, and the other is connected to the water supply port at the top of the recycled resin cylinder. A drain pipe is installed in parallel to the branch pipe connected to the acid injection port, and an acid discharge pipe is installed in parallel to the branch pipe connected to the water supply port. All of the pipes are equipped with valves.

[0008] Furthermore, a drug injection adjusting pump is provided in the main line connecting the hydrochloric acid injection box and the regenerated resin cylinder, and the main line is also connected to an acidity meter.

[0009] Furthermore, the solenoid valve has two passages, one of which is connected to the water supply line of the desalted reclaimed water pump of the original mixed bed system, and the other is connected to the water supply pipe to supply water to the hydrochloric acid injection box.

[0010] Further, the probe assembly includes at least three probes located at a high water line, a mid water line and a low water line of the hydrochloric acid injection box, respectively, the low water line being located at the bottom of the hydrochloric acid injection box.

[0011] Furthermore, when the probe assembly is connected to a main engine, multiple probe wires are joined together to form two signal output wires for transmitting high water level and medium water level warning signals respectively.

[0012] Furthermore, the recycled resin cylinder is a sealed cylinder with a cover, and an acid inlet is provided at the lower part of the side wall of the cylinder body, and a water supply port is provided at the upper part, and both the acid inlet and the water supply port are provided with filter cloths.

[0013] The present invention further provides a method for regenerating resin for a hydrogen conductivity meter, which utilizes the above-mentioned resin regeneration system for a hydrogen conductivity meter to realize regeneration of the resin exchange column of the hydrogen conductivity meter.

[0014] Furthermore, the method for regenerating resin for a hydrogen conductivity meter includes the steps of:

[0015] Step S1: calculating the amount of hydrochloric acid used for the regenerated resin based on the amount of the replaced regenerated resin, and adding the hydrochloric acid to the hydrochloric acid injection box;

[0016] Step S2 of adding demineralized water into the hydrochloric acid injection box so that the acid concentration in the hydrochloric acid injection box reaches 5% based on the volume of hydrochloric acid in the hydrochloric acid injection box;

[0017] Step S3 of isolating the acidity meter and conductivity meter installed in the original mixed bed system from the acid regeneration line of the original mixed bed system;

[0018] The acidity meter and the drug injection adjustment pump are connected to each other, and the drug injection adjustment pump is started. Under the driving of the drug injection adjustment pump, the hydrochloric acid in the hydrochloric acid injection box is caused to flow into the regenerated resin cylinder through the acid injection port at the bottom thereof, and the regenerated resin is passed through the regenerated resin to realize regeneration. At the same time, the frequency of the drug injection adjustment pump is adjusted in real time according to the parameters of the acidity meter, so that the monitoring parameters of the acidity meter approach the regenerated acidity. Step S4.

[0019] After the acid injection is completed, the desalted regenerated water pump is connected to the hydrochloric acid injection box, and the desalted water flows into the desalted regenerated water pump from the water supply port at the top of the regenerated resin cylinder to wash the regenerated resin inside the cylinder. During the washing process, if it is confirmed that the conductivity meter reaches less than 1 us / cm, the resin regeneration is deemed successful. Step S5 is included.

[0020] Furthermore, in step S4, when the resin is regenerated with hydrochloric acid, the hydrochloric acid enters the regenerated resin tube from the hydrochloric acid injection box, and the flow direction is from the bottom to the top, and in step S5, when the resin is washed with demineralized water, the demineralized water enters the regenerated resin tube from the hydrochloric acid injection box, and the flow direction is from the top to the bottom.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (1) The present invention provides a resin regeneration system for hydrogen conductivity meters, and connects the hydrogen conductivity meter to the original mixed bed through a pipeline. The acidity meter and conductivity meter of the original mixed bed system can control the concentration of the regenerated acid throughout the entire resin regeneration process and the regeneration end point. At the same time, the stability of the acid concentration during the regeneration process can be ensured. This overcomes the technical problems of the prior art, which require the purchase of special regeneration equipment, and are difficult to control the parameters of the equipment during the regeneration process and cannot monitor the regeneration pass end point. The use cost of the system of the present invention is low and inexpensive. Compared with the commercially available resin regeneration equipment for special hydrogen conductivity meters, this equipment costs only 1 / 90 and is convenient to maintain.

[0023] (2) In the resin regeneration process of the present invention, the acid flow path is set to enter from the bottom and exit from the top by utilizing the regeneration acid, so as to ensure that the resin is in complete contact with the regeneration acid and to ensure the regeneration degree.

[0024] When using the regeneration system provided by the present invention to regenerate resin, the burden on the worker is reduced. In the case of regeneration cleaning, the original method requires continuous manual stirring, but the present invention only requires an electromagnetic valve to supply water, and the water is supplied to the bottom, and the residual acid in the resin cylinder is discharged from the top until it is completely washed. [Brief description of the drawings]

[0025] [Figure 1] FIG. 2 is a schematic diagram of the connection of the original mixed bed and the resin regeneration system of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing the pipe connections of the resin regeneration system of the present invention. [Diagram 3] FIG. 2 is a schematic diagram showing the connection of the resin regeneration cleaning water supply system of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The invention will now be further described with reference to the drawings and preferred embodiments. Example 1

[0027] The resin regeneration system for the hydrogen conductivity meter includes a resin regeneration system connected to the original mixed bed system 6, and a resin regeneration cleaning water supply system for monitoring and controlling the resin regeneration system, the resin regeneration system performs an acid regeneration treatment on the regenerated resin by controlling the hydrochloric acid solution, and after the acid regeneration treatment, the resin regeneration cleaning water supply system controls the water supply to wash the regenerated resin;

[0028] The resin regeneration system includes a hydrochloric acid injection box 1 and a regenerated resin cylinder 2 which are connected to each other, and the resin regeneration cleaning water supply system includes a main engine, an electromagnetic valve and a probe assembly which are electrically connected to each other, the acid injection port at the bottom of the regenerated resin cylinder 2 is provided with a passage for direct connection to the conductivity meter of the original mixed bed system 6, and the pipeline connecting the regenerated resin cylinder 2 and the hydrochloric acid injection box 1 is provided with a passage for connection to the acidity measuring meter 3 of the original mixed bed system 6, thereby the resin regeneration system is directly connected to the original mixed bed system 6, and the electromagnetic valve 5 is provided in the water supply pipeline of the desalted regenerated water pump of the original mixed bed system 6 to control the water supply to the hydrochloric acid injection box 1, and the main engine is electrically connected to the electromagnetic valve and the probe assembly, respectively.

[0029] Here, the main pipe connecting the hydrochloric acid injection box 1 and the regenerated resin cylinder 2 has two branch pipes, one of which is connected to the acid injection port at the bottom of the regenerated resin cylinder 2 and is provided with a No. 7 valve in the pipe, and the other is connected to the water supply port at the top of the regenerated resin cylinder 2 and is provided with a No. 6 valve in the pipe. A drain pipe is provided in parallel to the branch pipe connecting the hydrochloric acid injection box 1 and the acid injection port, and a No. 8 valve is provided in the drain pipe. A passage is opened in the drain pipe, which is connected to the conductivity meter 4 of the original mixed bed system 6, and a No. 1 valve is provided in this passage. At the same time, a No. 2 valve is provided in the pipe connecting the conductivity meter 4 and the original mixed bed system 6, and a No. 3 valve is provided in the pipe connecting the hydrochloric acid injection box 1 and the water supply An acid discharge pipeline is provided in parallel to the branch pipe connected to the inlet, and both of the acid discharge pipelines are provided with a No. 5 valve. A drug injection adjustment pump is provided in the main pipeline connecting the hydrochloric acid injection box 1 and the recycled resin tube 2. At the same time, the main pipeline is connected to an acidity meter 3, and a No. 3 valve is provided in the pipeline connecting the main pipeline and the acidity meter 3, and a No. 4 valve is provided in the pipeline connecting the acidity meter 3 and the original mixed bed system 6. The recycled resin tube 2 is a sealed tube with a cover, and the acid injection port of the recycled resin tube 2 can be a drain port in the cleaning water supply process, and the water supply port can be an acid discharge port in the acid regeneration stage, and both the acid injection port and the water supply port are provided with filter cloth.

[0030] Here, the solenoid valve 5 provided in the resin regeneration cleaning water supply system has two passages, one of which is connected to the water supply line of the desalted regenerated water pump of the original mixed bed system 6, and the other is connected to the water supply pipe to supply water to the hydrochloric acid injection box 1, so that during the cleaning water supply stage, the desalted regenerated water is controlled to enter the hydrochloric acid injection box 1, preparing for cleaning the regenerated resin.

[0031] Here, the probe assembly includes at least three probes, which are respectively located at the high water level line, the middle water level line and the low water level line of the hydrochloric acid injection box 1, the low water level line is located at the bottom of the hydrochloric acid injection box 1, when the water level of the hydrochloric acid injection box 1 contacts the upper probe located at the high water level, the probe sends a signal to the main engine, the main engine closes the solenoid valve and controls the water supply to the hydrochloric acid injection box 1 to stop, when the water level of the hydrochloric acid injection box 1 is lower than the probe located at the middle water level, only the lower probe located at the low water level line can be sensed and outputs a signal to the main engine, the main engine controls the solenoid valve to open and continue to supply water to the hydrochloric acid injection box. Example 2

[0032] The method for regenerating resin for hydrogen conductivity meters is as follows:

[0033] Step S1: calculating the amount of hydrochloric acid used for the regenerated resin based on the amount of the replaced regenerated resin, and adding the hydrochloric acid to the hydrochloric acid injection box;

[0034] Step S2 of adding demineralized water into the hydrochloric acid injection box 1 so that the acid concentration in the hydrochloric acid injection box 1 reaches 5% based on the volume of hydrochloric acid in the hydrochloric acid injection box 1;

[0035] Step S3 of separating the acidity measuring meter 3 and the conductivity meter 4 provided in the original mixed bed system 6 from the acid regeneration pipeline of the original mixed bed system 6, in which in this embodiment, the acidity measuring meter 3 and the original mixed bed system 6 can be separated by switching off the No. 4 valve in the pipeline connecting the acidity measuring meter 3 and the original mixed bed system 6, and the conductivity meter 4 and the original acid regeneration pipeline can be separated by closing the No. 2 valve in the pipeline connecting the conductivity meter 4 and the original acid regeneration pipeline;

[0036] Inject acid step S4, in this case, open valves 5, 7 and 3, close valves 6, 8 and 1, connect acidity meter 3 with drug injection adjustment pump, connect hydrochloric acid injection box 1 with regenerated resin cylinder 2, start drug injection adjustment pump, under the driving action of drug injection adjustment pump, hydrochloric acid in hydrochloric acid injection box 1 flows into the cylinder from the acid injection port at the bottom of regenerated resin cylinder 2, passes through the regenerated resin, and then exits from the acid outlet at the top of resin regeneration cylinder 2 to realize resin regeneration, the flow mode of acid solution is from the bottom to the top, ensures that the resin is in complete contact with the regenerated acid, and ensures the regeneration degree; at the same time, according to the parameters of acidity meter 3, adjust the frequency of drug injection adjustment pump in real time, and make the monitoring parameters of acidity meter 3 approach the regenerated acidity step S4;

[0037] After the acid injection is completed, the cleaning stage is started, solenoid valve 5 is opened, water is supplied to hydrochloric acid injection box 1 to a certain height, then solenoid valve 5 is closed, valves 6, 8, 1 and solenoid valve 5 are opened, valves 5, 7 and 3 are closed, the desalted water flows from hydrochloric acid injection box 1 through the water supply port at the top of regenerated resin cylinder 2 into regenerated resin cylinder 2 to clean the regenerated resin in the cylinder, the flow direction of the desalted water is from the top to the bottom, and the cleaning process includes step S5, in which the resin regeneration is deemed successful when the conductivity meter 4 is confirmed to reach less than 1us / cm.

[0038] Furthermore, in step S4, when the resin is regenerated with hydrochloric acid, the hydrochloric acid enters the regenerated resin tube 2 from the hydrochloric acid injection box 1, and the flow direction is from the bottom to the top, and in step S5, when the resin is washed with demineralized water, the demineralized water enters the regenerated resin tube 2 from the hydrochloric acid injection box 1, and the flow direction is from the top to the bottom.

[0039] The above description is merely an embodiment of the present invention, and is not intended to limit the scope of the present invention. All equivalent structures or equivalent processes made using the contents of the specification of the present invention or directly or indirectly applied in other related technical fields are also included in the scope of protection of the present invention. [Explanation of symbols]

[0040] Explanation of drawing symbols 1. Hydrochloric acid injection box, 2. Regenerated resin cylinder, 3. Acidity meter, 4. Conductivity meter, 5. Solenoid valve, 6. Original mixed bed system.

Claims

1. An ion exchange resin regeneration system for a conductivity meter for measuring hydrogen ion concentration, comprising: an ion exchange resin regeneration system connected to an original mixed bed system (6); and an ion exchange resin regeneration cleaning and water supply system for monitoring and controlling the ion exchange resin regeneration system, the ion exchange resin regeneration system comprising a hydrochloric acid injection box (1) and a regenerated resin tube (2) which are interconnected; the ion exchange resin regeneration cleaning and water supply system comprising a main engine, a solenoid valve and a probe assembly which are electrically connected to each other; an acid injection port at the bottom of the regenerated resin tube (2) having a passage for direct connection to a conductivity meter (4) of the original mixed bed system (6); and a pipeline connecting the regenerated resin tube (2) and the hydrochloric acid injection box (1). a passage is opened from the hydrochloric acid injection box (1) to an acidity meter (3) for measuring the concentration of hydrochloric acid flowing into the original mixed bed system (6), thereby connecting the ion exchange resin regeneration system directly to the original mixed bed system (6); the solenoid valve (5) is provided in the water supply line of the desalted regenerated water pump of the original mixed bed system (6) to control the water supply to the hydrochloric acid injection box (1); a main engine is electrically connected to the solenoid valve (5) and the probe assembly, and the main engine receives an electrical signal transmitted from the probe assembly and controls the opening and closing of the solenoid valve based on the electrical signal.

2. The system for regenerating ion exchange resin for a conductivity meter for measuring hydrogen ion concentration according to claim 1, characterized in that the main pipe connecting the hydrochloric acid injection box (1) and the regenerated resin cylinder (2) has two branch pipes, one of which is connected to an acid injection port at the bottom of the regenerated resin cylinder (2) and the other is connected to a water supply port at the top of the regenerated resin cylinder (2), the branch pipe connected to the acid injection port has a drain pipe line in parallel thereto, the branch pipe connected to the water supply port has a acid discharge pipe line in parallel thereto, and all of the pipes are provided with valves.

3. 3. The system for regenerating ion exchange resin for a conductivity meter for measuring hydrogen ion concentration according to claim 2, characterized in that a drug injection adjustment pump is provided in a main line connecting the hydrochloric acid injection box (1) and the regenerated resin cylinder (2), and at the same time, the main line is connected to an acidity meter (3).

4. The regeneration system for ion exchange resin for a conductivity meter for measuring hydrogen ion concentration according to claim 3, characterized in that the solenoid valve (5) has two passages, one of which is connected to the water supply line of the desalted regenerated water pump of the original mixed bed system (6), and the other of which is connected to the water supply pipe for supplying water to the hydrochloric acid injection box (1).

5. 5. The regeneration system of ion exchange resin for a conductivity meter for measuring hydrogen ion concentration according to claim 4, characterized in that the probe assembly includes at least three probes located at the high water line, the middle water line and the low water line of the hydrochloric acid injection box (1), respectively, and the low water line is located at the bottom of the hydrochloric acid injection box (1).

6. 6. The ion exchange resin regeneration system for a conductivity meter for measuring hydrogen ion concentration as claimed in claim 5, characterized in that when the probe assembly is connected to a main engine, a plurality of probe wires are joined together to form two signal output wires for respectively transmitting high water level and medium water level warning signals.

7. 7. The regenerating system for ion exchange resin for a conductivity meter for measuring hydrogen ion concentration according to claim 6, wherein the regenerated resin cylinder (2) is a sealed cylinder with a cover, an acid inlet is provided at the lower part of the side wall of the cylinder body, a water supply inlet is provided at the upper part, and both the acid inlet and the water supply inlet are provided with filter cloth.

8. A method for regenerating ion exchange resin for a conductivity meter for measuring hydrogen ion concentration, characterized in that the method utilizes a regeneration system for ion exchange resin for a conductivity meter for measuring hydrogen ion concentration described in any one of claims 1 to 6, and regenerates an exchange column of the ion exchange resin of the conductivity meter for measuring hydrogen ion concentration.

9. Step S1: calculating the amount of hydrochloric acid used for the regenerated resin based on the amount of the replaced regenerated resin, and adding the hydrochloric acid to the hydrochloric acid injection box (1); Step S2: adding demineralized water into the hydrochloric acid injection box (1) so that the acid concentration in the hydrochloric acid injection box (1) reaches 5% based on the volume of hydrochloric acid in the hydrochloric acid injection box (1); Step S3 of isolating the acidity meter (3), the conductivity meter (4) and the acid regeneration line of the original mixed bed system (6) provided in the original mixed bed system (6); Step S4: communicating the acidity meter (3) with the chemical injection adjusting pump, starting the chemical injection adjusting pump, and driving the chemical injection adjusting pump to cause the hydrochloric acid in the hydrochloric acid injection box (1) to flow into the regenerated resin cylinder (2) through the acid injection port at the bottom of the cylinder and pass through the regenerated resin, thereby achieving regeneration; and at the same time, adjusting the frequency of the chemical injection adjusting pump in real time based on the parameters of the acidity meter (3) so that the monitoring parameters of the acidity meter (3) approach the regenerated acidity; 9. The method for regenerating ion exchange resin for a conductivity meter for measuring hydrogen ion concentration according to claim 8, further comprising the steps of: connecting the desalted regenerated water pump to the hydrochloric acid injection box (1) after the acid injection is completed; and flowing desalted water into the desalted regenerated water pump from the water supply port at the top of the regenerated resin cylinder (2) to wash the regenerated resin in the cylinder; and determining that the resin regeneration is successful when it is confirmed during the washing process that the conductivity meter (4) reaches less than 1 us / cm.

10. 10. The method for regenerating an ion exchange resin for a conductivity meter for measuring hydrogen ion concentration according to claim 9, characterized in that in step S4, when the resin is regenerated with hydrochloric acid, the hydrochloric acid enters the regenerated resin tube (2) from the hydrochloric acid injection box (1) and flows in a direction from the bottom to the top, and in step S5, when the resin is washed with demineralized water, the demineralized water enters the regenerated resin tube (2) from the hydrochloric acid injection box (1) and flows in a direction from the top to the bottom.

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