A hydrogen conductivity meter cation exchange resin regeneration system and method

Abstract

The present disclosure relates to a hydrogen conductivity table cation exchange resin regeneration system and method. The system comprises a regeneration unit, a water washing unit, a cation exchange column, a mass monitoring unit, and a data processing and control unit; the method comprises the following steps: S1, the solution in the solution tank enters the cation exchange column to regenerate the invalid cation resin, and the mass monitoring unit is used to monitor the weight of the regenerated cation exchange column in real time, when the regeneration degree of the regenerated cation exchange resin is greater than 98%, the regeneration process is ended, and the treated cation exchange resin is obtained; S2, switching the fluid medium makes the desalted water in the desalted water tank enter the cation exchange column to wash the treated cation exchange resin, and the regenerated cation exchange resin is obtained. The system is used for the regeneration of cation resin, which is simple, flexible and convenient to operate, and the regeneration degree of cation resin is high.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of cation regeneration, in particular, to a hydrogen conductivity meter cation exchange resin regeneration system and method. BACKGROUND

[0002] Hydrogen conductivity is one of the important indicators for monitoring the water vapor system of a thermal power generating unit. It is the conductivity value measured when the measured water sample passes through a hydrogen type cation exchange resin, and the cations are removed, and only anions (chloride ions, sulfate ions, phosphate ions, etc.) and corresponding hydrogen ions remain in the water sample. The measurement of hydrogen conductivity can directly reflect the total content of anions in the water sample. Accurate measurement of this indicator is of great significance. The degree of regeneration of the cation exchange resin in the cation exchange column used in the hydrogen conductivity meter greatly affects the accuracy of the hydrogen conductivity meter.

[0003] Currently, most thermal power plants use a static soaking method to regenerate the cation exchange resin used in the hydrogen conductivity meter when the cation exchange resin is no longer effective. That is, the ineffective cation exchange resin used in the hydrogen conductivity meter is poured into a fixed resin storage container, and when a certain amount of ineffective resin is accumulated, it is soaked in a certain concentration of hydrochloric acid for a certain period of time. During the soaking process, intermittent stirring is performed manually. After the soaking process is completed, desalted water is filled to rinse the regenerated cation exchange resin. During the rinsing process, intermittent stirring is still performed manually. The entire process is cumbersome and time-consuming, and there is no effective monitoring means for the concentration of hydrochloric acid used during the resin regeneration process and the effect after rinsing. It is difficult to meet the requirement that the degree of regeneration of the resin after regeneration is greater than 98%, thereby introducing measurement errors into the hydrogen conductivity meter and seriously affecting the measurement accuracy of the hydrogen conductivity meter.

[0004] In addition, for the hydrogen conductivity meter cation exchange resin regeneration device that has been used, the ineffective resin needs to be unloaded and placed in a special resin storage device in the regeneration device, and then dynamic regeneration is performed. After the resin is regenerated, it is loaded into the ion exchange column again. During the process of loading the resin, if the operation is not careful, air bubbles will be brought into the resin layer. However, the ion exchange column used at present is mostly opaque, and once air bubbles are mixed in, they cannot be discovered and removed in time. The presence of air bubbles in the ion exchange column will also introduce measurement errors into the hydrogen conductivity meter. SUMMARY

[0005] The purpose of the present disclosure is to provide a hydrogen conductivity meter cation exchange resin regeneration system and method. The system is used for the regeneration of cation resin, and has the advantages of simple, flexible and convenient operation, and high degree of regeneration of cation resin.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a hydrogen conductivity meter cation exchange resin regeneration system, which comprises a regeneration unit, a water washing unit, a cation exchange column, a quality monitoring unit, and a data processing and control unit.

[0007] The regeneration unit comprises a solution tank, a first conductivity meter, a first blow-off branch and a first main pipeline, the first main pipeline is connected between the outlet of the solution tank and the bottom opening of the cation exchange column, and the first main pipeline is a flexible pipeline; the inlet of the first blow-off branch is in fluid communication with the top opening of the cation exchange column, and the first conductivity meter is arranged on the first blow-off branch;

[0008] The water washing unit comprises a desalted water tank and a second main pipeline, the second main pipeline is connected between the outlet of the desalted water tank and the top opening of the cation exchange column; and the second main pipeline is a flexible pipeline;

[0009] The side walls of the solution tank and the desalted water tank are each independently provided with a scale;

[0010] The mass monitoring unit comprises a fixed beam, a resistance pressure sensing module and a signal processing and display module; the fixed beam is arranged horizontally in an axial direction, the resistance pressure sensing module is arranged vertically in an axial direction, the upper end of the resistance pressure sensing module is connected with the fixed beam, and the lower end of the resistance pressure sensing module is detachably connected with the upper end of the cation exchange column; the signal processing and display module is electrically connected with the resistance pressure sensing module, and is used for processing an electric signal from the pressure sensing module and outputting a measurement result;

[0011] The mass monitoring unit and the first conductivity meter are each independently signal-connected with the data processing and control unit, and the data processing and control unit is used for calculating the regeneration degree of the cation resin according to the mass from the mass monitoring unit and the blow-off conductivity from the first conductivity meter, so as to control the first main pipeline and the second main pipeline to be in an open or closed state.

[0012] Optionally, a first regulating valve, a first peristaltic pump and a second regulating valve are sequentially arranged on the first main pipeline in the direction of medium flow;

[0013] The first regulating valve and the first peristaltic pump are close to the outlet of the solution tank, and the second regulating valve is close to the bottom opening of the cation exchange column;

[0014] A first blow-off regulating valve is further arranged on the first blow-off branch and located at the inlet of the first conductivity meter.

[0015] Optionally, the water washing unit further comprises a second blow-off branch and a second conductivity meter, the inlet of the second blow-off branch is in fluid communication with the bottom opening of the cation exchange column, and the second conductivity meter is arranged on the second blow-off branch;

[0016] A third regulating valve, a second peristaltic pump and a fourth regulating valve are sequentially arranged on the second main pipeline in the direction of medium flow;

[0017] The third regulating valve and the second peristaltic pump are close to the outlet of the desalinated water tank, and the fourth regulating valve is close to the top opening of the cation exchange column.

[0018] A second blowdown regulating valve is arranged on the second blowdown branch and located at the inlet of the second conductivity meter.

[0019] Optionally, the water washing unit further comprises a second water washing branch; the second water washing branch is connected between the first main pipeline and the second main pipeline, and a water washing branch regulating valve is arranged on the second water washing branch.

[0020] The control unit is signal connected with the second conductivity meter, so as to receive the real-time conductivity signal of the second conductivity meter and adjust the second main pipeline and / or the second water washing branch to be in an open or closed state according to the real-time conductivity signal.

[0021] Optionally, the system further comprises an air branch, and an outlet of the air branch is in fluid communication with the bottom opening of the cation exchange column.

[0022] A gas pump and an air regulating valve are sequentially arranged on the air branch in the direction of air entering.

[0023] Optionally, the resistance pressure sensing module comprises a strain resistance wire and an elastic body, and the strain resistance wire is adhered to the elastic body in the length direction.

[0024] A resistance signal output end is arranged at the top of the strain resistance wire, for outputting an electric signal, and the resistance signal output end is electrically connected with the signal processing and display module.

[0025] Optionally, a first reducing joint is arranged on the first main pipeline at the connection with the bottom opening of the cation exchange column, and a second reducing joint is arranged on the second main pipeline at the connection with the top opening of the cation exchange column.

[0026] The diameters of the first reducing joint and the second reducing joint are each independently selected from one or more of 6 mm, 8 mm and 10 mm.

[0027] The materials of the first main pipeline and the second main pipeline are each independently selected from one or more of a silica gel tube, a PC tube and a PE tube.

[0028] Optionally, a flow meter is arranged in each of the solution tank and the desalinated water tank.

[0029] The control unit is connected with flow meters in the solution tank and the demineralized water tank to receive real-time flow signals of the solution from the solution tank or the demineralized water from the demineralized water tank flowing through the cation exchange column and adjust the first main pipeline, the second main pipeline or the second water washing branch to be in an open or closed state according to the real-time flow signals.

[0030] Optionally, the cation exchange column is multiple, and the multiple cation exchange columns are arranged in parallel; preferably, the number of the cation exchange columns is 1-5.

[0031] The second aspect of the present disclosure provides a method for regenerating hydrogen conductivity table cation exchange resin by using the system of the first aspect, and the method comprises the following steps:

[0032] S1, the solution in the solution tank enters the cation exchange column to regenerate the invalid cation exchange resin, and the mass monitoring unit is used to monitor the weight of the regenerated cation exchange column in real time, and when the regeneration degree of the regenerated cation exchange resin is greater than 98%, the regeneration is ended, and the treated cation exchange resin is obtained;

[0033] S2, switching the fluid medium to make the demineralized water in the demineralized water tank enter the cation exchange column to wash the treated cation exchange resin, and the regenerated cation exchange resin is obtained.

[0034] Optionally, the regeneration degree of the regenerated cation exchange resin is obtained according to the following method:

[0035] Re is calculated by the formula Re=(M2 / V) / [(M1 / V)-(M2 / V)], when Re is greater than or equal to 16.5, it is judged that the regeneration degree of the regenerated cation exchange resin is greater than 98%; when Re is less than 16.5, it is judged that the regeneration degree of the regenerated cation exchange resin is less than 98%;

[0036] Wherein, M1 is the mass of the invalid cation exchange column filled with demineralized water; M2 is the mass of the regenerated cation exchange column after the effluent conductivity is stable for 3-5 minutes; V is the volume of the cation exchange resin column.

[0037] Optionally, in step S1, when the regeneration degree of the regenerated cation exchange resin is less than 98%, the solution in the solution tank enters the cation exchange column to regenerate the cation exchange resin with a regeneration degree of less than 98%, and the mass monitoring unit is used to monitor the weight of the regenerated cation exchange column in real time until the regeneration degree of the regenerated cation exchange resin is greater than 98%.

[0038] Optionally, step S1 further comprises: during the regeneration process, using a gas pump to intermittently introduce gas into the cation exchange column; wherein the time for a single introduction of gas is 3-5s, the time interval for the introduction of gas is 15-20s, and the flow rate of the gas is 0.1-0.5L / s.

[0039] Step S2 further comprises: during the water washing process, using a gas pump to intermittently introduce gas into the cation exchange column; wherein the time for a single introduction of gas is 3-5s, the time interval for the introduction of gas is 15-20s, and the flow rate of the gas is 0.1-0.5L / s.

[0040] Optionally, the solution in the solution tank is hydrochloric acid; the mass concentration of the solution is 3-5%;

[0041] The flow rate of the solution in the solution tank into the cation exchange column is 100-200mL / min;

[0042] The flow rate of the desalted water in the desalted water tank into the cation exchange column is 100-150mL / min.

[0043] Through the above technical solution, the present disclosure provides a hydrogen conductivity table cation exchange resin regeneration system and method. The system and method of the present disclosure have the following advantages:

[0044] (1) The system of the present disclosure can be directly connected to the cation exchange column to regenerate the failed cation exchange resin, eliminating the process of moving the cation exchange resin out of the regeneration and into the cation exchange column, and avoiding the possibility of introducing air bubbles when the regenerated cation exchange resin is moved in.

[0045] (2) The system of the present disclosure can monitor the quality of the regenerated cation exchange resin in real time, and thus can monitor the regeneration degree of the cation exchange resin in real time, ensuring that the regeneration degree of the failed cation exchange resin is above 98%.

[0046] (3) The system of the present disclosure is simple, flexible and convenient to operate when regenerating cation exchange resin.

[0047] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments section. BRIEF DESCRIPTION OF DRAWINGS

[0048] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and together with the following specific embodiments, serve to explain the present disclosure but do not constitute a limitation thereof. In the drawings:

[0049] Figure 1 is a structural schematic diagram of one specific embodiment of the cation exchange resin regeneration system of the present disclosure.

[0050] Figure 2 is a structural schematic diagram of a quality monitoring unit of a cation exchange resin regeneration system of the present disclosure.

[0051] Explanation of reference signs

[0052] 1 solution tank 2 demineralized water tank 3 cation exchange column

[0053] 4 first conductivity meter 5 second conductivity meter 6 first regulating valve

[0054] 7 first peristaltic pump 8 second regulating valve 9 air regulating valve

[0055] 10 air pump 11 second blowdown regulating valve 12 third regulating valve

[0056] 13 second peristaltic pump 14 first blowdown regulating valve 15 fourth regulating valve

[0057] 16 water washing branch regulating valve 17 strain resistance wire 18 resistance pressure sensing module

[0058] 19 fixed beam

[0059] 101 first main pipeline 102 second blowdown branch 103 air branch

[0060] 104 second main pipeline 105 first blowdown branch 106 second water washing branch DETAILED DESCRIPTION

[0061] The detailed description of the specific embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0062] In the present disclosure, the orientation words such as "top, bottom" used without the opposite description generally refer to the top and bottom of the device in the normal use state, for example, referring to the figure surface direction of Figure 1 .

[0063] The first aspect of the present disclosure provides a hydrogen conductivity meter cation exchange resin regeneration system, which comprises a regeneration unit, a water washing unit, a cation exchange column 3, a quality monitoring unit, and a data processing and control unit.

[0064] As Figure 1As shown, the regeneration unit includes a solution tank 1, a first conductivity meter 4, a first drain branch 105, and a first main pipeline 101. The first main pipeline 101 is connected between the outlet of the solution tank 1 and the bottom opening of the cation exchange column 3, and the first main pipeline 101 is a flexible pipeline. The inlet of the first drain branch 105 is in fluid communication with the top opening of the cation exchange column, and the first conductivity meter 4 is disposed on the first drain branch 105.

[0065] The water washing unit includes a demineralized water tank 2 and a second main pipeline 104, which is connected between the outlet of the demineralized water tank 2 and the top opening of the cation exchange column 3; the second main pipeline 104 is a flexible pipeline.

[0066] The side walls of the solution tank 1 and the demineralized water tank 2 are each independently equipped with graduations;

[0067] like Figure 2 As shown, the quality monitoring unit includes a weighing sensor, which includes a fixed beam 19, a resistance pressure sensing module 18, and a signal processing and display module. The fixed beam 19 is arranged horizontally along its axis, and the resistance pressure sensing module 18 is arranged vertically along its axis. The upper end of the resistance pressure sensing module 18 is connected to the fixed beam 19, and the lower end of the resistance pressure sensing module 18 is detachably connected to the upper end of the cation exchange column 3. The signal processing and display module is electrically connected to the resistance pressure sensing module 18 and is used to process the electrical signal from the pressure sensing module and output the measurement result.

[0068] The quality monitoring unit and the first conductivity meter are each independently connected to the data processing and control unit. The data processing and control unit is used to calculate the regeneration degree of the cation exchange resin based on the mass number from the quality monitoring unit and the discharge conductivity from the first conductivity meter 4, so as to control the first main pipeline 101 and the second main pipeline 104 to be in an open or closed state.

[0069] In this disclosure, the system can be directly connected to a cation exchange column to regenerate spent cation exchange resin, eliminating the process of removing the cation exchange resin from the regeneration column and then transferring it back in, thus avoiding the possibility of introducing air bubbles during the transfer of the regenerated cation exchange resin. The system uses a quality monitoring unit, a data processing and control unit to monitor the quality of the regenerated cation exchange resin in real time. After data processing, the regeneration degree of the spent cation exchange resin is calculated, and the regeneration degree is monitored in real time, ensuring that the regeneration degree of the spent cation exchange resin is above 98%. This system is more flexible, has a more reasonable configuration, and is beneficial for the regeneration of spent cations.

[0070] In the present disclosure, the solution tank and the desalted water tank are each independently provided with a scale to ensure flexibility and accuracy of solution configuration in the solution tank and desalted water configuration in the desalted water tank; in particular, different concentrations of solutions can be configured to regenerate the failed cation according to the amount of failed cation exchange resin and the characteristics of the resin, and the concentration or amount of desalted water can also be controlled according to the different concentrations of solutions used in the regeneration process or according to the user's needs. The present disclosure does not make specific limitations on the connection mode of the lower end of the resistance pressure sensing module and the upper end of the cation exchange column.

[0071] In an embodiment of the present disclosure, a first regulating valve 6, a first peristaltic pump 7 and a second regulating valve 8 are sequentially arranged on the first main pipeline 101 in the direction of medium flow; wherein the first regulating valve 6 and the first peristaltic pump 7 are close to the outlet of the solution tank 1, and the second regulating valve 8 is close to the bottom opening of the cation exchange column 3.

[0072] In the present disclosure, the first regulating valve, the first peristaltic pump and the second regulating valve can all be used by those skilled in the art, wherein the first regulating valve and the second regulating valve can be used to control the first main pipeline to be in an open or closed state, so that the solution flows through the first main pipeline from the bottom of the cation exchange column into the cation exchange column; the first peristaltic pump has a forward and reverse rotation function, and its speed can be adjusted, so that the first peristaltic pump can control the solution in the solution tank to flow through the cation exchange column at a specific flow rate, completing the regeneration of the cation exchange resin in the cation exchange column.

[0073] In an embodiment of the present disclosure, a first blowdown regulating valve 14 is further arranged on the first blowdown branch 105 and located at the inlet of the first conductivity meter 4. In the present disclosure, the first blowdown regulating valve can be used by those skilled in the art, wherein the first blowdown regulating valve is used to control the first blowdown branch to be in an open or closed state, so that the blowdown discharged from the top of the cation exchange column flows through the first blowdown branch for blowdown treatment; before the blowdown is discharged, the blowdown enters the first conductivity meter to detect the conductivity of the blowdown, and when the conductivity is stable for 3-5 minutes, it is judged whether the regeneration degree of the cation and the cleaning of the regenerated solution are clean.

[0074] In an embodiment of the present disclosure, the water washing unit further comprises a second blowdown branch 102, an inlet of the second blowdown branch 102 being in fluid communication with the bottom opening of the cation exchange column, and a second conductivity meter 5 disposed on the second blowdown branch 102; a third regulating valve 12, a second peristaltic pump 13 and a fourth regulating valve 15 are sequentially disposed on a second main pipeline 104 in the direction of medium flow; wherein the third regulating valve 12 and the second peristaltic pump 13 are close to the outlet of the demineralized water tank 2, and the fourth regulating valve 15 is close to the top opening of the cation exchange column 3.

[0075] In the present disclosure, the third regulating valve, the second peristaltic pump and the fourth regulating valve can all be used by those skilled in the art, wherein the third regulating valve and the fourth regulating valve can be used to control the second main pipeline to be in an open or closed state, so as to make the demineralized water flow into the cation exchange column from the top or the bottom of the cation exchange column through the second main pipeline; the second peristaltic pump has a forward and reverse rotation function, and its rotation speed can be adjusted, so that the second peristaltic pump can control the demineralized water to flow through the cation exchange column at a specific flow rate, thereby completing the cleaning of the regenerated cation exchange resin in the cation exchange column.

[0076] In an embodiment of the present disclosure, a second blowdown regulating valve 11 is further disposed on the second blowdown branch 102 and located at the inlet of the second conductivity meter 5. In the present disclosure, the second blowdown regulating valve can be used by those skilled in the art, wherein the second blowdown regulating valve is used to control the second blowdown branch to be in an open or closed state, so as to make the blowdown liquid discharged from the bottom of the cation exchange column flow through the second blowdown branch for discharge treatment. Before the blowdown liquid is discharged, the blowdown liquid enters the second conductivity meter to detect the conductivity of the waste liquid. When the conductivity is stable for 3-5 minutes, it is judged whether the cation is clean or not. For example, the conductivity of the blowdown liquid after the cation exchange resin is cleaned can be 2-8 μS / cm.

[0077] In an embodiment of the present disclosure, the water washing unit further comprises a second water washing branch 106; the second water washing branch 106 is connected between the first main pipeline 101 and the second main pipeline 104, and a water washing branch regulating valve 16 is disposed on the second water washing branch 106; the control unit is signal-connected with the second conductivity meter, so as to receive the real-time conductivity signal of the second conductivity meter and adjust the second main pipeline 104 and / or the second water washing branch 106 to be in an open or closed state according to the real-time conductivity signal.

[0078] In the present disclosure, a second water washing branch is arranged in the water washing unit, so that the desalinated water can sequentially flow through the second water washing branch and the first main pipeline, and then enter the cation exchange column from the bottom of the cation exchange column, and further clean the regenerated cation exchange resin from the bottom of the cation exchange column upwards, thereby further ensuring that the regenerated cation exchange resin is completely cleaned.

[0079] In an embodiment of the present disclosure, the system further comprises an air branch 103, an outlet of the air branch 103 being in fluid communication with an opening at the bottom of the cation exchange column; a gas pump 10 and an air regulating valve 9 are arranged in sequence on the air branch 103 in the direction of air entering.

[0080] In the present disclosure, the air regulating valve can be commonly used by those skilled in the art; the rotating speed of the air peristaltic valve can be adjusted, so as to introduce compressed air into the cation exchange column from the bottom of the cation exchange column to disturb the cation exchange resin therein, so that the dead angle in the cation exchange resin layer can be eliminated, so as to facilitate the solution in the solution tank and the desalinated water to completely flow through the cation exchange resin, further improve the regeneration degree of the failed cation exchange resin, and ensure that the regenerated cation exchange resin is completely cleaned.

[0081] In an embodiment of the present disclosure, the resistance pressure sensing module 18 comprises a strain resistance wire 17 and an elastic body, the strain resistance wire being adhered to the elastic body in the length direction; an electric resistance signal output end is arranged at the top of the strain resistance wire 17, for outputting an electric signal, the electric resistance signal output end being electrically connected with the signal processing and display module.

[0082] In the present disclosure, the strain resistance wire can be a metal resistance wire commonly used in the art, for example, can be a constantan wire, a nickel-chromium wire, or a nickel-chromium-aluminum wire and a nickel-iron alloy wire; the elastic body can be a material with elasticity commonly used in the art, which will not be described here. The elastic body and the strain resistance wire can be wrapped by a conventional method in the art, for example, can be wrapped by an adhesive method. When the elastic body does not bear a load, the resistance pressure sensing module is in a balanced state, and the output voltage is 0; when the elastic body bears a load, the elastic body is deformed due to the stretching of gravity, causing the change of the strain resistance wire, the strain resistance wire is stretched and thinned under the action of gravity, the resistance increases, and the output voltage signal becomes larger.

[0083] In an embodiment of the present disclosure, a first reducing joint is arranged at the connection between the first main pipe 101 and the bottom opening of the cation exchange column 3, and a second reducing joint is arranged at the connection between the second main pipe 104 and the top opening of the cation exchange column 3; wherein the diameters of the first and second reducing joints are each selected from one or more of 6 mm, 8 mm and 10 mm. In the above embodiment, the reducing joints can achieve quick connection of the regeneration unit with various specifications and models of ion exchange columns used in the field.

[0084] In an embodiment of the present disclosure, the materials of the first main pipe 101 and the second main pipe 104 are each independently selected from one or more of a silica gel pipe, a PC pipe and a PE pipe.

[0085] In an embodiment of the present disclosure, a flow meter is arranged in each of the solution tank 1 and the desalted water tank 1; in the present disclosure, the control unit is in signal connection with the flow meters in the solution tank 1 and the desalted water tank 2, so as to receive real-time flow signals of the solution from the solution tank 1 or the desalted water from the desalted water tank 2 flowing through the cation exchange column 3 and adjust the first main pipe 101, the second main pipe 104 or the second water washing branch 106 to be in an open or closed state according to the real-time flow signals.

[0086] In an embodiment of the present disclosure, the cation exchange column is a plurality of, and the plurality of cation exchange columns are arranged in parallel; preferably, the number of the cation exchange columns is 1-5. In the present disclosure, the plurality of cation exchange columns can be arranged in parallel, so that the regeneration unit and the cleaning unit simultaneously regenerate and clean the invalid cation exchange resin in the plurality of cation exchange columns.

[0087] The second aspect of the present disclosure provides a method for regenerating hydrogen conductivity table cation exchange resin by using the system of the first aspect, which comprises the following steps:

[0088] S1, the solution in the solution tank 1 enters the cation exchange column to regenerate the invalid cation exchange resin, and at the same time, the mass monitoring unit is used to monitor the weight of the regenerated cation exchange column in real time; when the regeneration degree of the regenerated cation exchange resin is greater than 98%, the regeneration process is ended, and the treated cation exchange resin is obtained;

[0089] S2, switching the fluid medium to make the desalted water in the desalted water tank 2 enter the cation exchange column to wash the treated cation exchange resin, and the regenerated cation exchange resin is obtained.

[0090] In the present disclosure, the method of the present disclosure can monitor the weight of the cation exchange resin in the regeneration process in real time, the regeneration degree of the cation exchange resin is high, and the method of the present disclosure is simple, flexible and convenient to operate, can regenerate the cation exchange resin in multiple cation exchange columns, and saves time and manpower.

[0091] In an embodiment of the present disclosure, the regeneration degree of the regenerated cation exchange resin is obtained according to the following method:

[0092] Re is calculated by the formula Re=(M2 / V) / [(M1 / V)-(M2 / V)], when Re is greater than or equal to 16.5, it is judged that the regeneration degree of the regenerated cation exchange resin is greater than 98%; when Re is less than 16.5, it is judged that the regeneration degree of the regenerated cation exchange resin is less than 98%;

[0093] Wherein, M1 is the mass of the failed cation exchange column filled with desalted water; M2 is the mass of the regenerated cation exchange column after the effluent conductivity is stable for 3-5 minutes; V1 is the volume of the cation exchange resin column.

[0094] In the present disclosure, the effluent conductivity is stable for 3-5 minutes means that the change amount of the effluent conductivity in 3-5 minutes is ±5% of the average effluent conductivity value in 3-5 minutes.

[0095] In an embodiment of the present disclosure, in step S1, when the regeneration degree of the regenerated cation exchange resin is less than 98%, the solution in the solution tank 1 is introduced into the cation exchange column to regenerate the cation exchange resin with a regeneration degree of less than 98%, and the mass monitoring unit is used to monitor the weight of the regenerated cation exchange column in real time until the regeneration degree of the regenerated cation exchange resin is greater than 98%.

[0096] In one embodiment of the present disclosure, step S1 further comprises: during the regeneration process, the gas pump 10 is used to intermittently introduce gas into the cation exchange column; wherein the time for each gas introduction is 3-5s, the time interval for gas introduction is 15-20s, and the flow rate of the gas is 0.1-0.5L / s; and step S2 further comprises: during the water washing process, the gas pump 10 is used to intermittently introduce gas into the cation exchange column; wherein the time for each gas introduction is 3-5s, the time interval for gas introduction is 15-20s. In the present disclosure, gas can be intermittently introduced into the cation exchange column to disturb the cation exchange resin therein, which can eliminate the dead angles in the cation exchange resin layer, so as to facilitate the solution in the solution tank and the desalted water to completely flow through the cation exchange resin, further improve the regeneration degree of the failed cation exchange resin, and ensure that the regenerated cation exchange resin is clean. The present disclosure does not make specific limitations on the introduced gas, as long as it does not react with the cation exchange resin, for example, it can be air, nitrogen, etc.

[0097] In one embodiment of the present disclosure, the solution in the solution tank 1 is hydrochloric acid.

[0098] According to the present disclosure, the concentration of the solution in the solution tank can be varied within a large range. Different concentrations can be configured according to the weight and characteristics of the failed cation exchange resin. In one preferred embodiment of the present disclosure, the mass concentration of the solution is 3-5%.

[0099] According to the present disclosure, the flow rate of the solution in the solution tank and the desalted water in the desalted water tank into the cation exchange column can be varied within a large range, and the flow rate can be controlled according to the weight and characteristics of the failed cation exchange resin. In one specific embodiment of the present disclosure, the flow rate of the solution in the solution tank 1 into the cation exchange column 3 is 100-200mL / min; and the flow rate of the desalted water in the desalted water tank 2 into the cation exchange column 3 is 100-150mL / min.

[0100] The present disclosure will be further described by way of examples, but the present disclosure is not limited in any way by the examples.

[0101] As shown in Figure 1 and Figure 2 , the system comprises a regeneration unit, a water washing unit, a cation exchange column 3, a mass monitoring unit, and a data processing and control unit;

[0102] As shown in Figure 1As shown, the regeneration unit comprises a solution tank 1, a first conductivity meter 4, a first blow-off branch 105 and a first main pipeline 101, the first main pipeline 101 is connected between the outlet of the solution tank 1 and the bottom opening of the cation exchange column 3, a first reducing joint is arranged on the first main pipeline 101 at the connection with the bottom opening of the cation exchange column 3, and the first main pipeline 101 is a flexible pipeline; the inlet of the first blow-off branch 105 is in fluid communication with the top opening of the cation exchange column, and the first conductivity meter 4 is arranged on the first blow-off branch 105;

[0103] The water washing unit comprises a desalted water tank 2 and a second main pipeline 104, the second main pipeline 104 is connected between the outlet of the desalted water tank 2 and the top opening of the cation exchange column 3; a second reducing joint is arranged on the second main pipeline 104 at the connection with the top opening of the cation exchange column 3, and the second main pipeline 104 is a flexible pipeline;

[0104] As shown, Figure 2 The mass monitoring unit comprises a load cell, the load cell comprises a fixed beam 19, a resistance pressure sensing module 18, and a signal processing and display module; the fixed beam 19 is arranged horizontally in the axial direction, the resistance pressure sensing module 18 is arranged vertically in the axial direction, the upper end of the resistance pressure sensing module 18 is connected with the fixed beam 19, and the lower end of the resistance pressure sensing module 18 is detachably connected with the upper end of the cation exchange column 3; the signal processing and display module is electrically connected with the resistance pressure sensing module 18, for processing the electrical signal from the pressure sensing module and outputting the measurement result;

[0105] The mass monitoring unit and the first conductivity meter are each independently signal-connected with a data processing and control unit, the data processing and control unit is used for calculating the regeneration degree of the cation resin according to the mass from the mass monitoring unit and the blow-off conductivity from the first conductivity meter 4, so as to control the first main pipeline 101 and the second main pipeline 104 to be in an open or closed state.

[0106] As shown, Figure 1 The first adjusting valve 6, the first peristaltic pump 7 and the second adjusting valve 8 are arranged in sequence on the first main pipeline 101 in the direction of medium flow; wherein, the first adjusting valve 6 and the first peristaltic pump 7 are close to the outlet of the solution tank 1, and the second adjusting valve 8 is close to the bottom opening of the cation exchange column 3; the first blow-off adjusting valve 14 is further arranged on the first blow-off branch 105 and located at the inlet of the first conductivity meter 4.

[0107] The water washing unit further comprises a second blowdown branch 102, an inlet of the second blowdown branch 102 being in fluid communication with the bottom opening of the cation exchange column, and a second conductivity meter 5 arranged on the second blowdown branch 102; a third regulating valve 12, a second peristaltic pump 13 and a fourth regulating valve 15 are arranged on the second main pipeline 104 in sequence along the direction of medium flow; wherein the third regulating valve 12 and the second peristaltic pump 13 are close to the outlet of the desalted water tank 2, and the fourth regulating valve 15 is close to the top opening of the cation exchange column 3.

[0108] A second blowdown regulating valve 11 is further arranged on the second blowdown branch 102 and located at the inlet of the second conductivity meter 5.

[0109] The water washing unit further comprises a second water washing branch 106; the second water washing branch 106 is connected between the first main pipeline 101 and the second main pipeline 104, and a water washing branch regulating valve 16 is arranged on the second water washing branch 106; the control unit is signal connected with the second conductivity meter, so as to receive the real-time conductivity signal of the second conductivity meter and adjust the second main pipeline 104 and / or the second water washing branch 106 to be in an open or closed state according to the real-time conductivity signal.

[0110] The system further comprises an air branch 103, an outlet of the air branch 103 being in fluid communication with the bottom opening of the cation exchange column; a gas pump 10 and an air regulating valve 9 are arranged on the air branch 103 in sequence along the direction of air entering.

[0111] As shown in FIG. 1, the system comprises a solution tank 1, a water washing unit, a control unit and a signal processing and display module. Figure 2 As shown in FIG. 2, the resistance pressure sensing module 18 comprises a strain resistance wire 17 and an elastomer wrapped outside the strain resistance wire 17; a resistance signal output end 19 is connected to the top of the strain resistance wire 17, so as to electrically connect the resistance pressure sensing module 18 with the signal processing and display module.

[0112] Embodiment 1

[0113] The system of the present disclosure is used to regenerate the hydrogen conductivity meter cation exchange resin. The specific steps are as follows:

[0114] S1, the mass concentration of 5% hydrochloric acid solution in the solution tank is made to enter the cation exchange column at a flow rate of 150 mL / min to regenerate the failed cation resin, and the mass monitoring unit is used to monitor the weight of the regenerated cation exchange column in real time;

[0115] The gas pump is used to intermittently introduce air into the cation exchange column, the time for a single air introduction is 3 s, the time interval for air introduction is 15 s, and the flow rate of air is 0.1 L / s;

[0116] The mass monitoring unit monitors the weight of the regenerated cation exchange column in real time. When the effluent conductivity of the regenerated cation exchange column is stable for 3 minutes, the mass M2 of the regenerated cation exchange column is 2567.54, and Re is 28.98, indicating that the regeneration degree of the regenerated cation exchange resin is greater than 98%. Stop passing hydrochloric acid to obtain the treated cation exchange resin.

[0117] S2, switch the fluid medium to make the desalted water in the desalted water tank enter the cation exchange column from the top and bottom of the ion exchange column at a flow rate of 100 mL / min, respectively, to water wash the treated cation exchange resin. Intermittently pass air into the cation exchange column using an air pump, the single air passing time is 3 s, the air passing time interval is 15 s, and the air flow is 0.1 L / s; the effluent conductivity is 6 μS / cm, stop passing desalted water, and obtain the regenerated cation exchange resin.

[0118] The data monitored by the mass monitoring unit for the regenerated cation exchange column is shown in Table 1.

[0119] Table 1

[0120] [M1(g)] [M2(g)] V(L) Re Example 1 2656.14 2567.54 2884.87 28.98

[0121] The system of the present disclosure has a mass monitoring unit, which can monitor the weight of the cation exchange resin, thereby achieving dynamic, real-time and continuous monitoring of the regeneration degree of the resin. When Re is 16.5 or more during the regeneration process, it is determined that the regeneration degree of the cation exchange resin is greater than 98%, and sufficient regeneration of the cation resin can be achieved.

[0122] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0123] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0124] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A hydrogen conductivity meter cation exchange resin regeneration system, characterized in that, The system includes a regeneration unit, a water washing unit, a cation exchange column (3), a quality monitoring unit, and a data processing and control unit; The regeneration unit includes a solution tank (1), a first conductivity meter (4), a first drain branch (105), and a first main pipeline (101). The first main pipeline (101) is connected between the outlet of the solution tank (1) and the bottom opening of the cation exchange column (3). The first main pipeline (101) is a flexible pipeline. The inlet of the first drain branch (105) is in fluid communication with the top opening of the cation exchange column. The first conductivity meter (4) is installed on the first drain branch (105). The water washing unit includes a demineralized water tank (2) and a second main pipeline (104), the second main pipeline (104) being connected between the outlet of the demineralized water tank (2) and the top opening of the cation exchange column (3); the second main pipeline (104) is a flexible pipeline; The solution tank (1) and the demineralized water tank (2) each have independently set graduations on their side walls; The quality monitoring unit includes a weighing sensor, which includes a fixed beam (19), a resistance pressure sensing module (18), and a signal processing and display module. The fixed beam (19) is arranged horizontally along its axis, and the resistance pressure sensing module (18) is arranged vertically along its axis. The upper end of the resistance pressure sensing module (18) is connected to the fixed beam (19), and the lower end of the resistance pressure sensing module (18) is detachably connected to the upper end of the cation exchange column (3). The signal processing and display module is electrically connected to the resistance pressure sensing module (18) and is used to process the electrical signals from the resistance pressure sensing module and output the measurement results. The quality monitoring unit and the first conductivity meter are each independently connected to the data processing and control unit. The data processing and control unit is used to calculate the regeneration degree of the cation exchange resin based on the mass number from the quality monitoring unit and the discharge conductivity from the first conductivity meter (4), so as to control the first main pipeline (101) and the second main pipeline (104) to be in an open or closed state. The degree of regeneration of the regenerated cation exchange resin was obtained using the following method: The formula Re = (M2 / V) / [(M1 / V)-(M2 / V)] is used to calculate Re. When Re is above 16.5, the regeneration degree of the cation exchange resin after regeneration is judged to be greater than 98%; when Re is less than 16.5, the regeneration degree of the cation exchange resin after regeneration is judged to be less than 98%. Where M1 is the mass of the exhausted cation exchange column filled with demineralized water; M2 is the mass of the cation exchange column after regeneration treatment, after the discharge conductivity has stabilized for 3-5 minutes; and V is the volume of the cation exchange resin column.

2. The system according to claim 1, characterized in that, A first regulating valve (6), a first peristaltic pump (7), and a second regulating valve (8) are sequentially arranged along the direction of medium flow on the first main pipeline (101). The first regulating valve (6) and the first peristaltic pump (7) are located near the outlet of the solution tank (1), and the second regulating valve (8) is located near the bottom opening of the cation exchange column (3). A first sewage regulating valve (14) is also provided on the first sewage branch (105), and is located at the inlet of the first conductivity meter (4).

3. The system according to claim 1, characterized in that, The water washing unit also includes a second sewage branch (102) and a second conductivity meter (5). The inlet of the second sewage branch (102) is in fluid communication with the bottom opening of the cation exchange column, and the second conductivity meter (5) is installed on the second sewage branch (102). A third regulating valve (12), a second peristaltic pump (13) and a fourth regulating valve (15) are sequentially arranged along the direction of medium flow on the second main pipeline (104). The third regulating valve (12) and the second peristaltic pump (13) are located near the outlet of the demineralized water tank (2), and the fourth regulating valve (15) is located near the top opening of the cation exchange column (3). A second sewage regulating valve (11) is also provided on the second sewage branch (102), and is located at the inlet of the second conductivity meter (5).

4. The system according to claim 3, characterized in that, The washing unit also includes a second washing branch (106); the second washing branch (106) is connected between the first main line (101) and the second main line (104), and a washing branch regulating valve (16) is provided on the second washing branch (106). The control unit is connected to the second conductivity meter signal to receive the real-time conductivity signal of the second conductivity meter and adjust the second main pipeline (104) and / or the second water washing branch (106) to the open or closed state according to the real-time conductivity signal.

5. The system according to claim 1, characterized in that, The system also includes an air branch (103), the outlet of which is in fluid communication with the bottom opening of the cation exchange column; An air pump (10) and an air regulating valve (9) are sequentially arranged on the air branch (103) along the direction of air entry.

6. The system according to claim 1, characterized in that, The resistance pressure sensing module (18) includes a strain resistance wire (17) and an elastic body, wherein the strain resistance wire is adhered to the elastic body along its length. A resistance signal output terminal is provided at the top of the strain resistance wire (17) for outputting an electrical signal. The resistance signal output terminal is electrically connected to the signal processing and display module.

7. The system according to claim 1, characterized in that, A first reducing connector is provided at the connection between the first main pipeline (101) and the bottom opening of the cation exchange column (3), and a second reducing connector is provided at the connection between the second main pipeline (104) and the top opening of the cation exchange column (3). The diameters of the first reducing connector and the second reducing connector are each selected from one or more of 6mm, 8mm and 10mm. The materials of the first main pipeline (101) and the second main pipeline (104) are each independently selected from one or more of silicone tubes, PC tubes and PE tubes.

8. The system according to claim 1, characterized in that, Each of the solution tank (1) and the demineralized water tank (2) is equipped with a flow meter independently; The control unit is connected to the flow meter signal in the solution tank (1) and the demineralized water tank (2) to receive the real-time flow signal of the solution from the solution tank (1) or the demineralized water from the demineralized water tank (2) flowing through the cation exchange column (3) and adjust the first main pipeline (101), the second main pipeline (104) or the second water washing branch (106) to the open or closed state according to the real-time flow signal.

9. The system according to claim 1, characterized in that, There are multiple cation exchange columns, and the multiple cation exchange columns are arranged in parallel.

10. The system according to claim 9, characterized in that, The number of cation exchange columns is 1-5.

11. A method for regenerating a hydrogen conductivity meter cation exchange resin using the system described in any one of claims 1-10, characterized in that, The method includes the following steps: S1. The solution in the solution tank (1) is introduced into the cation exchange column to regenerate the failed cation exchange resin. At the same time, the weight of the regenerated cation exchange column is monitored in real time by a quality monitoring unit. When the regeneration degree of the regenerated cation exchange resin is greater than 98%, the regeneration process ends and the treated cation exchange resin is obtained. S2. Switch the fluid medium to allow the demineralized water in the demineralized water tank (2) to enter the cation exchange column to wash the treated cation exchange resin with water, thereby obtaining regenerated cation exchange resin.

12. The method according to claim 11, wherein, The degree of regeneration of the regenerated cation exchange resin is obtained according to the following method: The formula Re = (M2 / V) / [(M1 / V)-(M2 / V)] is used to calculate Re. When Re is above 16.5, the regeneration degree of the cation exchange resin after regeneration is judged to be greater than 98%; when Re is less than 16.5, the regeneration degree of the cation exchange resin after regeneration is judged to be less than 98%. Where M1 is the mass of the exhausted cation exchange column filled with demineralized water; M2 is the mass of the cation exchange column after regeneration treatment, after the discharge conductivity has stabilized for 3-5 minutes; and V is the volume of the cation exchange resin column.

13. The method according to claim 11 or 12, wherein, In step S1, when the regeneration degree of the regenerated cation exchange resin is below 98%, the solution in the solution tank (1) is introduced into the cation exchange column to regenerate the cation exchange resin with a regeneration degree below 98%. At the same time, the weight of the regenerated cation exchange column is monitored in real time by a quality monitoring unit until the regeneration degree of the regenerated cation exchange resin is greater than 98%.

14. The method according to claim 11, wherein, Step S1 further includes: during the regeneration process, a gas pump (10) is used to intermittently introduce gas into the cation exchange column; wherein the time for a single gas introduction is 3-5s, the time interval for gas introduction is 15-20s, and the gas flow rate is 0.1-0.5L / s. Step S2 further includes: during the water washing process, a gas pump (10) is used to intermittently introduce gas into the cation exchange column; wherein the time for a single gas introduction is 3-5s, the time interval for gas introduction is 15-20s, and the gas flow rate is 0.1-0.5L / s.

15. The method according to claim 11, characterized in that, The solution in the solution tank (1) is hydrochloric acid; the mass concentration of the solution is 3-5%; The flow rate of the solution in the solution tank (1) into the cation exchange column (3) is 100-200 mL / min; The flow rate of the demineralized water in the demineralized water tank (2) into the cation exchange column (3) is 100-150 mL / min.

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