CN117599862A - Ion exchange regenerated resin bed, ion exchange resin scrubbing process and regeneration process - Google Patents
Ion exchange regenerated resin bed, ion exchange resin scrubbing process and regeneration process Download PDFInfo
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- CN117599862A CN117599862A CN202311840129.9A CN202311840129A CN117599862A CN 117599862 A CN117599862 A CN 117599862A CN 202311840129 A CN202311840129 A CN 202311840129A CN 117599862 A CN117599862 A CN 117599862A
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- 238000011069 regeneration method Methods 0.000 title claims abstract description 169
- 230000008929 regeneration Effects 0.000 title claims abstract description 168
- 239000011347 resin Substances 0.000 title claims abstract description 149
- 229920005989 resin Polymers 0.000 title claims abstract description 149
- 238000005201 scrubbing Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000008569 process Effects 0.000 title claims abstract description 43
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000003456 ion exchange resin Substances 0.000 title claims abstract description 33
- 229920003303 ion-exchange polymer Polymers 0.000 title claims abstract description 33
- 238000005342 ion exchange Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 127
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 230000001172 regenerating effect Effects 0.000 claims abstract 5
- 239000002585 base Substances 0.000 claims description 75
- 238000011010 flushing procedure Methods 0.000 claims description 33
- 238000007599 discharging Methods 0.000 claims description 23
- 238000011001 backwashing Methods 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000004519 grease Substances 0.000 abstract description 11
- 239000000725 suspension Substances 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 description 15
- 150000002500 ions Chemical class 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 150000002632 lipids Chemical class 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052664 nepheline Inorganic materials 0.000 description 2
- 239000010434 nepheline Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/60—Cleaning or rinsing ion-exchange beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/50—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The present application provides an ion exchange regeneration resin bed, an ion exchange resin scrubbing process and a regeneration process, the ion exchange regeneration resin bed comprising: the device comprises a regeneration bed, a fat outlet valve, a bottom discharge valve, an air inlet valve, a water inlet valve, a fat inlet valve, an air outlet valve, a middle discharge valve, a regeneration liquid valve, an acid-base inlet valve and an acid-base metering box, wherein the fat outlet valve, the bottom discharge valve, the air inlet valve, the water inlet valve, the fat inlet valve, the air outlet valve, the middle discharge valve, the regeneration liquid valve, the acid-base metering box and the acid-base metering box are arranged at the bottom of the regeneration bed. The grease outlet valve is positioned on a first bottom pipeline at the bottom of the regeneration bed, the air inlet valve is positioned on a branch pipeline between one end of the first bottom pipeline connected with the regeneration bed and the grease outlet valve, and the bottom valve is positioned on a second bottom pipeline at the bottom of the regeneration bed. The fat outlet valve is configured to inject demineralized water when opened to lift the resin with the demineralized water and air, or to discharge the resin when opened. The resin scrubbing efficiency and the resin regeneration quality are improved by arranging the fat outlet valve for multiple purposes and adopting the gas suspension scrubbing and regenerating process.
Description
Technical Field
The application belongs to the technical field of ion exchange, and particularly relates to an ion exchange regenerated resin bed, an ion exchange resin scrubbing process and a regeneration process.
Background
Taking the nepheline nuclear power as an example, a condensate polishing system is arranged in a three-loop of the nepheline nuclear power. For removing ionic and suspended impurities in the condensed water, and ensuring that the water quality of the water supplied by the steam generator is reached. In the starting stage of the unit, the investment of the condensate water fine treatment system can enable condensate water to reach the recovery index faster, thereby reducing the discharge amount of the condensate water and shortening the starting time of the unit. During the start-up phase or normal operation of the unit, the investment of the condensate polishing system can remove corrosion products formed by the thermodynamic system during the normal operation or start-up and stop of the unit, and provide feed water with extremely low content of suspended substances (such as iron, copper oxide and other fine particles) for the evaporator. During normal operation of the unit, impurities entering condensation water from the water side or the steam side of the condenser due to micro leakage can be removed, so that the water quality of the feed water is ensured, and the water chemistry requirement of a thermodynamic system is met. When the condenser leaks slightly, the water quality of the feed water can be prevented from being influenced by the leakage of the condenser in a short time as an emergency measure, and the treatment of leakage accidents is facilitated, so that the aim of safely operating the steam generator and prolonging the service life is fulfilled.
During operation, the equipment is required to scrub and regenerate the resin because a large amount of suspended matters are trapped in the equipment during continuous use, so that the running resistance of the equipment is increased, and the electric conductivity is increased. The resin scrubbing mainly uses aerodynamic force to blow off impurities on the surface of the resin layer, and makes resin particles mutually rub under the action of water, thereby achieving the purpose of cleaning the resin. By utilizing the resin exchange principle, a certain amount of acid and alkali is injected to regenerate and revive the resin, so that the exchange capacity of the resin for adsorbing impurity ions is obtained again.
And part of power plants adopt a non-disturbance regeneration mode. FIG. 1 shows a schematic diagram of a resin bed of a power plant. As shown in fig. 1, taking air scrubbing as an example, the air scrubbing step is typically: and 1, before the air scrubbing operation, in order to prevent the resin from being damaged due to the excessively high air flow rate, firstly, reducing the liquid level to a position 10-15 cm away from the upper part of the resin. Then the compressed air valve and the top emptying valve are slowly opened for backwashing and scrubbing. Step 2, air scrubbing and backwashing are carried out for 5min, wherein the air inlet time is preferably 2-4 min each time; step 3, repeating scrubbing and sedimentation operations for 10-20 times; step 4, performing backwashing operation, and if the water is clear, performing scrubbing-sedimentation-backwashing operation again; and if more impurities remain in the final effluent, repeating the steps 2 to 4 until the resin is cleaned. However, this type of scrubbing has a longer resin scrubbing time and a lower resin regeneration quality.
Disclosure of Invention
In view of the foregoing, embodiments of the present application are directed to providing an ion exchange regeneration resin bed, an ion exchange resin scrubbing process and a regeneration process, which solve the problems of longer resin scrubbing time and lower resin regeneration quality in the prior art by providing a multi-purpose one-valve of a fat outlet valve and adopting an air-suspended scrubbing regeneration process.
In a first aspect the present application provides an ion exchange regenerated resin bed comprising: the device comprises a regeneration bed, a fat outlet valve, a bottom discharge valve, an air inlet valve, a water inlet valve, a fat inlet valve, an air outlet valve, a middle discharge valve, a regeneration liquid valve, an acid-base inlet valve and an acid-base metering box, wherein the fat outlet valve, the bottom discharge valve, the air inlet valve, the water inlet valve, the fat inlet valve, the air outlet valve, the middle discharge valve, the regeneration liquid valve, the acid-base metering box and the acid-base metering box are arranged at the bottom of the regeneration bed. The grease outlet valve is positioned on a first bottom pipeline at the bottom of the regeneration bed, the air inlet valve is positioned on a branch pipeline between one end of the first bottom pipeline connected with the regeneration bed and the grease outlet valve, and the bottom valve is positioned on a second bottom pipeline at the bottom of the regeneration bed. The fat outlet valve is configured to inject demineralized water when opened to lift the resin with the demineralized water and air, or to discharge the resin when opened.
In the scheme, resin can be discharged after the resin outlet valve is opened, and desalted water is injected simultaneously in any one or more steps of the acid-base feeding step, the replacement step and the second rapid flushing step of the ion exchange resin regeneration process so as to lift the resin by using the desalted water and air, so that organic matters, impurity ion groups and tiny bubbles attached to the resin exchange boundary film in the ion exchange process are rapidly separated and are brought out of a regeneration bed, the resin scrubbing efficiency is improved, and the resin regeneration quality is improved.
In the ion exchange regenerated resin bed provided in the first aspect of the present application, the middle valve is located on one branch pipeline of the side pipeline on the side of the regenerated bed, starting from one end close to the side pipeline connected with the regenerated bed, and the regenerated liquid valve, the acid-base inlet valve and the acid-base metering box are located on the other branch pipeline of the side pipeline on the side of the regenerated bed in sequence.
In the ion exchange regenerated resin bed provided in the first aspect of the present application, the water inlet valve is located on a first top pipeline at the top of the regenerated bed, and the fat inlet valve and the exhaust valve are respectively located on two branch pipelines of a second top pipeline at the top of the regenerated bed.
A second aspect of the present application provides an ion exchange resin scrubbing process based on the ion exchange regenerated resin bed provided in the first aspect of the present application, the scrubbing process comprising: in the air scrubbing step of resin scrubbing, an air inlet valve in the ion exchange regenerated resin bed is opened to charge the regenerated bed with air; simultaneously, open the fat valve with predetermineeing the time interval, get into the demineralized water through the fat valve and carry out the countercurrent flushing and predetermineeing duration, utilize air and demineralized water to lift the resin in the regeneration bed to wash with the air, utilize the demineralized water to discharge debris simultaneously.
In the scrubbing process provided in the second aspect of the present application, the preset time interval ranges from 250 seconds to 350 seconds, and the preset duration ranges from 3 seconds to 10 seconds.
A third aspect of the present application provides an ion exchange resin regeneration process based on the ion exchange regeneration resin bed provided in the first aspect of the present application, the regeneration process comprising: in the acid-base feeding step of resin regeneration, an acid-base feeding valve in an ion exchange regenerated resin bed is opened, the acid-base concentration of a solution in the bed body of the regenerated bed is regulated to be within a preset acid-base concentration range, a fat outlet valve is opened at preset time intervals, and the fat outlet valve is used for feeding desalted water for countercurrent flushing for preset time; in the replacement step of resin regeneration, an acid-base inlet valve is closed, a grease outlet valve is opened at preset time intervals, and desalted water is fed through the grease outlet valve to carry out countercurrent flushing for preset time; and/or in the second rapid flushing step of resin regeneration, opening a water inlet valve and a bottom discharge valve, closing other valves, performing rapid flushing, simultaneously opening a fat outlet valve at preset time intervals, entering desalted water through the fat outlet valve, performing countercurrent flushing for preset time, and automatically ending the regeneration process after the conductivity is qualified.
In the regeneration process provided in the third aspect of the present application, before the acid-base advancing step of resin regeneration is performed, the regeneration process further includes: in the acid-base charging step of the acid-base tank for resin regeneration, charging acid and base into the acid-base metering tank; in the water filling step of the regenerated bed for resin regeneration, a water inlet valve and an exhaust valve are opened to fill water for the bed body of the regenerated bed, and when a tuning fork switch behind the exhaust valve detects that water flow is finished, the next step is automatically carried out; in the pre-injection step of resin regeneration, a regeneration liquid valve and a bottom discharge valve are opened, and a water inlet valve and a water outlet valve are closed to establish a regeneration liquid flow.
In the regeneration process provided in the third aspect of the present application, after the replacement step of performing resin regeneration, before the second rapid rinse step of performing resin regeneration, the regeneration process further includes: in the first rapid flushing step of resin regeneration, rapidly flushing the regeneration bed, opening a water inlet valve and a bottom discharge valve, and closing other valves to flush the resin and flush residual acid and alkali in the regeneration bed; in the step of refilling the regenerated bed for resin regeneration, opening a water inlet valve and an exhaust valve to fill the regenerated bed with water; in the top pressure drainage step of resin regeneration, an air inlet valve and a middle drainage valve are opened, the top pressure drainage is fast carried out, and the liquid level is controlled at a middle drainage position; in the air scrubbing step of resin regeneration, an air inlet valve and an air outlet valve are opened, and resin regeneration is performed and then scrubbing is performed; in the backwashing middle discharging step of resin regeneration, opening a fat inlet valve and a middle discharging valve to perform backwashing middle discharging; in the forward washing reverse discharging step of resin regeneration, a water inlet valve, a middle discharging valve and a bottom discharging valve are opened to perform forward washing middle discharging.
In the regeneration process provided in the third aspect of the present application, the injection rate of the desalted water was 100t/h, and the inflow rate of the air was 300m 3 /h。
In the regeneration process provided in the third aspect of the present application, the preset time interval ranges from 250 seconds to 350 seconds, and the preset duration ranges from 3 seconds to 10 seconds.
Drawings
FIG. 1 shows a schematic diagram of a resin bed of a power plant.
Fig. 2 is a schematic structural diagram of an ion exchange regenerated resin bed according to an embodiment of the present application.
Fig. 3 is a schematic ion exchange diagram of a resin in a gas suspension state according to an embodiment of the present application.
FIG. 4 is a schematic flow chart of an ion exchange resin scrubbing process based on an ion exchange regenerated resin bed according to an embodiment of the present application.
Fig. 5 is a schematic flow chart of an ion exchange resin scrubbing process based on an ion exchange regenerated resin bed according to another embodiment of the present application.
Fig. 6 is a schematic flow chart of an ion exchange resin regeneration process based on an ion exchange resin regeneration bed according to an embodiment of the present application.
Fig. 7 is a schematic flow chart of an ion exchange resin regeneration process based on an ion exchange resin regeneration bed according to another embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Fig. 2 is a schematic structural diagram of an ion exchange regenerated resin bed according to an embodiment of the present application. As shown in fig. 2, the ion exchange regenerated resin bed comprises: the device comprises a regeneration bed 1, a fat outlet valve 2, a bottom discharge valve 3, an air inlet valve 4, a water inlet valve 7, a fat inlet valve 8, an air outlet valve 9, a middle discharge valve 5, a regeneration liquid valve 6, an acid-base inlet valve 10 and an acid-base metering box 11, wherein the fat outlet valve 2, the bottom discharge valve 3 and the air inlet valve 4 are arranged at the bottom of the regeneration bed, the water inlet valve 8 and the air outlet valve 9 are arranged at the top of the regeneration bed, and the middle discharge valve 5, the regeneration liquid valve 6, the acid-base inlet valve 10 and the acid-base metering box 11 are arranged at the side surface of the regeneration bed. The grease outlet valve is positioned on a first bottom pipeline at the bottom of the regeneration bed, the air inlet valve is positioned on a branch pipeline between one end of the first bottom pipeline connected with the regeneration bed and the grease outlet valve, and the bottom valve is positioned on a second bottom pipeline at the bottom of the regeneration bed. The resin is discharged while the fat valve is opened, and the demineralized water is injected simultaneously to lift the resin with the demineralized water and air in an air scrubbing step of an ion exchange resin scrubbing process, and/or in any one or more of an acid-base feeding step, a displacement step, and a second rapid flushing step of an ion exchange resin regeneration process.
The acid-base metering box 11 may be set as an acid metering box or an alkali metering box according to actual requirements, and the acid-base inlet valve 10 may be set as an acid-base inlet valve or an alkali-base inlet valve according to the setting of the acid-base metering box 11.
According to the technical scheme provided by the embodiment of the application, resin can be discharged after the lipid outlet valve is opened, and desalted water can be injected simultaneously in any one or more steps of the acid-base feeding step, the replacement step and the second rapid flushing step of the ion exchange resin regeneration process so as to lift the resin by utilizing desalted water and air, so that organic matters attached to the resin exchange boundary film in the ion exchange process are realized, impurity ion groups and tiny bubbles fall off rapidly and are taken out of a regeneration bed, the resin scrubbing efficiency is improved, the resin regeneration quality is improved, the refined treatment operation efficiency is improved, the WANO chemical property of nuclear power is improved, the acid-base requirement of refined treatment is also reduced, the wastewater discharge is reduced, and the environmental protection pressure is lightened.
The positions of the middle discharge valve, the regeneration liquid valve, the acid-base inlet valve and the acid-base metering box can be set according to actual requirements. For example, in at least one embodiment of the present application, the middle drainage valve is positioned on one branch pipeline of the side pipeline at the side of the regeneration bed, and the regeneration liquid valve, the acid-base inlet valve and the acid-base metering box are sequentially positioned on the other branch pipeline of the side pipeline at the side of the regeneration bed from the end close to the connection of the side pipeline and the regeneration bed.
The positions of the water inlet valve, the fat inlet valve and the exhaust valve can be set according to actual requirements. For example, in at least one embodiment of the present application, the inlet valve is located on a first top line at the top of the regeneration bed and the inlet and outlet valves are each located on two branch lines of a second top line at the top of the regeneration bed.
Fig. 3 is a schematic ion exchange diagram of a resin in a gas suspension state according to an embodiment of the present application. As shown in fig. 3, a refers to an ion exchange resin, b refers to exchangeable impurity ions (na+, ca+), c refers to micro bubbles attached in a boundary water film, d refers to hydrogen ions ionized from a regenerated liquid, e refers to impurity ion groups accumulated in the boundary water film, f refers to the boundary water film, g refers to a change in size of the boundary of the water film during reverse flow, h refers to a laminar forward flow regenerated liquid with a small flow rate, i refers to a turbulent flow with a large flow rate, for example, a period of 300 seconds/5 seconds.
FIG. 4 is a schematic flow chart of an ion exchange resin scrubbing process based on an ion exchange regenerated resin bed according to an embodiment of the present application. As shown in fig. 4, the scrubbing process includes the following steps S100 and S200.
S100: in the air scrubbing step of resin scrubbing, an air inlet valve in the ion exchange regenerated resin bed is opened to charge the regenerated bed.
For example, the air inlet time when the air inlet valve is opened to charge the regeneration bed can be 2-4 min each time, and sedimentation is carried out for 5min.
S200: while executing S100, opening a grease outlet valve at preset time intervals, entering desalted water through the grease outlet valve for carrying out countercurrent flushing for preset time, lifting resin in the regeneration bed by using air and the desalted water, flushing by using air, and discharging impurities by using the desalted water.
In some embodiments, the injection rate of the desalted water is 100t/h, and the inflow rate of the air is 300m 3 /h。
According to the technical scheme provided by the embodiment of the application, through in the air scrubbing step of carrying out resin scrubbing, the operation of periodically opening the grease outlet valve to inject desalted water is increased, thereby air suspension scrubbing is carried out when the air scrubbing step is realized, not only air is used for stirring friction, but also desalted water timely brings out sundries falling off, the adsorbed bubbles and organic matters of the resin boundary water film can be efficiently removed, the situation of repeated regeneration like other power plants is reduced or avoided, the time of the resin scrubbing process is also facilitated to be shortened, the resin scrubbing efficiency is improved, and the cost reduction and the efficiency enhancement are realized.
In at least one embodiment of the present application, the predetermined time interval is in the range of 250 seconds to 350 seconds, and the predetermined duration is in the range of 3 seconds to 10 seconds.
For example, the preset time interval is 300 seconds, and the preset time period is 3 seconds, so that a laminar forward flow of 300 seconds and a turbulent backward flow of 5 seconds can be realized.
Fig. 5 is a schematic flow chart of an ion exchange resin scrubbing process based on an ion exchange regenerated resin bed according to another embodiment of the present application. The embodiment shown in fig. 5 is a modification of the embodiment shown in fig. 4. As shown in fig. 5, the scrubbing process further includes step S101 before step S100, and steps S300 and S400 after step S200, which are different from the embodiment shown in fig. 4.
S101: when the resin is scrubbed, the liquid level is firstly reduced to a position 10 cm-15 cm away from the upper part of the resin, and then the compressed air valve and the top air vent valve are slowly opened for backwashing and scrubbing.
S300: repeating scrubbing and sedimentation operations for a preset number of times.
For example, the preset number of times is less than 10 times, such as 5 times.
S400: performing backwashing operation, and if the water is clear, performing scrubbing-sedimentation-backwashing operation again; and if the water discharged from the last step still contains more impurities, repeating S101-S400.
According to the technical scheme provided by the embodiment of the application, the step S101 is executed before the air scrubbing step, so that the damage to the resin caused by the too high air flow rate can be prevented. Because the steps S100 and S200 are adopted in the embodiment of the present application, the number of repeated scrubbing and sedimentation operations can be reduced in the step S300, so that the resin scrubbing time is shortened, and the resin scrubbing efficiency is improved.
Fig. 6 is a schematic flow chart of an ion exchange resin regeneration process based on an ion exchange resin regeneration bed according to an embodiment of the present application. As shown in fig. 6, the regeneration process includes at least one of the following steps S4, S5, and S12.
S4: in the acid-base feeding step of resin regeneration, an acid-base feeding valve in an ion exchange regenerated resin bed is opened, the acid-base concentration of the solution in the bed body of the regenerated bed is regulated to be within a preset acid-base concentration range, and simultaneously a fat outlet valve is opened at preset time intervals, and the fat outlet valve is used for feeding desalted water for countercurrent flushing for preset time.
For example, in the acid-base step, the acid-base valve 10 is opened to adjust the acid concentration of the solution in the bed body of the regeneration bed 1. For example, in some embodiments, in the acid-base step, acid is fed at a rate of 20t/h, the bottom lipid outlet valve 2 is opened every 300 seconds, and desalted water is fed at a rate of 100t/h, 300m 3 And (3) carrying out pressure air in the process of/h, wherein the opening time is 5 seconds, the resin is lifted by high-flow desalted water and air, the resin rolls over, and the boundary water film changes. Ion impurities accumulated in the boundary water film are quickly carried out of the bed.
For example, the predetermined acid-base concentration range may be 3% to 6%.
S5: in the replacement step of resin regeneration, the acid-base inlet valve is closed, the fat outlet valve is opened at preset time intervals, and the desalted water is fed through the fat outlet valve for countercurrent flushing for preset time.
Specifically, in the replacement step, the acid-base inlet valve 10 is closed and replaced with demineralized water. The valve action is consistent with acid feeding. For example, in some embodiments, the demineralized water is displaced by 20t/h, the lipid outlet valve is opened every 300 seconds, 100t/h of demineralized water is entered, 300m 3 And/h process pressure.
S12: in the second rapid flushing step of resin regeneration, a water inlet valve and a bottom discharge valve are opened, other valves are closed, rapid flushing is performed, a fat outlet valve is opened at preset time intervals, reverse flushing is performed for preset time period by entering desalted water through the fat outlet valve, and the regeneration process is automatically finished after the conductivity is qualified.
Specifically, in the second rapid flushing step, the water inlet valve 7 and the bottom discharge valve 3 are opened to perform rapid flushing, and the regeneration process is automatically ended after the electric conduction is qualified. For example, in some embodiments, 65t/h of desalted water, the lipid outlet valve is opened every 300 seconds, 100t/h of desalted water is entered, 300m 3 And/h process pressure.
It should be noted that, the preset time interval and the preset time length may be set according to actual requirements, and specific numerical values of the preset time interval and the preset time length are not limited in the embodiment of the present application. For example, in some embodiments, the preset time interval ranges from 250 seconds to 350 seconds, the preset duration ranges from 3 seconds to 10 seconds, further, for example, the preset time interval may be 300 seconds, and the preset duration may be 5 seconds.
According to the technical scheme provided by the embodiment of the application, when any one or more steps of acid-base feeding step, replacement step and secondary rapid flushing step of resin regeneration are carried out, the periodical opening of the lipid outlet valve is additionally arranged for carrying out demineralized water countercurrent flushing, the regenerated liquid is regenerated in a concurrent flow mode, the resin is lifted and turned over by high-flow demineralized water and air, and the exchanged impurity ions are rapidly brought out of the regenerated bed body through changing the boundary water film of the resin, so that impurities generated in the resin exchange process are easier to peel off, the time of a resin regeneration process is also facilitated to be shortened, the resin regeneration quality is improved, and cost reduction and efficiency enhancement are realized. In addition, the regeneration process provided by the embodiment of the application can realize forward flow-reverse flow back and forth switching when the resin is regenerated by adding the control step, resin treatment flushing can be realized in a plurality of steps, the resin is in a suspended state, the pot is similar to the pot of a cook frying, impurity ion groups adsorbed and wound in a resin boundary water film are enabled to be turned over, broken functional groups, tiny bubbles, organic matters and the like are enabled to be brought out of a regeneration bed in time, the resin regeneration is enabled to be more efficient and higher in quality, the regeneration cost is reduced, the electricity consumption water can be saved, the economic benefit is improved, and certain economical efficiency is achieved.
Fig. 7 is a schematic flow chart of an ion exchange resin regeneration process based on an ion exchange resin regeneration bed according to another embodiment of the present application. The embodiment shown in fig. 7 is a modification of the embodiment shown in fig. 6. As shown in fig. 7, the regeneration process further includes the following steps before S4, which is different from the embodiment shown in fig. 6.
S1: in the acid-base charging step of the acid-base tank for resin regeneration, acid-base charging is carried out on the acid-base metering tank.
For example, if the acid-charging step is performed, the acid-base batch tank may be an acid batch tank, and the sulfuric acid is injected into the acid batch tank to a predetermined liquid level range.
The acid-base amount charged into the acid-base metering box 11 is larger than the acid-base amount actually required, for example, the acid-base amount charged into the acid-base metering box 11 is 150% of the acid-base amount actually required, so as to ensure the regeneration allowance of 150%.
In some embodiments, time protection can be provided in the acid-base tank acid-base charging step, so that sulfuric acid overflow caused by blockage of the liquid level meter is avoided.
S2: in the water filling step of the regenerated bed for resin regeneration, a water inlet valve and an exhaust valve are opened to fill water for the bed body of the regenerated bed, and when the tuning fork switch behind the exhaust valve detects that the water flow is finished, the next step is automatically carried out.
Specifically, the water inlet valve 5 and the exhaust valve 7 are opened to fill the bed body of the regeneration bed 1, and when the tuning fork switch behind the exhaust valve 7 detects that the water flow is finished, the next step is automatically carried out.
S3: in the pre-injection step of resin regeneration, a regeneration liquid valve and a bottom discharge valve are opened, and a water inlet valve and a water outlet valve are closed to establish a regeneration liquid flow.
Specifically, in the preliminary injection step, the regeneration liquid valve 6 and the bottom discharge valve 3 are opened, and the water inlet valve 5 and the air outlet valve 7 are closed, establishing the flow rate of the regeneration liquid.
In the regeneration process provided in at least one embodiment of the present application, after S5 and before S12, the regeneration process further includes the following steps S6 to S11.
S6: in the first rapid flushing step of resin regeneration, the regeneration bed is rapidly flushed, the water inlet valve and bottom discharge valve are opened, and the other valves are closed to flush the resin and flush the residual acid-base in the regeneration bed.
Specifically, in the first quick flush sequence, quick flush 1, inlet valve 7 and bottom drain valve 3 are opened and the other valves are closed. Thus, the resin can be washed by large-flow water, and the residual acid or alkali in the bed body can be washed.
For example, in some embodiments, water may be injected at a rate of 65 t/h.
S7: in the regeneration bed water filling step of resin regeneration, a water inlet valve and an exhaust valve are opened to fill the regeneration bed with water.
Specifically, in the water refilling step of the regeneration bed, the water inlet valve 5 and the air outlet valve 7 are opened to fill the bed body of the regeneration bed 1, and when the tuning fork switch behind the air outlet valve 7 detects water flow, the next step is automatically carried out.
S8: in the top pressure drainage step of resin regeneration, an air inlet valve and a middle drainage valve are opened, the top pressure drainage is fast carried out, and the liquid level is controlled at the middle drainage position.
Specifically, in the top-pressure drainage step, the air inlet valve 4 and the middle drainage valve 5 are opened, the top-pressure drainage is fast performed, and the liquid level is controlled at the middle drainage position. For example, in some embodiments, the mid-row position may be a position 10cm above the resin layer. The time to enter the air may be 40 seconds.
S9: in the air scrubbing step of resin regeneration, an air inlet valve and an air outlet valve are opened, and resin regeneration is performed and then scrubbing is performed.
Specifically, in the air scrubbing step, the intake valve 4 and the exhaust valve 9 are opened, and resin regeneration is performed and then scrubbing is performed. For example, in some embodiments, a Roots blower may be used to provide the air source during the air scrubbing step.
S10: in the back washing middle discharging step of resin regeneration, a fat inlet valve and a middle discharging valve are opened to carry out back washing middle discharging.
Specifically, the fat inlet valve 2 and the middle drain valve 5 are opened in the middle drain step of backwashing, and the middle drain of backwashing is performed.
S11: in the forward washing reverse discharging step of resin regeneration, a water inlet valve, a middle discharging valve and a bottom discharging valve are opened to perform forward washing middle discharging.
Specifically, in the forward-washing reverse-draining step, the water inlet valve 7, the middle-draining valve 5, and the bottom-draining valve 3 are opened, and the forward-washing middle-draining bottom-draining is performed. For example, the counter-current forward switching may be performed 3 times.
According to the technical scheme provided by the embodiment of the application, by adopting at least one of the steps S4, S5 and S12, the acid and alkali consumption in the step S1 can be reduced, the generation of wastewater is reduced, and the resin regeneration can efficiently remove bubbles and organic matters adsorbed by the resin boundary water film.
Experiments prove that by adopting the technical scheme provided by the embodiment of the application, the water production period is greatly improved by the air suspension regenerated resin, and the regeneration index is superior to that of other regeneration methods, for example, the water production period is improved from 20-30 ten thousand tons to 300-500 ten thousand tons, the electric conductivity is less than 0.06, the sodium is less than 0.1ppb, and the silicon is less than 2ppb.
It should be noted that, the combination of the technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all the technical features described in the present application may be freely combined or combined in any manner unless contradiction occurs between them.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An ion exchange regenerated resin bed is characterized by comprising a regenerated bed, a fat outlet valve, a bottom discharge valve, an air inlet valve, a water inlet valve, a fat inlet valve, an air outlet valve, a middle discharge valve, a regenerated liquid valve, an acid-base inlet valve and an acid-base metering box which are positioned at the bottom of the regenerated bed, wherein the water inlet valve, the fat inlet valve, the air outlet valve, the middle discharge valve, the regenerated liquid valve, the acid-base inlet valve and the acid-base metering box are positioned at the top of the regenerated bed,
the fat outlet valve is positioned on a first bottom pipeline at the bottom of the regeneration bed, the air inlet valve is positioned on a branch pipeline between one end of the first bottom pipeline connected with the regeneration bed and the fat outlet valve, and the bottom discharge valve is positioned on a second bottom pipeline at the bottom of the regeneration bed;
discharging the resin while the fat outlet valve is open, and simultaneously injecting desalinated water to lift the resin with the desalinated water and air in an air scrubbing step of a scrubbing process of the ion exchange resin, and/or in any one or more of an acid-base step, a displacement step, and a second rapid flushing step of a regeneration process of the ion exchange resin.
2. The ion exchange resin bed of claim 1, wherein the ion exchange resin bed comprises,
the middle exhaust valve is positioned on one branch pipeline of the side pipeline at the side of the regeneration bed, and is positioned on the other branch pipeline of the side pipeline at the side of the regeneration bed in sequence from one end close to the side pipeline and connected with the regeneration bed, and the regeneration liquid valve, the acid-base inlet valve and the acid-base metering box are positioned on the other branch pipeline of the side pipeline at the side of the regeneration bed.
3. The ion exchange resin bed of claim 1, wherein the ion exchange resin bed comprises,
the inlet valve is positioned on a first top pipeline at the top of the regeneration bed, and the fat inlet valve and the exhaust valve are respectively positioned on two branch pipelines of a second top pipeline at the top of the regeneration bed.
4. A process for scrubbing ion exchange resin based on the ion exchange regenerated resin bed according to any one of claims 1 to 3, comprising:
in the air scrubbing step of resin scrubbing, an air inlet valve in the ion exchange regenerated resin bed is opened to charge the regenerated bed;
simultaneously, open the play fat valve with predetermineeing the time interval, get into the demineralized water through play fat valve and carry out countercurrent flushing and predetermineeing duration, utilize air and demineralized water to lift the resin in the regeneration bed to wash with the air, utilize the demineralized water to discharge debris simultaneously.
5. The scrubbing process of claim 4, wherein the cleaning solution is a mixture of,
the preset time interval ranges from 250 seconds to 350 seconds, and the preset duration ranges from 3 seconds to 10 seconds.
6. A process for regenerating an ion exchange resin based on the ion exchange regenerated resin bed according to any one of claims 1 to 3, comprising:
in the acid-base feeding step of resin regeneration, an acid-base feeding valve in the ion exchange regenerated resin bed is opened, the acid-base concentration of the solution in the bed body of the regenerated bed is regulated to be within a preset acid-base concentration range, a fat outlet valve is opened at preset time intervals, and the fat outlet valve is used for feeding desalted water for countercurrent flushing for preset time;
in the replacement step of resin regeneration, an acid-base inlet valve is closed, and simultaneously, the fat outlet valve is opened at preset time intervals, and the desalted water is fed through the fat outlet valve to carry out countercurrent flushing for preset time; and/or
In the second rapid flushing step of resin regeneration, a water inlet valve and a bottom discharge valve are opened, other valves are closed for rapid flushing, meanwhile, the fat outlet valve is opened at preset time intervals, the fat outlet valve is used for entering desalted water for countercurrent flushing for preset time, and the regeneration process is automatically ended after the conductivity is qualified.
7. The regeneration process of claim 6, further comprising, prior to the acid-base advancing step of regenerating the resin:
in the acid-base charging step of the acid-base tank for resin regeneration, charging acid and base into the acid-base metering tank;
in the water filling step of the regenerated bed for resin regeneration, the water inlet valve and the exhaust valve are opened to fill water for the bed body of the regenerated bed, and when the tuning fork switch behind the exhaust valve detects that the water flow is finished, the next step is automatically carried out;
in the pre-injection step of resin regeneration, a regeneration liquid valve and a bottom discharge valve are opened, and the inlet valve and the discharge valve are closed, so that the regeneration liquid flow is established.
8. The regeneration process of claim 6, further comprising, after the displacement step of regenerating the resin, before the second rapid rinse step of regenerating the resin:
in the first rapid flushing step of resin regeneration, rapidly flushing the regeneration bed, opening the water inlet valve and the bottom discharge valve, and closing other valves to flush resin and flush residual acid and alkali in the regeneration bed;
in the step of refilling the regenerated bed for resin regeneration, opening the water inlet valve and the exhaust valve to fill the regenerated bed with water;
in the top pressure drainage step of resin regeneration, an air inlet valve and a middle drainage valve are opened, the top pressure drainage is fast carried out, and the liquid level is controlled at a middle drainage position;
in the air scrubbing step of resin regeneration, the air inlet valve and the air outlet valve are opened, and resin regeneration is performed and then scrubbing is performed;
in the back washing middle discharging step of resin regeneration, opening a fat inlet valve and the middle discharging valve to perform back washing middle discharging;
and in the forward washing reverse discharging step of resin regeneration, opening the water inlet valve, the middle discharging valve and the bottom discharging valve to perform forward washing middle discharging bottom.
9. The regeneration process according to claim 8, wherein,
the injection rate of the desalted water is 100t/h, and the inflow rate of the air is 300m 3 /h。
10. The process for air-suspended scrubbing regeneration of an ion exchange resin according to any one of claims 6 to 9,
the preset time interval ranges from 250 seconds to 350 seconds, and the preset duration ranges from 3 seconds to 10 seconds.
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