CN107442185A - A kind of online recovery device of resin cation iron poisoning and method for resuscitation - Google Patents
A kind of online recovery device of resin cation iron poisoning and method for resuscitation Download PDFInfo
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- CN107442185A CN107442185A CN201710906680.7A CN201710906680A CN107442185A CN 107442185 A CN107442185 A CN 107442185A CN 201710906680 A CN201710906680 A CN 201710906680A CN 107442185 A CN107442185 A CN 107442185A
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- ion
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- exchanger
- resin
- pipe
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 44
- 231100000572 poisoning Toxicity 0.000 title claims abstract description 32
- 230000000607 poisoning effect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 239000011347 resin Substances 0.000 title claims description 71
- 229920005989 resin Polymers 0.000 title claims description 67
- 150000001768 cations Chemical class 0.000 title description 3
- 238000004140 cleaning Methods 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000011001 backwashing Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 19
- 239000003729 cation exchange resin Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 49
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 18
- 230000008929 regeneration Effects 0.000 claims description 16
- 238000011069 regeneration method Methods 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 239000003814 drug Substances 0.000 claims description 11
- 239000011780 sodium chloride Substances 0.000 claims description 11
- 229910001415 sodium ion Inorganic materials 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 11
- 125000000524 functional group Chemical group 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 239000008234 soft water Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 8
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229960004887 ferric hydroxide Drugs 0.000 claims description 4
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 5
- 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 abstract description 4
- 239000003456 ion exchange resin Substances 0.000 abstract description 4
- 229920003303 ion-exchange polymer Polymers 0.000 abstract description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 5
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- 238000005342 ion exchange Methods 0.000 description 5
- -1 iron ion Chemical class 0.000 description 5
- 229910001425 magnesium ion Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 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
- 239000007832 Na2SO4 Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009745 resin transfer moulding Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing 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
- B01J49/53—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents for cationic exchangers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The present invention relates to ion exchange resin on-line cleaning technical field, the online recovery device of specifically a kind of cationic ion-exchange resin iron poisoning and method for resuscitation, it is provided with ion-exchanger, the top of ion-exchanger is provided with water inlet pipe, the lower section of ion-exchanger is provided with outlet pipe, one end of outlet pipe is connected with ion-exchanger, the other end is connected with softened water tank, outlet pipe is provided with outlet valve, softened water tank is connected with outside water system, it is characterised by that ion-exchanger is provided with on-line cleaning mechanism and backwashing mechanism, with simple in construction, the recovery time is short, resuscitation effect is thorough, the advantages such as the wasting of resources is low.
Description
Technical field
The present invention relates to ion exchange resin on-line cleaning technical field, specifically a kind of simple in construction, recovery when
Between the online recovery device of cationic ion-exchange resin iron poisoning short, that resuscitation effect is thorough, the wasting of resources is low and method for resuscitation.
Background technology
It is well known that cationic ion-exchange resin is in station boiler demineralized water, Industrial Boiler softened water and pure water production etc.
Go in water removal to widely use in the water treatment facilities of calcium ions and magnesium ions.The device often touches iron content underground in use
Water carries iron ion because entering caused by pipeline rust in water, cause cationic ion-exchange resin to be polluted by iron ion, commonly referred to as
For iron poisoning.Although iron ion content is seldom in water, year in year out operation go down, iron ion it is more long-pending in cation exchange groups more
It is more, most of operating capacity of resin is occupied, causes resin to Ca2+、Mg2+The decline of ion-exchange capacity, water outlet water
Matter is exceeded, and the cycle of operation shortens, and aquifer yield is reduced, a series of problems, such as regenerating agent consumption increase, can be caused when serious device without
Method operation is gone down.
It is difficult by the Fe on resins exchange group with the salt regenerated liquid of conventional low concentration after resin iron poisoning3+Under displacement
Come.People employ different resin iron poisoning method for resuscitation.The visual iron poisoning degree of conventional iron poisoning method for resuscitation it is different and
It is different.Slight iron poisoning can recover in tank.When iron poisoning is deeper, recovered using outside tank.
Method in tank：It is inverse with 6 m/h flow velocitys with the 8.0%HCl solution of 3 times of resin volumes thoroughly after backwash resin bed
To flowing through resin bed.The layer is rinsed to water outlet pH >=5.5 with raw water.With the 9.0%NaCl solution of 3 times of resin volumes, with 6 m/
H flow velocitys inversely flow through resin bed.The min of resin bed 5 is rinsed with 9 m/h flow velocitys complete resin transfer moulding with softened water.It is transferred to normal
Soften exchange process.This method is applied to the recovery of slight iron poisoning resin, but effect is not ideal enough.
The outer method of tank：When resin iron poisoning is extremely serious, some units are preferably multiple in the hope of obtaining even using the outer recovery method of tank
Su Xiaoguo.Thoroughly resin is moved into dedicated cleaner after backwash resin bed.With the 8.0%HCl of 3 times of resin volumes
Solution, resin is soaked at twice, be slowly stirred 40 min, interval 2 h emptyings waste liquid is once.With the raw water of 5 times of resin volumes
Divide 3 times and embathe resin, be slowly stirred, 5 min emptyings waste water is once.With the 9.0%NaCl solution of 3 times of resin volumes, by foregoing
Method is soaked resin and cleaned.Again with 3 times of resin volume 8.0%NaOH solution, soak resin by preceding method and clean.Most
Afterwards using the 9.0%NaCl solution of 3 times of resin volumes, after soaking resin by preceding method, resin is returned and is loaded in swap tank,
And clean the min of resin 5 with softened water with 9 m/h flow velocitys.The outer recovery overall process of tank is completed, is transferred to normal softening exchange process.
Problems be present in traditional regeneration：1st, regeneration step is complicated；2nd, regenerative agent utilization rate is low, and medicament wastes tight
Weight；3rd, it is big to regenerate water consumption, not only needs largely to be used with water rate, regenerative wastewater processing is equally also required to spend very big expense
With；4th, being generally completed primary recycling needs to spend longer time, and recovery time efficiency is low.Therefore need research a kind of economical and practical
Resin regenerating device.
The content of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art, there is provided one kind is simple in construction, the recovery time is short, recovery
The online recovery device of cationic ion-exchange resin iron poisoning and method for resuscitation that effect is thorough, the wasting of resources is low.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of online recovery device of cationic ion-exchange resin iron poisoning, provided with ion-exchanger, the top of ion-exchanger is provided with
Water inlet pipe, the lower section of ion-exchanger are provided with outlet pipe, and one end of outlet pipe is connected with ion-exchanger, the other end and soft water
Case is connected, and outlet pipe is provided with outlet valve, and softened water tank is connected with outside water system, it is characterised in that described ion is handed over
Parallel operation is provided with on-line cleaning mechanism and backwashing mechanism, described on-line cleaning mechanism by molten medicine-chest, cleaning feed tube, wash out
Liquid pipe composition, described molten medicine-chest top are provided with medicine-chest water inlet, feeding opening and cleaning waste liquid import, medicine-chest water inlet and outside
Filler pipe is connected, and described cleaning waste liquid import is provided with cleaning drain pipe, and the one end and cleaning waste liquid for cleaning drain pipe are entered
Mouth is connected, and the other end is connected with the water inlet pipe on ion-exchanger, and cleaning drain pipe is provided with liquid valve, described molten medicine
Rinse liquid outlet, sewage draining exit are provided with below case, described rinse liquid outlet is provided with cleaning feed tube, cleans one end of feed tube
It is connected with rinse liquid outlet, the other end is connected with the outlet pipe on ion-exchanger, and cleaning feed tube is provided with into medicine valve
And circulating pump, described sewage draining exit are provided with blow-off pipe, blow-off pipe is provided with blowoff valve, and cleaning fluid will by the effect of circulating pump
Cleaning fluid is entered ion-exchanger and then is discharged into cleaning drain pipe by water inlet pipe finally to enter by the outlet pipe of ion-exchanger
Enter molten medicine-chest and carry out wash cycles, described backwashing mechanism is made up of backwash tube, backwashing pump and backwash drain pipe, described backwash
One end of pipe is connected with the lower end of softened water tank, and the other end is connected with the outlet pipe on ion-exchanger, and backwash tube is provided with
Backwash valve and backwashing pump, backwash drain pipe are provided with backwash liquid valve, water inlet pipe and backwash above described ion-exchanger
Drain pipe is connected, and enters in ion-exchanger the soft water in softened water tank along backwash tube by the effect of backwashing pump and carries out clearly
Wash, the cleaning of ion-exchanger is finally realized by the backwash drain pipe discharge of top.
Cleaning feed tube of the present invention is provided with filter, and filter is located at the front of circulating pump close to molten medicine-chest portion
Position, ensure that free from admixture enters circulating pump and then entered in ion-exchanger.
Cleaning feed tube of the present invention is provided with flowmeter, and flowmeter is located at the rear of circulating pump close to ion exchange
The position of device, the cleaning fluid flow that control enters in ion-exchanger, ensure cleaning performance.
A kind of method for resuscitation of the online recovery device of cationic ion-exchange resin iron poisoning, its online recovery step are as follows：
（1）Analysis detection iron poisoning degree：Take 10 mL colors to change, be tentatively judged as that the resin of iron poisoning is placed in 100
In mL beakers, 30 mL 8.0% HCl solution is added, mixes slowly 15 min, stands 0.5 h, takes supernatant to determine total iron and contains
Amount, judges resin iron poisoning degree with this；
（2）It is determined that reduction recovery method technological parameter：A. reducing agent dosage：The dosage of sodium sulfite should be with iron in measured resin
Content number determine, the theoretical amount calculated by reaction equation, consider to be multiplied by 1.2 times of regeneration specific consumption after reducing agent purity
As reducing agent uses total amount, and reductant solution concentration is advisable with 5.0%~6.0%, to prevent the generation of bulky ferric hydroxide precipitate,
Reducing solution pH value is adjusted into 5.5~6.5 with hydrochloric acid when preparing reducing solution to be allocated；
（3）On-line cleaning is carried out：The above-mentioned decoction calculated is added in molten medicine-chest, then opens into medicine valve and liquid valve, closes
Blowoff valve, backwash liquid valve, backwash valve and outlet valve are closed, then opens circulating pump, cleaning fluid will be molten by the effect of circulating pump
Cleaning fluid in medicine-chest enters ion-exchanger by the outlet pipe of ion-exchanger along cleaning feed tube and then arranged by water inlet pipe
Go out to enter cleaning drain pipe and eventually enter into molten medicine-chest progress wash cycles, waste water is discharged through blow-off pipe；
（4）Resin regeneration：Use Na2SO3After reduction, substantial amounts of Fe is generated2+, when a large amount of functional groups and Fe on resin2+
After ions binding, the softening power of resin declines, it is therefore desirable to the resin regeneration of routine is carried out with NaCl solution, by 9% NaCl
Solution is added in molten medicine-chest, then uses the flow velocity for inversely flowing through resin bed to be advisable with 10 m/h, using reverse circulation technique, is gone back
The time of contact of stoste and resin should reach 2.0 more than h, and the sodium ions content in solution is high, and functional group can discharge Fe2+
Ion and combined with sodium ion, such resin has just recovered exchange capacity, carries out the regeneration of resin；
（5）Backwash：Need to be rinsed with water after the completion of cleaning fluid cleaning, at this moment close into medicine valve, liquid valve, outlet valve and beat
Backwash valve and backwash liquid valve are opened, then opens backwashing pump, by the effect of backwashing pump by the soft water in softened water tank along backwash
Pipe, which enters in ion-exchanger, to be cleaned, and finally realizes the final clear of ion-exchanger by the backwash drain pipe discharge of top
Wash.
Flow rate of liquid on cleaning feed tube of the present invention is 8 ~ 12 m/h, ensures that cleaning is thorough.
The present invention due to use said structure and cleaning method, have it is simple in construction, the recovery time is short, resuscitation effect is thorough
The advantages such as bottom, the wasting of resources be low.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings：
As shown in drawings, the online recovery device of a kind of cationic ion-exchange resin iron poisoning, provided with ion-exchanger 1, ion exchange
The top of device 1 is provided with water inlet pipe 3, and the lower section of ion-exchanger is provided with outlet pipe 2, one end and the phase of ion-exchanger 1 of outlet pipe 2
Connection, the other end are connected with softened water tank 4, and outlet pipe 2 is provided with outlet valve 5, and softened water tank 4 is connected with outside water system,
It is characterized in that described ion-exchanger 1 is provided with on-line cleaning mechanism and backwashing mechanism, described on-line cleaning mechanism by
Molten medicine-chest 6, cleaning feed tube 7, cleaning drain pipe 8 form, the top of described molten medicine-chest 6 be provided with medicine-chest water inlet, feeding opening and
Waste liquid import is cleaned, medicine-chest water inlet is connected with outside filler pipe 20, and described cleaning waste liquid import is provided with and washes out liquid
Pipe 8, the one end for cleaning drain pipe 8 are connected with cleaning waste liquid import, and the other end is connected with the water inlet pipe 3 on ion-exchanger 1
Logical, cleaning drain pipe 8 is provided with liquid valve 9, and the described lower section of molten medicine-chest 6 is provided with rinse liquid outlet, sewage draining exit, described cleaning
Liquid outlet is provided with cleaning feed tube 7, and one end of cleaning feed tube 7 is connected with rinse liquid outlet, the other end and ion exchange
Outlet pipe 2 on device 1 is connected, and cleaning feed tube 7 is provided with into medicine valve 10 and circulating pump 11, described sewage draining exit and is provided with row
Dirty pipe 12, blow-off pipe 12 are provided with blowoff valve 13, and cleaning fluid is by the effect of circulating pump 11 by cleaning fluid by ion-exchanger 1
Outlet pipe 2, which enters ion-exchanger 1 and then is discharged into cleaning drain pipe 5 by water inlet pipe 3, to be eventually entered into molten medicine-chest 6 and is circulated
Cleaning, described backwashing mechanism are made up of backwash tube 14, backwashing pump 15 and backwash drain pipe 16, one end of described backwash tube 14
It is connected with the lower end of softened water tank 4, the other end is connected with the outlet pipe 2 on ion-exchanger 1, and backwash tube 14 is provided with backwash
Valve 17 and backwashing pump 15, backwash drain pipe 16 are provided with backwash liquid valve, the water inlet pipe 3 of the described top of ion-exchanger 1 with
Backwash drain pipe 16 is connected, and the soft water in softened water tank 4 is entered into ion along backwash tube 14 by the effect of backwashing pump 15 hands over
Cleaned in parallel operation 1, the cleaning for realizing ion-exchanger is finally discharged by the backwash drain pipe 16 of top, described cleaning is entered
Liquid pipe 7 is provided with filter 18, and filter 18 is located at the front of circulating pump 11 close to the molten position of medicine-chest 6, ensures that free from admixture enters
In circulating pump 11 and then entrance ion-exchanger 1, described cleaning feed tube 7 is provided with flowmeter 19, and flowmeter 19, which is located at, to follow
The cleaning fluid flow that the rear of ring pump 11 enters in ion-exchanger 1 close to the position of ion-exchanger 1, control, ensure cleaning
Effect, its online recovery step are as follows：（1）Analysis detection iron poisoning degree：10 mL colors are taken to change, be tentatively judged as
The resin of iron poisoning is placed in 100 mL beakers, adds 30 mL 8.0% HCl solution, mixes slowly 15 min, stands 0.5
H, take supernatant to determine total iron content, resin iron poisoning degree is judged with this；（2）It is determined that reduction recovery method technological parameter：A. also
Former agent dosage：The dosage of sodium sulfite should be determined with the number of iron content in measured resin, be calculated by reaction equation
Theoretical amount, consider that it is that reducing agent uses total amount, reductant solution concentration to be multiplied by 1.2 times of regeneration specific consumption after reducing agent purity
It is advisable with 5.0%~6.0%, to prevent the generation of bulky ferric hydroxide precipitate, when preparing reducing solution with hydrochloric acid by reducing solution pH value
5.5~6.5 are adjusted to be allocated；（3）On-line cleaning is carried out：The above-mentioned decoction calculated is added in molten medicine-chest, then opened
Enter medicine valve and liquid valve, close blowoff valve, backwash liquid valve, backwash valve and outlet valve, then open circulating pump, cleaning fluid passes through
Cleaning fluid in molten medicine-chest is entered ion exchange by the effect of circulating pump along cleaning feed tube by the outlet pipe of ion-exchanger
Then device is discharged into cleaning drain pipe by water inlet pipe and eventually enters into molten medicine-chest progress wash cycles, waste water is arranged through blow-off pipe
Go out；（4）Resin regeneration：Use Na2SO3After reduction, substantial amounts of Fe is generated2+, when a large amount of functional groups and Fe on resin2+From
After son combines, the softening power of resin declines, it is therefore desirable to the resin regeneration of routine is carried out with NaCl solution, 9% NaCl is molten
Liquid is added in molten medicine-chest, then uses the flow velocity for inversely flowing through resin bed to be advisable with 10 m/h, using reverse circulation technique, reduction
The time of contact of liquid and resin should reach 2.0 more than h, and the sodium ions content in solution is high, and functional group can discharge Fe2+From
Son and combined with sodium ion, such resin has just recovered exchange capacity, carries out the regeneration of resin；（5）Backwash：Cleaning fluid is clear
Need to be rinsed with water after the completion of washing, at this moment close into medicine valve, liquid valve, outlet valve and open backwash valve and backwash liquid valve, so
After open backwashing pump, the soft water in softened water tank entered in ion-exchanger along backwash tube by the effect of backwashing pump carry out it is clear
Wash, the final cleaning of ion-exchanger, the described liquid cleaned on feed tube are finally realized by the backwash drain pipe discharge of top
Rate of flow of fluid is 8 ~ 12 m/h, ensures that cleaning is thorough.
Backwash in the present invention is first with the softened water back flush of 3 times of cationic ion-exchange resin volumes, with 3 times
The softened water of cationic ion-exchange resin volume is positive to be rinsed, and subsequent cationic ion-exchange resin can put into production use, and make flushing thorough
Bottom.
Mechanism is implemented in the cleaning of the present invention：Na2SO3In SO32-Fe3+It is reduced into Fe2+, so as to reduce resin to Fe3+
Combination, part Fe2+It can also further be reduced agent Na2SO3In sodium ion displacement, and react generation H+And can promotes
Fe2O3Dissolving, ferric hydroxide precipitate will not be produced in resuscitation process.
Reaction equation is: 2Fe3++ Na2SO3+ H2O = 2Fe2++ Na2SO4+ 2H+
The regeneration of routine is finally carried out with NaCl solution, you can iron poisoning resin is recovered, after softened water cleaning, be transferred to
Normal softening exchange process.
Because ion exchange resin is a kind of polymer, with corresponding functional group, generally, conventional sodium from
Sub-exchange resin carries substantial amounts of sodium ion, and when the calcium ions and magnesium ions content in water is high, ion exchange resin can discharge sodium
Ion, functional group are combined with calcium ions and magnesium ions, and the calcium ions and magnesium ions content in such water reduces, and the hardness of water declines.Hard water just becomes
For soft water, this is the course of work of softened water equipment, same reason, the iron poisoning cation tree in present apparatus ion-exchanger
Fat, use Na2SO3After reduction, substantial amounts of Fe is generated2+, when a large amount of functional groups and Fe on resin2+After ions binding, resin
Softening power decline, resin can be flowed through with sodium chloride solution, now sodium ions content in solution is high, and functional group can be released
Release Fe2+Ion and combined with sodium ion, such resin has just recovered exchange capacity, realizes the regeneration of resin, the present invention due to
Using said structure and cleaning method, there is the advantages such as simple in construction, the recovery time is short, resuscitation effect is thorough, the wasting of resources is low.
Claims (5)
1. a kind of online recovery device of cationic ion-exchange resin iron poisoning, provided with ion-exchanger, sets above ion-exchanger
Have water inlet pipe, the lower section of ion-exchanger is provided with outlet pipe, and one end of outlet pipe is connected with ion-exchanger, the other end with it is soft
Water tank is connected, and outlet pipe is provided with outlet valve, and softened water tank is connected with outside water system, it is characterised in that described ion
Exchanger is provided with on-line cleaning mechanism and backwashing mechanism, and described on-line cleaning mechanism is by molten medicine-chest, cleaning feed tube, cleaning
Drain pipe forms, and is provided with medicine-chest water inlet, feeding opening and cleaning waste liquid import above described molten medicine-chest, medicine-chest water inlet with it is outer
Portion's filler pipe is connected, and described cleaning waste liquid import is provided with cleaning drain pipe, cleans one end and the cleaning waste liquid of drain pipe
Import is connected, and the other end is connected with the water inlet pipe on ion-exchanger, and cleaning drain pipe is provided with liquid valve, and described is molten
Rinse liquid outlet, sewage draining exit are provided with below medicine-chest, described rinse liquid outlet is provided with cleaning feed tube, cleans the one of feed tube
End is connected with rinse liquid outlet, and the other end is connected with the outlet pipe on ion-exchanger, and cleaning feed tube is provided with into medicine
Valve and circulating pump, described sewage draining exit are provided with blow-off pipe, and blow-off pipe is provided with blowoff valve, the effect that cleaning fluid passes through circulating pump
By cleaning fluid by ion-exchanger outlet pipe enter ion-exchanger then by water inlet pipe be discharged into cleaning drain pipe it is final
Wash cycles are carried out into molten medicine-chest, described backwashing mechanism is made up of backwash tube, backwashing pump and backwash drain pipe, and described is anti-
Wash one end of pipe with the lower end of softened water tank to be connected, the other end is connected with the outlet pipe on ion-exchanger, sets on backwash tube
Have a backwash valve and backwashing pump, backwash drain pipe is provided with backwash liquid valve, the water inlet pipe above described ion-exchanger with it is anti-
Wash out liquid pipe to be connected, the soft water in softened water tank is entered in ion-exchanger along backwash tube by the effect of backwashing pump and carried out
Cleaning, the cleaning of ion-exchanger is finally realized by the backwash drain pipe discharge of top.
2. the online recovery device of a kind of cationic ion-exchange resin iron poisoning according to claim 1, it is characterised in that described
Cleaning feed tube be provided with filter, filter is located at the front of circulating pump close to molten medicine-chest position.
3. the online recovery device of a kind of cationic ion-exchange resin iron poisoning according to claim 1, it is characterised in that described
Cleaning feed tube be provided with flowmeter, flowmeter is located at position of the rear close to ion-exchanger of circulating pump.
4. a kind of method for resuscitation of the online recovery device of cationic ion-exchange resin iron poisoning, its online recovery step are as follows：
（1）Analysis detection iron poisoning degree：Take 10 mL colors to change, be tentatively judged as that the resin of iron poisoning is placed in 100
In mL beakers, 30 mL 8.0% HCl solution is added, mixes slowly 15 min, stands 0.5 h, takes supernatant to determine total iron and contains
Amount, judges resin iron poisoning degree with this；
（2）It is determined that reduction recovery method technological parameter：A. reducing agent dosage：The dosage of sodium sulfite should be with iron in measured resin
Content number determine, the theoretical amount calculated by reaction equation, consider to be multiplied by 1.2 times of regeneration specific consumption after reducing agent purity
As reducing agent uses total amount, and reductant solution concentration is advisable with 5.0%~6.0%, to prevent the generation of bulky ferric hydroxide precipitate,
Reducing solution pH value is adjusted into 5.5~6.5 with hydrochloric acid when preparing reducing solution to be allocated；
（3）On-line cleaning is carried out：The above-mentioned decoction calculated is added in molten medicine-chest, then opens into medicine valve and liquid valve, closes
Blowoff valve, backwash liquid valve, backwash valve and outlet valve are closed, then opens circulating pump, cleaning fluid will be molten by the effect of circulating pump
Cleaning fluid in medicine-chest enters ion-exchanger by the outlet pipe of ion-exchanger along cleaning feed tube and then arranged by water inlet pipe
Go out to enter cleaning drain pipe and eventually enter into molten medicine-chest progress wash cycles, waste water is discharged through blow-off pipe；
（4）Resin regeneration：Use Na2SO3After reduction, substantial amounts of Fe is generated2+, when a large amount of functional groups and Fe on resin2+From
After son combines, the softening power of resin declines, it is therefore desirable to the resin regeneration of routine is carried out with NaCl solution, 9% NaCl is molten
Liquid is added in molten medicine-chest, then uses the flow velocity for inversely flowing through resin bed to be advisable with 10 m/h, using reverse circulation technique, reduction
The time of contact of liquid and resin should reach 2.0 more than h, and the sodium ions content in solution is high, and functional group can discharge Fe2+From
Son and combined with sodium ion, such resin has just recovered exchange capacity, carries out the regeneration of resin；
（5）Backwash：Need to be rinsed with water after the completion of cleaning fluid cleaning, at this moment close into medicine valve, liquid valve, outlet valve and beat
Backwash valve and backwash liquid valve are opened, then opens backwashing pump, by the effect of backwashing pump by the soft water in softened water tank along backwash
Pipe, which enters in ion-exchanger, to be cleaned, and finally realizes the final clear of ion-exchanger by the backwash drain pipe discharge of top
Wash.
5. a kind of online method for resuscitation of cationic ion-exchange resin iron poisoning according to claim 4, it is characterised in that described
The step of（3）Flow rate of liquid on middle cleaning feed tube is 8 ~ 12 m/h.
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| CN113058663A (en) * | 2021-04-09 | 2021-07-02 | 中核四0四有限公司 | Detoxification regeneration method of ion exchange resin for uranium adsorption |
| CN113543881A (en) * | 2018-08-29 | 2021-10-22 | Ionx解决方案有限责任公司 | System and method for regenerating and restoring the kinetic properties of a resin |
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