CN2455356Y - Ion exchanger for highly packed mixing bed - Google Patents
Ion exchanger for highly packed mixing bed Download PDFInfo
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- CN2455356Y CN2455356Y CN99247156U CN99247156U CN2455356Y CN 2455356 Y CN2455356 Y CN 2455356Y CN 99247156 U CN99247156 U CN 99247156U CN 99247156 U CN99247156 U CN 99247156U CN 2455356 Y CN2455356 Y CN 2455356Y
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- resin
- ion exchanger
- water
- mixed
- acid
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Abstract
The utility model relates to an ion exchanger for highly packed mixing beds. Only a distributing water device and a drainage device are arranged in the ion exchanger for mixing beds, Yin and Yang resin are uniformly mixed to be filled up the inner part of the exchanger, and only the expansion space of resin transformation is retained. The utility model is provided with high resin packing degree, the vivo regeneration does not need to make the mixed Yin and Yang resin carried out with laminating and remixing, and then the regenerative process of acidification and alkalify of the resin is completed. The utility model overcomes the defects of many external regenerative facilities of the existing ion exchanger for mixing beds, complicated internal structure of a vivo regenerator, low space availability ratio, cockamamie regenerative process, etc. The utility model can be used for water desalting and water softening, and particularly be used for the treatment of water with high content of permanent hardness.
Description
The utility model relates to main equipment mixed-bed ion exchanger and the renovation process thereof in the ion-exchange water treatment technology.
Well-known mixed-bed ion exchanger is the common equipment in the ion-exchange water treatment technology, has the effluent quality height, the superiority of water stabilization, but because storng-acid cation exchange resin and two kinds of resins of strong-base anion-exchange resin are with being loaded in the interchanger, the complicated operation that its regenerative process is become, increase special-purpose actifier column and resin during external regeneration and stored post, interchanger internal structure complexity during internal regeneration, member is many, the inner space utilization rate of interchanger is low, regenerative process is loaded down with trivial details, the acid-base consumption height, time is long, shortcomings such as resin loss is big are mainly used in the few user's of the advanced treating of water and demineralized water consumption pure water preparation owing to above many reason mixed-bed ion exchangers.
The utility model is a kind of novel mixed-bed ion exchanger, and a kind of new renovation process is provided, it is many to have overcome existing mixed-bed ion exchanger external regeneration equipment, internal regeneration interchanger internal structure complexity, shortcomings such as space availability ratio is low, and regenerative process is loaded down with trivial details.Has the high resin compactedness.During internal regeneration, need not carry out layering and mixing once again to the yin and yang resin that mixes, the acid that adds that can finish resin adds the alkali regenerative process.And internal structure is simple, does not have middle part drainage arrangement and regeneration cloth alkali device.For realizing the utility model function, adopt following scheme.
1. the structure of mixed-bed ion exchanger such as Fig. 1.
Fig. 1 be high packing density mixed-bed ion exchanger structural representation wherein: 1-upper connecting tube mouth flange; The last water-distributing device of 2-; The 3-hand-hole;
The 4-anion-cation exchange resin; Drainage arrangement under the 5-;
6-lower linking tube flange; Unload mouth under the 7-resin; 8-resin anti-wash tank meets .
The 9-dished (torispherical) head; The 10-cylindrical shell
2. used resin is weak-acid cation-exchange resin and weak-base anion-exchange resin.
3. regenerative process is: go up acid → displacement 1 → upward alkali → displacement 2 → cleaning.
Whole water making process is:
Move → stop → going up acid → displacement 1 → upward alkali → displacement 2 → cleaning.Adopt the theoretical foundation of this programme: system water process:
Weak acid resin has faintly acid because cation exchange groups is R-COOH, can only work with carbonate hardness in handling in institute, removes firmly temporary in anhydrating, and its chemical reaction is:
The HCl, the H that generate
2SO
4Be strong acid, the H that ionization goes out
+The H that has suppressed R-COOH
+Disassociation, the cause that above-mentioned reaction can not be gone on will make reaction go on, and can correspondingly reduce or eliminate HCl, the H of generation
2SO
4, be beneficial to above-mentioned each reaction and move right, realize utilizing faintly acid sun resin to remove hard forever.Realize above-mentioned purpose, can in faintly acid sun resin, sneak into weakly basic anion resin, allow strong acid root CI in weakly base resin and the water
-, SO
4 2-, NO
3 -Reaction is also emitted OH
-To neutralize weak-acid cation-exchange resin and Ca
2+Mg
2+The H that reaction is emitted
+, the entire reaction balance is moved right, thus realize with faintly acid sun resin remove anhydrate in hard forever purpose, this kind method has not only been removed the calcium ions and magnesium ions in the water, the while is also corresponding has removed the various strong acid roots in the water, as CI
-, SO
4 2-, NO
3 -Deng.Has partially desalted ability.Regenerative process:
Behind the mixed-bed ion exchanger operation certain hour, H type cationic ion-exchange resin will progressively be converted into calcium type and magnesium type resin, OH type anion exchange resin will progressively be converted into chlorine type and sulfuric acid type resin, mixed-bed ion exchanger will lose gradually to the water correction ability, need regenerate to mixed-bed ion exchanger.Need carry out the waterpower layering to yin and yang resin when having mixed-bed ion exchanger owing to the resin regeneration of employing strong acid and strong base now, sizable backwash space is all left on interchanger inner resin layer top, is used for the backwash layering of yin and yang resin.Then yin and yang resin is regenerated with alkali and acid respectively, behind the regeneration ending, the yin and yang resin to layering carries out the air mixing again.And the mixed bed ion exchanger of employing weak acid and weak base not only can adopt the conventional renovation process regeneration that mixes bed to be somebody's turn to do and mix bed, but also resin is not stratified, carries out the acid-alkali regeneration that this mixes bed with the method for fixed bed co-current regeneration and counter-current regeneration.
Because weak acid resin has H
+Strong affinity is greater than the characteristic of other metal cations, and weak base resin has OH
+Strong affinity greater than the characteristic of other acidic anionics.Simultaneously because slow this characteristic of speed of R-COOH type resin and strong alkaline substance reaction.
As:
The used time is 7 days when reaching 90% balance, and
Used timetable is the 1-3 branch when reaching 90% balance.
The characteristic of comprehensive above weak acid and weak base resin at first adds acid to the mixed-bed ion exchanger that lost efficacy, its faintly acid sun resin of regenerating, and this is because if the resin that lost efficacy is gone up alkali earlier, and following reaction takes place:
The Mg (OH) that generates
2Extremely hard to tolerate in water (saturated concentration 25 ℃ the time in water is 64mg/L), and easily form colloid and can block the resins exchange duct and cause resin stain, therefore adopt to add acid earlier and faintly acid sun resin is regenerated the following reaction of last acid generation: (is example with HCI)
Can finish the positive regeneration of resin of the faintly acid that lost efficacy in the mixed-bed ion exchanger by last acid.
Also available H
2SO
4Regeneration, but because weak-acid cation-exchange resin when losing efficacy, be converted into the large percentage of calcium type, the CaSO that generates when big with regeneration of sulfuric acid concentration
4Easily separate out, be deposited in the mesh of resin particle or the surface of resin particle, cause the calcium contamination of resin, concentration is unsuitable too high during therefore with regeneration of sulfuric acid, can control low concentration 0.5-1.0%.
The mixed-bed ion exchanger that last acid regeneration is crossed adds alkali regeneration again, and following 3 reactions will take place:
In superincumbent three reactions, (1) (2) two reactions reach equilibration time extremely lacked about 1-3 minute, and reaction carries out more thoroughly, was about very much 7 days and react to take time when (3) will reach 90% balance.Chemical reaction when therefore going up alkali mainly is (1) (2).Though the reaction of reaction (3) is slower, this reaction exists after all, when its product R-COONa moves will with the Ca in the water
2+Mg
2+Following reaction takes place:
R-COONa can remove the hardness in anhydrating, this hard effect of removing of mixing bed is had no effect, but the existence of being somebody's turn to do reaction will consume a certain amount of NaOH, the alkali number of regeneration negative resin is reduced to some extent, therefore regenerating should suitably improve when adding alkali adds the alkali total amount, to guarantee the regeneration effect of negative resin.
Can finish by last alkali the weakly basic anion resin that lost efficacy in the mixed-bed ion exchanger is finished regeneration, but after preventing to add acid, directly add alkali, the spent acid of alkali and pipeline and interchanger reacts, reduce the utilization rate of soda acid, therefore adding acid and adding alkali adds certain hour between two steps water, the spent acid of displacement acid regeneration process, so reproducer should be following steps:
Last acid → displacement 1 → upward alkali → displacement 2 → cleaning
Clean and to put into operation after qualified.Save the backwash layering in the former mixed bed internal regeneration technology, mixed the preceding draining of fat, processes such as the mixing of air once again of layering resin and exhaust.This mixed-bed ion exchanger mixes bed with existing internal regeneration and compares, middle part drainage arrangement and regeneration cloth alkali device have been saved, need not the backwash layering during simultaneously owing to regeneration, also just need not to leave the backwash expansion space of resin in the interchanger, therefore resin can be filled interchanger as far as possible, only stay expansion space transition of resin to get final product, the interior space availability ratio of interchanger is improved greatly.Below further specify the present invention by example
Total hardness content is that 295mg/L is (with CaCO in the known former water
3Meter), temporary hardness is 185mg/L (CaCO
3Meter), permanent hardness is that 110mg/L is (with CaCO
3Meter), HCO in addition
3Be 225.7mg/L, CI
-Be 38.34mg/L, SO
4 2-Be 57.64mg/L, NO
3 -Be 10mg/L.The diameter of mixed bed interchanger is 2200mm, and resin loadings total amount is 15m
3(wherein negative resin is D301 6.5m
3, positive resin is D113 8.5m
3) to load height overall be that 3.94m, the total useful space of interchanger are 4.4m to mixed with resin.The resin compactedness is 89.5%.
The system water process of this mixed bed is divided following a few step operation
Program time (branch) parameter flow (ton/time)
Operation 120
Stop
Last acid 60 0.80% (H
2SO
4) 108
Replace 1 10 108
Last alkali 40 1.0% (NaOH) 42
Replace 2 40 42
Clean 20 108
Clean the step and detect effluent quality, can put into operation after qualified.
Water outlet hardness curve such as Fig. 2 when its cleaning and operation
Wherein: t0-puts into operation constantly; T1-goes out the moment (promptly mixing bed stops transport constantly) of the water hardness 〉=controlling value
Y2-hardness controlling value
The operation monitoring index that should mix bed mainly is a hardness.
Now move on to the control index of fortune for going out the water hardness≤2mg/L (with CaCO with cleaning
3Meter);
The control index that the operation commentaries on classics stops is for going out the water hardness 〉=2mg/L (with CaCO
3Meter).
Mix bed with above-mentioned regeneration regeneration, the aquifer yield statistics in each cycle of back of putting into operation is as table 1.Table 1:
| The cycle of operation | Running time (hour) | Aquifer yield (ton) | |
| 1 | 42.4 | 3204 | |
| 2 | 37.5 | 3187 | |
| 3 | 39.2 | 3156 | |
| 4 | 37.3 | 3145 | |
| 5 | 35.6 | 3168 | |
| 6 | 36.4 | 3198 | |
| 7 | 41.5 | 3211 | |
| 8 | 34.8 | 2987 | |
| 9 | 45.5 | 3223 | |
| 10 | 32.2 | 3088 | |
| 11 | 34.3 | 3134 | |
| 12 | 33.2 | 3126 | |
| 13 | 32.8 | 3153 | |
| 14 | 43.5 | 2845 | Wherein stopped transport 9.3 hours |
| 15 | 30.6 | 3178 | |
| 20 | 32.7 | 3176 | |
| 25 | 27.8 | 3065 | |
| 30 | 33.6 | 3127 | |
| Average aquifer yield | 3131.6 | ||
From top cycle aquifer yield statistical form as can be seen, operation and regeneration through a plurality of cycles, the stable effluent quality of this mixed-bed ion exchanger under above-mentioned raw water quality and renovation process, operation is normal, and it moves out of hardness of water can be (with CaCO below 1.5mg/L
3Meter), CI
-Can be at 20mg/L, SO
4 2-Can be at 10mg/L, basicity decreases, and not only can reach the hardness number of the water outlet of Na ion-exchanger.This mixed-bed ion exchanger is not only softening but direct hard-off hard water, and remove a certain amount of strong acid root, total salinity is reduced greatly, have partially desalted ability, its effluent quality is softening all better than Na sodium ion demineralizer or H-Na tandem, and device fabrication is simple, regeneration is convenient, simultaneously owing to having adopted weak type ion exchange resin, than sodium ion regenerating softener agent utilization rate height, the operating capacity of resin itself is also big, easily regeneration.Be a kind of good water treatment facilities, can be used for water correction and partially desalted.
Claims (1)
1. novel mixed-bed ion exchanger, this mixed-bed ion exchanger is high compactedness mixed-bed ion exchanger,
It is characterized in that: housing is a cylindrical tube, and two ends are dished (torispherical) head, and the fluid turnover mouth of pipe is left at end socket center, two ends, and internals has only water-distributing device and drainage arrangement, cloth acid device and cloth alkali device when its water-distributing device is regeneration simultaneously; This mixed-bed ion exchanger institute spent ion exchange resin is weak-acid cation-exchange resin and weak-base anion-exchange resin, and yin and yang resin evenly mixes to be filled in the interchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99247156U CN2455356Y (en) | 1999-11-18 | 1999-11-18 | Ion exchanger for highly packed mixing bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99247156U CN2455356Y (en) | 1999-11-18 | 1999-11-18 | Ion exchanger for highly packed mixing bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2455356Y true CN2455356Y (en) | 2001-10-24 |
Family
ID=34032648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99247156U Expired - Fee Related CN2455356Y (en) | 1999-11-18 | 1999-11-18 | Ion exchanger for highly packed mixing bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2455356Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107001410A (en) * | 2014-12-08 | 2017-08-01 | Emd密理博公司 | Mixed bed ion-exchange adsorbent |
| CN114307364A (en) * | 2021-12-31 | 2022-04-12 | 张家港美景荣化学工业有限公司 | Purification method of electronic grade polyhydric alcohol |
| US11305271B2 (en) | 2010-07-30 | 2022-04-19 | Emd Millipore Corporation | Chromatography media and method |
-
1999
- 1999-11-18 CN CN99247156U patent/CN2455356Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11305271B2 (en) | 2010-07-30 | 2022-04-19 | Emd Millipore Corporation | Chromatography media and method |
| CN107001410A (en) * | 2014-12-08 | 2017-08-01 | Emd密理博公司 | Mixed bed ion-exchange adsorbent |
| US11236125B2 (en) | 2014-12-08 | 2022-02-01 | Emd Millipore Corporation | Mixed bed ion exchange adsorber |
| CN114307364A (en) * | 2021-12-31 | 2022-04-12 | 张家港美景荣化学工业有限公司 | Purification method of electronic grade polyhydric alcohol |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |