CN116237090A - Method for treating and regenerating negative resin for water treatment - Google Patents
Method for treating and regenerating negative resin for water treatment Download PDFInfo
- Publication number
- CN116237090A CN116237090A CN202310150602.4A CN202310150602A CN116237090A CN 116237090 A CN116237090 A CN 116237090A CN 202310150602 A CN202310150602 A CN 202310150602A CN 116237090 A CN116237090 A CN 116237090A
- Authority
- CN
- China
- Prior art keywords
- treating
- water
- regenerating
- treatment
- resin layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011347 resin Substances 0.000 title claims abstract description 128
- 229920005989 resin Polymers 0.000 title claims abstract description 128
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003513 alkali Substances 0.000 claims abstract description 60
- 150000001450 anions Chemical class 0.000 claims abstract description 54
- 238000005406 washing Methods 0.000 claims abstract description 28
- 230000007935 neutral effect Effects 0.000 claims abstract description 26
- 239000002253 acid Substances 0.000 claims abstract description 24
- 238000002791 soaking Methods 0.000 claims abstract description 24
- 238000011069 regeneration method Methods 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 230000008929 regeneration Effects 0.000 claims abstract description 13
- 238000011001 backwashing Methods 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 72
- 239000000243 solution Substances 0.000 claims description 52
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 36
- 238000010306 acid treatment Methods 0.000 claims description 19
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 239000002585 base Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 9
- 239000002351 wastewater Substances 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 14
- 239000012535 impurity Substances 0.000 description 14
- 238000007599 discharging Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 239000012498 ultrapure water Substances 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 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 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000005349 anion exchange Methods 0.000 description 1
- 239000003957 anion exchange resin Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
-
- 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
-
- 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
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
Landscapes
- 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 invention relates to the technical field of resin for water treatment, and discloses a method for treating and regenerating a novel anion resin for water treatment, which comprises the following steps: (1) washing: carrying out large backwashing on water injection of the negative resin layer, and slowly increasing the water injection speed; (2) pretreatment: soaking the negative resin layer in acid liquor and alkali liquor respectively for 4-8 hours for a single time, and regulating the pH value to be neutral; (3) regeneration: the method for treating and regenerating the new anion resin for water treatment greatly improves the treatment effect and the improvement of the running exchange performance of the new resin, reduces the regeneration period, reduces the acid-base consumption, reduces the acid-base wastewater discharge and the wastewater treatment cost, achieves the aims of energy conservation and consumption reduction, and has remarkable effect.
Description
Technical Field
The invention relates to the technical field of resins for water treatment, in particular to a method for treating and regenerating a negative resin for water treatment.
Background
The ion exchange resin is used for removing various anions and cations in water, and has the advantages of good chemical stability, high mechanical strength, large exchange capacity and the like, and the demand in the field of water treatment is large, which accounts for about 90% of the yield of the ion exchange resin. Further, the anion resin is an anion exchange resin with basic groups such as primary amino groups, secondary amino groups, tertiary amino groups, quaternary amino groups and the like on a styrene-divinylbenzene copolymer matrix, and is commonly used for preparing pure water and high-purity water, treating wastewater and the like. In the water treatment process, the positive groups of the anion resin can be combined with the adsorption of the equicharge molar quantity of anions in the solution and release the anions of the anion resin, so that the anion exchange effect is achieved, and when the anions of the anion resin are mostly or completely exchanged, the anions of the anion resin can be regenerated through an alkaline reagent to restore the exchange capacity.
However, the new anion resin often contains impurities such as excessive raw materials and incompletely reacted oligomers, and also contains inorganic impurities such as iron, lead, copper, and the like. The impurities in the new negative resin can be gradually dissolved and released in the use process, so that the quality of the effluent water is deteriorated, the cleaning water quantity is obviously increased, the service life of the resin is seriously reduced, the resin is frequently replaced, and the replaced scrapped resin can generate the problem of solid pollution which is difficult to treat.
Disclosure of Invention
In view of this, the invention provides a method for treating and regenerating a water treatment anion resin, which solves the problems that impurities contained in a new anion resin seriously reduce the water treatment effect, reduce the quality of effluent water, reduce the service life of the resin, increase the use cost and cause environmental pollution.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for treating and regenerating a water treatment anion resin comprises the following steps:
(1) Washing: carrying out large backwashing on water injection of the negative resin layer, and slowly increasing the water injection speed;
(2) Pretreatment: soaking the negative resin layer in acid liquor and alkali liquor respectively for 4-8 hours for a single time, and regulating the pH value to be neutral;
(3) Regeneration: and (3) introducing regenerated alkali liquor into the negative resin layer.
In one embodiment, the step (1) is preceded by water injection leak detection.
It should be noted that before the large backwashing, firstly, water injection leak detection is carried out on the negative bed system, and inspection treatment is carried out on positions such as a manhole and the like to ensure that the whole negative bed system is free from leakage; the large backwash is used to thoroughly remove mechanical impurities, finely divided resin powder and water-soluble substances mixed in the anion resin layer and to ensure a resin spread rate of 50-70% using intermediate tank water.
In one embodiment, the water injection rate is slowly increased to 2m/h.
It should be noted that the water injection rate was increased to 2m/h in a gradient of 0.4-1m/h increase, with the purpose of preventing the resin in the negative resin layer from swelling and breaking due to too fast water absorption caused by too large water flow in the negative resin layer at the time of the first large backwash.
In one embodiment, the acid solution is a 5-10% hydrochloric acid solution; the alkali liquor is 2-6% sodium hydroxide solution; the dosage of the acid liquor and the alkali liquor is 2-3 times of the volume of the negative resin layer; the operation of adjusting the pH is to rinse the negative resin layer with clear water and detect the pH of the clear water after rinsing.
It should be noted that the acid solution is used to remove the soluble cationic impurities in the anion resin layer, and the alkali solution is used to remove the soluble anionic impurities in the anion resin layer.
In one embodiment, the regeneration step further comprises, prior to:
acid treatment: introducing 3-8% hydrochloric acid solution into the negative resin layer, and soaking for 12-18h after the introduction of the hydrochloric acid solution is finished;
alkali treatment: and 3-8% sodium hydroxide solution is used for introducing the negative resin layer, and soaking is carried out for 12-18h after the introduction of the sodium hydroxide solution is finished.
In one embodiment, the acid treatment and the alkali treatment are respectively followed by washing with water until the pH of the effluent is neutral.
In one embodiment, the acid treatment and the base treatment are continuous operations, and the acid treatment and the base treatment are repeated a plurality of times.
It should be noted that the acid treatment and the alkali treatment repeated a plurality of times are used for further removing impurities from the negative resin layer and transforming the negative resin layer.
In one embodiment, the regeneration operation is to introduce regeneration alkali liquor into the negative resin layer, soak for 12-18h, and wash with water until the pH is neutral;
the dosage of the regenerated alkali liquor is 2-3 times the volume of the anion resin layer.
In one embodiment, the regenerated alkaline solution is a mixed solution of 2-5% sodium hydroxide and 0.2-1% sodium chloride.
The method for treating and regenerating a water-treating anion resin of the present invention can be used for treating and regenerating an anion resin having a maximum exchange capacity.
The invention discloses a method for treating and regenerating a negative resin for water treatment, which has the beneficial effects that compared with the prior art:
the treatment and regeneration method of the anion resin for water treatment greatly improves the treatment effect and the running exchange performance of the new resin; the treated new resin almost contains no impurities, so that the regeneration period is reduced, and the acid-base consumption is reduced; meanwhile, the emission of acid-base wastewater and the wastewater treatment cost are reduced, the purposes of energy conservation and consumption reduction are achieved, and the effect is remarkable; meanwhile, the acid-base pretreatment can be repeatedly performed for a plurality of times according to the situation, so that the effect is better, and the stability of the treated new resin can be obviously improved.
Drawings
FIG. 1 is a flow chart showing a method for treating and regenerating a water treatment anion resin according to an embodiment of the present invention;
FIG. 2 is a view showing a part of an apparatus for a treatment and regeneration method of a water treatment anion resin according to an embodiment of the present invention.
In the figure, a 100-bed water washing valve; 101. a first drain valve; 102. a water inlet valve of the water tank of the female bed; 103. a second drain valve; 104. an acid inlet valve; 105. an acid inlet valve of the negative bed; 106. an alkali inlet valve; 107. a negative bed alkali inlet valve; 108. a positive washing drain valve of the negative bed; 109. a bottom drain valve; 110. and a regenerated alkali liquor valve.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 2, a partial plant view of a water treatment female resin, the plant may perform functions including:
forward washing: high purity water flows in from the intermediate tank through the female bed tank water inlet valve 102 to flush the female resin layer and is discharged by the female bed positive flush drain valve 108;
large backwash: high purity water flows in from the intermediate water tank through the female water tank water inlet valve 102 to flush the female resin layer and is discharged by the second water discharge valve 103;
pretreatment, acid treatment and alkali treatment: hydrochloric acid solution or sodium hydroxide solution may enter the apparatus through an acid inlet valve 104, a bed acid inlet valve 105 or an alkali inlet valve 106, a bed alkali inlet valve 107, respectively.
Regeneration: the mixed solution of sodium hydroxide and sodium chloride flows into the device through a regenerated alkali liquor valve 110 and is discharged through a bottom drain valve 109.
Example 1
And recovering the system after filling the resin, firstly, performing water injection leakage detection on the negative bed system, and performing inspection treatment on positions such as a manhole and the like to ensure that the whole negative bed system is free from leakage.
1. Washing: the water in the middle water tank is used for large backwashing, the water injection speed is increased to 2m/h in a gradient way with the increment of 0.4m/h, and the expansion rate is 50-70% until the water is clear, odorless and finely crushed resin is not produced.
2. Pretreatment: the washed anion resin was soaked in 5% hydrochloric acid solution twice the resin volume for 4 hours and then drained. Washing with clear water until the effluent is nearly neutral, introducing 2% sodium hydroxide solution twice the volume of the resin, soaking for 4 hours, discharging, and washing with clear water until the pH is nearly neutral.
3. Acid treatment: opening an alkali inlet valve of the anion bed, adjusting the acid inlet concentration to 5%, enabling the acid liquor to be higher than the resin layer by 100mm through a 5% hydrochloric acid solution at a flow rate of 2m/h, stopping acid inlet, soaking for 18 hours, and flushing with clear water until the pH value of the effluent is neutral.
4. Alkali treatment: recovering the acid-base system, opening an alkali inlet valve of the anion bed, enabling the alkali liquor to be 100mm higher than the resin layer after the alkali liquor is fully introduced through the resin layer at a flow rate of 2m/h by using a 5% NaOH solution, stopping alkali inlet, and soaking for 18 hours.
And (3) opening a positive washing drain valve of the negative bed, and stopping washing after the water outlet of the negative bed is close to neutral.
5. The acid treatment and the alkali treatment were repeated 3 times.
6. Regeneration: and (3) introducing a mixed solution of 2% sodium hydroxide solution and 0.2% sodium chloride into the negative resin layer, soaking for 12h, washing with water until the pH is neutral, and detecting the water quality of the effluent water, wherein the negative resin layer is reserved.
Example 2
This embodiment differs from embodiment 1 in that:
pretreatment: the washed anion resin was immersed in a solution of 7% hydrochloric acid 2 times the resin volume for 6 hours and then drained. Washing with clear water until the effluent is nearly neutral, introducing 4% sodium hydroxide solution which is 2 times of the volume of the resin, soaking for 6 hours, discharging, and washing with clear water until the pH is nearly neutral.
Example 3
This embodiment differs from embodiment 1 in that:
pretreatment: the washed anion resin was immersed in a 10% hydrochloric acid solution 2 times the resin volume for 8 hours and then drained. Washing with clear water until the effluent is nearly neutral, introducing 6% sodium hydroxide solution which is 2 times of the volume of the resin, soaking for 8 hours, discharging, and washing with clear water until the pH is nearly neutral.
Example 4
This embodiment differs from embodiment 1 in that:
pretreatment: the washed anion resin was immersed in a 5% hydrochloric acid solution 3 times the resin volume for 4 hours and then drained. Washing with clear water until the effluent is nearly neutral, introducing 2% sodium hydroxide solution which is 3 times of the volume of the resin, soaking for 4 hours, discharging, and washing with clear water until the pH is nearly neutral.
Example 5
This embodiment differs from embodiment 2 in that:
pretreatment: the washed anion resin was immersed in a 7% hydrochloric acid solution 3 times the resin volume for 6 hours and then drained. Washing with clear water until the effluent is nearly neutral, introducing 4% sodium hydroxide solution which is 3 times of the volume of the resin, soaking for 6 hours, discharging, and washing with clear water until the pH is nearly neutral.
Example 6
This embodiment differs from embodiment 3 in that:
pretreatment: the washed anion resin was immersed in a 10% hydrochloric acid solution 3 times the resin volume for 8 hours and then drained. Washing with clear water until the effluent is nearly neutral, introducing 6% sodium hydroxide solution which is 3 times of the volume of the resin, soaking for 8 hours, discharging, and washing with clear water until the pH is nearly neutral.
Example 7
This embodiment differs from embodiment 1 in that:
acid treatment: opening an alkali inlet valve of the anion bed, adjusting the acid inlet concentration to 3%, enabling the acid liquor to pass through the resin layer at a flow rate of 2m/h by using a 3% hydrochloric acid solution, enabling the acid liquor to be 100mm higher than the resin layer, stopping acid inlet, soaking for 18 hours, and flushing with clear water until the pH value of the effluent is neutral.
Example 8
This embodiment differs from embodiment 7 in that: in the acid treatment operation, the hydrochloric acid solution was 8% in concentration.
Example 9
This embodiment differs from embodiment 1 in that:
alkali treatment: recovering the acid-base system. Opening an alkali inlet valve of the anion bed, adjusting the alkali inlet concentration to be 3%, enabling the alkali liquor to be 100mm higher than the resin layer after the alkali liquor is fully introduced through the resin layer by using a 3% NaOH solution at a flow rate of 2m/h, stopping alkali inlet, and soaking for 18 hours.
Example 10
This embodiment differs from embodiment 7 in that: in the alkali treatment operation, the concentration of the sodium hydroxide solution was 8%.
Example 11
This embodiment differs from embodiment 1 in that:
acid treatment: opening an alkali inlet valve of the anion bed, adjusting the acid inlet concentration to 5%, enabling the acid liquor to be higher than the resin layer by 100mm through a 5% hydrochloric acid solution at a flow rate of 2m/h, stopping acid inlet, soaking for 15 hours, and flushing with clear water until the pH value of the effluent is neutral.
Alkali treatment: recovering the acid-base system. Opening an alkali inlet valve of the anion bed, adjusting the alkali inlet concentration to be 5%, enabling the alkali liquor to be 100mm higher than the resin layer after the alkali liquor is fully introduced through the resin layer by using a 5% NaOH solution at a flow rate of 2m/h, stopping alkali inlet, and soaking for 15 hours.
Example 12
This embodiment differs from embodiment 1 in that: the soaking time of the acid treatment and the alkali treatment is 12 hours.
Example 13
This embodiment differs from embodiment 1 in that: the acid treatment and the alkali treatment are repeated once.
Example 14
This embodiment differs from embodiment 1 in that: the acid treatment and the alkali treatment were repeated twice.
Example 15
This embodiment differs from embodiment 1 in that: the regenerated alkali solution is a mixed solution of 5% sodium hydroxide and 1% sodium chloride, and the consumption of the regenerated alkali solution is three times of the physical strength of the anion resin layer.
Comparative example 1
This comparative example differs from example 1 in that: the large backwash operation is replaced with a normal backwash.
Comparative example 2
This comparative example differs from example 1 in that: in the step (1), the water outlet speed of gradient increase is not set in the water washing operation, namely the initial water outlet speed is 2m/h.
Comparative example 3
This comparative example differs from example 1 in that: and a pretreatment step, wherein the washed anion resin is soaked in 3% hydrochloric acid solution with the volume 2 times of that of the resin for 6 hours and then discharged. Washing with clear water until the effluent is nearly neutral, introducing 1% sodium hydroxide solution which is 2 times of the volume of the resin, soaking for 6 hours, discharging, and washing with clear water until the pH is nearly neutral.
Comparative example 4
This comparative example differs from example 1 in that: the soaking time of the acid treatment and the alkali treatment is 10 hours.
Comparative example 5
This comparative example differs from example 1 in that: the regenerated alkali liquor is 2% sodium hydroxide solution.
The present invention was conducted for the detection of conductivity, silicon content, etc. of the resins after the regeneration treatment of examples and comparative examples, and the results are shown in table 1:
TABLE 1
Note that: the mass change rate of the negative resin layer is as follows: after reaching an operating cycle, the absolute value of the amplitude of the mass change before and after the negative resin layer.
From the above table data, it can be seen that: the water quality conductivity of the treatment and regeneration method of the anion resin for water treatment is obviously reduced, and the average conductivity is less than 1 mu S/cm; the silicon content of the treated water is less than 40 mug/L; notably, the conductivity measured in the examples herein is lower than or very close to that of high purity water, i.e., the conductive medium (impurity ions) in the water is almost completely removed, and the undissociated colloidal materials, gases and organics in the water are removed to a very low extent; the comparative example 1 changes the large backwash operation to the common backwash, the measured conductivity value is lower, which shows that the impurity ion content in water is low, but the quality change rate of the anion resin layer before and after treatment is higher, because the common backwash can not completely remove solid insoluble impurities, but the solid insoluble impurities are gradually flushed out along with the treated water during the subsequent operation, so that the quality change rate of the anion resin layer is higher; the quality change rate of the negative resin layer in the comparative example 2 is too high because the initial water outlet speed of the water washing operation is too high, part of new resin is broken by water flow or the instantaneous water absorption speed of the resin layer is too high, the resin layer is broken by extrusion when the volume of the resin layer is not expanded, and waste resin can be observed when the water outlet quality is detected; the conductivity of the treated resin layer after the comparative examples 3, 4 and 5 reach one operation period is greatly changed because the concentration of the acid solution and the alkali solution is insufficient, the soaking time of the acid solution and the alkali solution is too short or the regeneration is insufficient, so that the resin layer is not completely replaced, i.e. the treated resin layer does not reach the maximum exchangeable capacity.
Because the impurities in the resin are mostly removed, the treatment effect of the new resin and the improvement of the running exchange performance are greatly improved; the regeneration period is reduced, and the acid-base consumption is reduced; meanwhile, the acid-base wastewater discharge and wastewater treatment cost are reduced, the purposes of energy conservation and consumption reduction are achieved, the effect is remarkable, the method is applied to a first station water treatment #1 negative bed and a second station water treatment #2 negative bed of a certain power plant, the operation period is respectively increased from about 200 hours to more than 600 hours, and the period water yield is increased from about 20000 tons to more than 60000 tons.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for treating and regenerating a water treatment anion resin is characterized by comprising the following steps:
(1) Washing: carrying out large backwashing on water injection of the negative resin layer, and slowly increasing the water injection speed;
(2) Pretreatment: soaking the negative resin layer in acid liquor and alkali liquor respectively for 4-8 hours for a single time, and regulating the pH value to be neutral;
(3) Regeneration: and (3) introducing regenerated alkali liquor into the negative resin layer.
2. The method for treating and regenerating a water treatment anion resin according to claim 1, wherein the step (1) is preceded by water injection leak detection.
3. The method for treating and regenerating a water-treating female resin according to claim 1, wherein the water injection speed is slowly increased to 2m/h.
4. The method for treating and regenerating a water-treating anion resin according to claim 1, wherein the acid solution is a 5-10% hydrochloric acid solution; the alkali liquor is 2-6% sodium hydroxide solution; the dosage of the acid liquor and the alkali liquor is 2-3 times of the volume of the negative resin layer; the operation of adjusting the pH is to rinse the negative resin layer with clear water and detect the pH of the clear water after rinsing.
5. The method for treating and regenerating a water-treating anion resin as set forth in claim 1, further comprising, before the regenerating step:
acid treatment: introducing 3-8% hydrochloric acid solution into the negative resin layer, and soaking for 12-18h after the introduction of the hydrochloric acid solution is finished;
alkali treatment: and 3-8% sodium hydroxide solution is used for introducing the negative resin layer, and soaking is carried out for 12-18h after the introduction of the sodium hydroxide solution is finished.
6. The method for treating and regenerating a water-treating anion resin according to claim 5, wherein the acid treatment and the alkali treatment are each followed by washing with water until the pH of the effluent becomes neutral.
7. The method for treating and regenerating a water-treating anion resin according to claim 5, wherein the acid treatment and the alkali treatment are continuously operated, and the acid treatment and the alkali treatment are each repeatedly operated a plurality of times.
8. The method for treating and regenerating a water-treating anion resin according to claim 1, wherein the regenerating operation is to introduce a regenerating alkali solution into the anion resin layer, soak for 12-18 hours, and rinse with water until the pH becomes neutral;
the dosage of the regenerated alkali liquor is 2-3 times the volume of the anion resin layer.
9. The method for treating and regenerating a water-treating anion resin according to claim 8, wherein the regenerating alkali solution is a mixed solution of 2-5% sodium hydroxide and 0.2-1% sodium chloride.
10. The method for treating and regenerating a water-treating anion resin according to any one of claims 1 to 9, wherein the method is used for treating and regenerating the anion resin having a maximum exchange capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310150602.4A CN116237090A (en) | 2023-02-21 | 2023-02-21 | Method for treating and regenerating negative resin for water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310150602.4A CN116237090A (en) | 2023-02-21 | 2023-02-21 | Method for treating and regenerating negative resin for water treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116237090A true CN116237090A (en) | 2023-06-09 |
Family
ID=86627346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310150602.4A Pending CN116237090A (en) | 2023-02-21 | 2023-02-21 | Method for treating and regenerating negative resin for water treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116237090A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724167A (en) * | 2005-05-27 | 2006-01-25 | 哈尔滨工业大学 | Process for reactivating gel type strong base negative resin of polluted in industrial water treatment |
| CN101450331A (en) * | 2008-12-17 | 2009-06-10 | 牛继星 | Ion exchange resin regeneration technique capable of saving acid and alkali |
| JP2009279561A (en) * | 2008-05-26 | 2009-12-03 | Kurita Water Ind Ltd | Treatment method and treatment apparatus for water soluble resin component-containing alkaline waste liquid |
| CN103071547A (en) * | 2013-02-03 | 2013-05-01 | 苏州思德新材料科技有限公司 | Method for regenerating inactivated strongly acidic cation-exchange resin |
| CN108704674A (en) * | 2018-06-30 | 2018-10-26 | 神华国华广投（柳州）发电有限责任公司 | A kind of highly efficient regeneration method of hybrid resin |
| CN111533216A (en) * | 2020-05-12 | 2020-08-14 | 江西晶昊盐化有限公司 | Method for recovering anion and cation resin |
| CN113499805A (en) * | 2021-07-29 | 2021-10-15 | 鄯善万顺发新能源科技有限公司 | Method for regenerating purifying column of ultrapure water purifier |
| CN114570440A (en) * | 2022-03-17 | 2022-06-03 | 山东钢铁集团永锋临港有限公司 | Novel efficient restoration method for anion-cation resin |
| CN114618595A (en) * | 2022-03-11 | 2022-06-14 | 山东钢铁集团永锋临港有限公司 | Novel efficient restoration technology for anion-cation resin |
-
2023
- 2023-02-21 CN CN202310150602.4A patent/CN116237090A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724167A (en) * | 2005-05-27 | 2006-01-25 | 哈尔滨工业大学 | Process for reactivating gel type strong base negative resin of polluted in industrial water treatment |
| JP2009279561A (en) * | 2008-05-26 | 2009-12-03 | Kurita Water Ind Ltd | Treatment method and treatment apparatus for water soluble resin component-containing alkaline waste liquid |
| CN101450331A (en) * | 2008-12-17 | 2009-06-10 | 牛继星 | Ion exchange resin regeneration technique capable of saving acid and alkali |
| CN103071547A (en) * | 2013-02-03 | 2013-05-01 | 苏州思德新材料科技有限公司 | Method for regenerating inactivated strongly acidic cation-exchange resin |
| CN108704674A (en) * | 2018-06-30 | 2018-10-26 | 神华国华广投（柳州）发电有限责任公司 | A kind of highly efficient regeneration method of hybrid resin |
| CN111533216A (en) * | 2020-05-12 | 2020-08-14 | 江西晶昊盐化有限公司 | Method for recovering anion and cation resin |
| CN113499805A (en) * | 2021-07-29 | 2021-10-15 | 鄯善万顺发新能源科技有限公司 | Method for regenerating purifying column of ultrapure water purifier |
| CN114618595A (en) * | 2022-03-11 | 2022-06-14 | 山东钢铁集团永锋临港有限公司 | Novel efficient restoration technology for anion-cation resin |
| CN114570440A (en) * | 2022-03-17 | 2022-06-03 | 山东钢铁集团永锋临港有限公司 | Novel efficient restoration method for anion-cation resin |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105481057A (en) | Synchronous decoloration and nitrogen recovery method for high-concentration printing waste liquids | |
| CN107362835A (en) | A kind of one-level DW system demineralized water system negative and positive bed renovation process | |
| CN206089281U (en) | Steel industry sulphuric acid pickling liquid waste's processing recovery system | |
| CN103058408B (en) | Power generation industries waste water recycling device method and treatment for reuse system | |
| CN104030496B (en) | A kind of dense oil extraction wastewater degree of depth sofening treatment reuse method | |
| CN108793652B (en) | Pickling sludge recycling treatment device and technology | |
| CN205062185U (en) | Alkaline etching waste liquid resource recycling processing apparatus | |
| CN107971047B (en) | Method and device for recycling industrial soft water acid-base regeneration liquid | |
| CN202151529U (en) | Recycling device for titanium white postprocessing washing liquid | |
| CN116237090A (en) | Method for treating and regenerating negative resin for water treatment | |
| CN103011452A (en) | High efficiency ion exchange electroplating wastewater reuse treatment system | |
| CN210419536U (en) | Ion exchange resin fluidized bed device | |
| CN102408167B (en) | Method for realizing grey water recycling of sewage produced in waste mortar recovery process | |
| CN216063306U (en) | Activated carbon treatment equipment | |
| CN217568776U (en) | Mixed bed device capable of recycling regenerated wastewater | |
| CN113044919B (en) | Power plant condensate fine treatment process and device | |
| CN111068361B (en) | Caprolactam ion exchange device and regeneration method thereof | |
| CN208717127U (en) | A kind of pickling sludge resource processing apparatus | |
| JP5665002B2 (en) | Treatment method for fluorine-containing wastewater | |
| CN214780916U (en) | Fine treatment device for condensate water in power plant | |
| CN221479706U (en) | Nickel-containing and ammonia nitrogen gypsum treatment system | |
| CN220364447U (en) | Device for recycling regenerated wastewater of primary desalting system in segmented mode | |
| CN216972077U (en) | Regenerating device of decarburizer-free demineralized water ion exchanger | |
| CN204544212U (en) | Cationic ion-exchange resin iron poisoning recovery treatment facility | |
| CN114477521B (en) | Electrolytic manganese dioxide wastewater treatment and manganese recycling method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |