CN112851835A - Device for preparing strong acid sodium type resin - Google Patents
Device for preparing strong acid sodium type resin Download PDFInfo
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- CN112851835A CN112851835A CN202110261256.8A CN202110261256A CN112851835A CN 112851835 A CN112851835 A CN 112851835A CN 202110261256 A CN202110261256 A CN 202110261256A CN 112851835 A CN112851835 A CN 112851835A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/01—Processes of polymerisation characterised by special features of the polymerisation apparatus used
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G85/00—General processes for preparing compounds provided for in this subclass
- C08G85/004—Modification of polymers by chemical after-treatment
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- General Chemical & Material Sciences (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention aims to disclose a device for preparing strong acid sodium type resin, which comprises a transformation solution tank, a resin preparation bed, a recovery solution tank and a resin collecting tank, wherein the output end of the transformation solution tank is respectively connected with the water inlet of the resin preparation bed and the input end of the recovery solution tank through a pump, the output end of the recovery solution tank is connected with the input end of the transformation solution tank through a pump, the water outlet of the resin preparation bed is connected with the transformation solution tank, the output end of the resin preparation bed is connected with the resin collecting tank, and an online pH meter and an online conductivity meter are respectively arranged at the water inlet and the water outlet of the resin preparation bed; compared with the prior art, the NaOH solution capable of quickly generating the neutralization ion exchange reaction carries out sodium type group transformation on the strong acid cation resin, the reaction is thorough to ensure that the sodium type transformation rate is more than 99.9 percent, the reaction speed is high, the resin is not damaged, the preparation efficiency and the safety of the resin are improved, and the purpose of the invention is realized.
Description
Technical Field
The invention relates to a device for preparing resin, in particular to a device for preparing strong-acid sodium type resin, which is suitable for nuclear power plants, thermal power plants, frequency converter enterprises and the like.
Background
The water quality of a cold water system in a power plant and the insulation performance of a generator are closely related to the corrosion rate of a copper wire rod, and the operation safety of a unit is directly influenced by the quality of water quality control. The national standard has strict requirements on the quality of internal cooling water, and mainly comprises pH value, conductivity and copper content, the GB/T1039-2016 generator internal cooling water treatment guide rule stipulates that the pH value of stator cooling water is 8.0-9.0, the conductivity is less than or equal to 2.0 mu s/cm (25 ℃), the copper ion content is less than or equal to 20 mu g/L, and the value recommended in the national standard is a water chemistry control index which must be met, but in actual operation, in order to reduce the loop corrosion to the minimum degree, the optimal water chemistry control range is that the pH value is 8.0-8.5, the conductivity is less than or equal to 1.0 mu s/cm (25 ℃), and the copper ion content is less than or equal to 5 mu g/L. The adoption of a sodium resin bed to achieve the above-mentioned goals is the process which is preferred in the industry at present, and the process has the advantages of simple operation and maintenance and safe and reliable operation, and can realize the chemical regulation of the water in the loop under the background without impurities.
The inner cooling water purification loop adopts a sodium type resin bed, namely sodium ions are released to be combined with trace hydroxide ions in water through trace cations (such as impurity cations of copper, ammonia, iron and the like and water ionized hydrogen ions) in a sodium type cation resin exchange loop, so that trace NaOH is contained in the outlet water, the requirement of the water conductivity of the loop is met, and the requirement of the pH value is met.
A typical ion exchange reaction equation is as follows: RNA + Cu2+/H+----R2Cu+Na+OH-
The most core product of the process is the sodium type cation resin, and the completeness, integrity, sodium type conversion rate and conversion group distribution uniformity of the sodium type cation resin after conversion directly determine the service life, effluent stability and the capacity of adjusting the pH value and conductivity of the loop water of the resin, so that how to ensure the conversion rate and the conversion group distribution uniformity of the sodium type cation resin has important significance for adjusting the market of the alkalinity of the internal cold water. Meanwhile, a large amount of chemicals such as salt or alkali are consumed in the sodium resin transformation process, and if a proper preparation device is not matched, the problems of resource waste, transformation cost increase, environmental pollution and the like are caused.
The transformation device is also one of the key factors for ensuring the integrity, the sodium transformation rate and the distribution uniformity of the transformation groups of the sodium-type resin after transformation.
Therefore, an apparatus for preparing a strongly acidic sodium type resin is particularly required to solve the above existing problems.
Disclosure of Invention
Aiming at the defects of the prior art, the device for preparing the strong-acid sodium type resin realizes the automatic control of the transformation process based on the reaction rule and process of the strong-acid cation resin and sodium hydroxide, improves the resource utilization rate, ensures that each batch of products obtains the sodium type transformation rate of more than 99.9 percent, does not cause the breakage or the generation of cracks of the resin in the transformation process, does not waste transformation agents, does not contain acid or alkali in water discharged in all transformation processes, has low salt concentration, realizes the zero emission of waste liquid, and realizes the optimization of resources and environmental protection.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the utility model provides a device of preparation strong acidic sodium type resin, its characterized in that, includes transformation solution tank, resin preparation bed, retrieves solution tank and resin collecting vat, the output of transformation solution tank passes through the pump and connects respectively the water inlet of resin preparation bed with retrieve the input of solution tank, the output of retrieving the solution tank pass through the pump with the input of transformation solution tank is connected, the delivery port of resin preparation bed with the transformation solution tank is connected, the output of resin preparation bed with the resin collecting vat is connected the water inlet and the delivery port of resin preparation bed are provided with online pH meter and online conductivity meter respectively.
In one embodiment of the invention, the transformation solution tank is used for filling 1-8% NaOH solution, the volume of the transformation solution tank is 1-2 times of that of the resin to be transformed, and the inside of the transformation solution tank is provided with a stirring paddle for preparing the NaOH solution.
In one embodiment of the invention, the bottom of the resin preparation bed is provided with a water cap, and the water outlet at the top of the resin preparation bed is provided with a resin retaining filter screen for sodium resin transformation and cleaning.
In one embodiment of the invention, the recovery solution tank is used for collecting the incomplete NaOH solution in the later stage of the preparation of the sodium resin, the volume of the recovery solution tank is 1-2 times of the volume of the converted resin, and the recovery solution tank is internally provided with a stirring paddle.
In one embodiment of the invention, the bottom of the resin collecting tank is provided with a resin interception filter screen and a vacuum suction pump, and the resin interception filter screen and the vacuum suction pump are used for quickly and efficiently removing free moisture after the sodium resin is prepared and before packaging.
Compared with the prior art, the device for preparing the strong acid sodium type resin has the advantages that the NaOH solution capable of quickly generating the neutralization ion exchange reaction carries out sodium type group transformation on the strong acid cation resin, the reaction is thorough, the final sodium type transformation rate of the product is more than 99.9%, the reaction speed is high, and the resin preparation efficiency is improved; the method realizes transformation by adopting the step-by-step reaction of transformation chemicals with resin from low concentration to high concentration, and contacts high-concentration alkali liquor after the group reaction exceeds 50 percent, thereby avoiding severe volume shrinkage and reaction heat release caused by rapid neutralization of ion exchange reaction in the resin under the condition of over-high alkali concentration in the initial stage, avoiding resin breakage and crack generation, further avoiding the problems of resin loss, further post-treatment, high pressure difference in operation, water cap blockage, corrosion caused by leakage to a loop and the like in the transformation process, and realizing the purpose of the invention.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
Fig. 1 is a schematic structural view of an apparatus for producing a strongly acidic sodium type resin according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Examples
As shown in figure 1, the device for preparing strong acid sodium type resin of the invention comprises a transformation solution tank 1, a resin preparation bed 2, a recovery solution tank 3 and a resin collecting tank 4, wherein the output end of the transformation solution tank 1 is respectively connected with the water inlet of the resin preparation bed 2 and the input end of the recovery solution tank 3 through a pump 5, the output end of the recovery solution tank 3 is connected with the input end of the transformation solution tank 1 through the pump 5, the water outlet of the resin preparation bed 2 is connected with the transformation solution tank 1, the output end of the resin preparation bed 2 is connected with the resin collecting tank 4, and an online pH meter 6 and an online conductivity meter 7 are respectively arranged at the water inlet and the water outlet of the resin preparation bed 2.
In this example, the transformation solution tank 1 is used for filling 1-8% NaOH solution, the volume of the transformation solution tank 1 is 1-2 times of the resin to be transformed, and the inside of the transformation solution tank 1 is provided with a stirring blade for preparing NaOH solution.
In this embodiment, the bottom of the resin preparation bed 2 is provided with a water cap, and the water outlet at the top of the resin preparation bed 2 is provided with a resin interception filter screen for sodium resin transformation and cleaning.
In this embodiment, the recovery solution tank 3 is used for collecting the unreacted NaOH solution in the later stage of the preparation of the sodium resin, the volume of the recovery solution tank 3 is 1-2 times of the volume of the converted resin, and the inside of the recovery solution tank 3 is provided with a stirring paddle.
In this embodiment, the bottom of the resin collecting tank 4 is configured with a resin interception filter screen and a vacuum suction pump for quickly and efficiently removing free moisture after the preparation of the sodium resin is finished and before the sodium resin is packaged.
The working process of the device for preparing the strong acid sodium type resin comprises the following steps:
when a batch of strong-acid cation resin is subjected to sodium conversion preparation, sodium hydroxide is added into a conversion solution tank 1, a NaOH solution with the target concentration of 1-3% and the volume 1-2 times that of the prepared resin is prepared, after cyclic reaction is carried out for 2 times, a 4-8% NaOH solution with the volume 1-2 times that of the resin is prepared into the conversion solution tank 1, whether the solution is recovered into a recovery solution tank 3 or not is determined according to the change trend of the reaction pH and the conductivity of the solution, whether the solution is discharged or enters the recovery solution tank 3 is fed back through a signal, and the reaction end point is also determined. And (3) leaching the resin in the resin preparation bed 2 by adopting ultrapure water at the rate of 2-10BV/h after the reaction of the sodium type groups is finished, and determining a leaching end point according to the conductivity and the pH value of the effluent. And finally, hydraulically conveying the resin subjected to sodium type transformation in the resin preparation bed 2 to a resin collecting tank 4 by using ultrapure water, starting a vacuum suction pump to remove residual free water in the resin after the water is drained, and finally filling the resin into a packaging bag or a packaging barrel.
The device for preparing the strong-acid sodium type resin solves the following problems:
1. the problems that the reaction speed is low and the transformation is incomplete due to the fact that the NaCl solution is adopted in the traditional sodium resin preparation method are solved, and the problems that the transformation reaction speed is too high due to the fact that the resin is rapidly shrunk and the resin is rapidly released to cause resin breakage and cracks in the transformation process due to the fact that the high-concentration alkali solution is adopted in the traditional sodium resin preparation method are solved;
2. the problems that the reaction speed is low and the distribution of the sodium groups of the resin particles is not uniform in the traditional static soaking preparation method are solved, and the problem that the transformation rate of the upper resin is better than that of the lower resin in the traditional forward flow dynamic transformation mode to cause non-uniform transformation is also solved;
3. solves the problems that the reaction end point is difficult to monitor in the traditional preparation process, a large amount of salt or alkali waste liquid is generated in the transformation process, and the like.
4. The problem that the stability of the resin during storage is influenced due to the fact that part of free water is left due to traditional gravity drainage is solved, and the problem that part of processes need to adopt a complex centrifugal process to remove the free water is also solved.
The device for preparing the strong acid sodium type resin has the following characteristics:
1. the NaOH solution capable of quickly generating neutralization ion exchange reaction carries out sodium type group transformation on the strong acid cation resin, the reaction is thorough, so that the final sodium type transformation rate of the product is ensured to be more than 99.9%, the reaction speed is high, and the resin preparation efficiency is improved; the transformation is realized by adopting the step-by-step reaction of transformation chemicals with resin from low concentration to high concentration, and the high-concentration alkali liquor is contacted after the group reaction exceeds 50 percent, so that the severe volume shrinkage and reaction heat release caused by the rapid neutralization of ion exchange reaction in the resin under the condition of over-high alkali concentration in the initial stage are avoided, and the resin is prevented from being broken and cracked, thereby further avoiding the problems of resin loss, further post-treatment, high pressure difference in operation, water cap blockage, corrosion caused by leakage to a loop and the like in the transformation process.
2. The mode that the batch conversion solution passes through the resin bed from bottom to top is adopted, the resin conversion process is always in a vertical suspension state, the resin is uniformly and fully contacted with the conversion solution with the same concentration, the exchange of the resin and the solution is accelerated, the conversion uniformity among resin particles is ensured, and the stability of the water quality of the sodium resin in field operation is finally ensured.
3. The on-line pH value and conductivity are installed at the inlet and the outlet of the resin preparation bed, so that the configuration condition and the transformation reaction process of the transformation solution are monitored in time, the chemical addition amount, the solution recovery reaction point and the final transformation end point can be automatically calculated through the relationship between the pH value and the conductivity and the concentration of the NaOH solution, the transformation stability among batches is controlled, the unreacted NaOH solution is recovered while the high-concentration excessive transformation is guaranteed, the consumption of chemicals is saved, the neutral low-conductivity water and the final rinse water generated in the intermediate reaction are recovered to an ultrapure water preparation raw water tank, the zero discharge of wastewater in the transformation process is realized, and the economy and the environmental friendliness are improved;
4. through designing a resin receiving tank of taking filter screen and vacuum suction pump, can get rid of most resin free moisture through gravity drainage earlier, then remaining difficult free water of getting rid of in the rethread cavity suction gets rid of the bottom, and remaining free water is less than 1% in the guarantee treats the packing resin, prolongs the shelf life of resin, and the guarantee is filled back resin bed quick start and is avoided leading to the return circuit quality of water problem that organic acid release arouses because free water remains too much.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (5)
1. The utility model provides a device of preparation strong acidic sodium type resin, its characterized in that, includes transformation solution tank, resin preparation bed, retrieves solution tank and resin collecting vat, the output of transformation solution tank passes through the pump and connects respectively the water inlet of resin preparation bed with retrieve the input of solution tank, the output of retrieving the solution tank pass through the pump with the input of transformation solution tank is connected, the delivery port of resin preparation bed with the transformation solution tank is connected, the output of resin preparation bed with the resin collecting vat is connected the water inlet and the delivery port of resin preparation bed are provided with online pH meter and online conductivity meter respectively.
2. The apparatus for preparing a strongly acidic sodium-type resin according to claim 1, wherein the conversion solution tank is filled with a 1-8% NaOH solution, the conversion solution tank has a volume 1-2 times that of the resin to be converted, and the conversion solution tank is internally provided with a stirring paddle for the NaOH solution.
3. The apparatus for preparing strongly acidic sodium-type resin according to claim 1, wherein a water cap or an entrapment screen is provided at the bottom of the resin preparation bed, and a resin entrapment screen for sodium-type resin conversion and cleaning is provided at the water outlet at the top of the resin preparation bed.
4. The apparatus for preparing strongly acidic sodium-type resin according to claim 1, wherein the recovery solution tank is used for collecting the NaOH solution which is not completely reacted in the later stage of the preparation of sodium-type resin, the volume of the recovery solution tank is 1-2 times of the volume of the converted resin, and the recovery solution tank is internally provided with a stirring paddle.
5. The apparatus for preparing strongly acidic sodium-type resin according to claim 1, wherein the bottom of the resin collecting tank is provided with a resin retaining screen and a vacuum suction pump for rapidly and efficiently removing free moisture after the sodium-type resin is prepared and before packaging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110261256.8A CN112851835B (en) | 2021-03-10 | 2021-03-10 | Device for preparing strong acid sodium resin |
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| CN202110261256.8A CN112851835B (en) | 2021-03-10 | 2021-03-10 | Device for preparing strong acid sodium resin |
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| CN112851835A true CN112851835A (en) | 2021-05-28 |
| CN112851835B CN112851835B (en) | 2023-07-25 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1896009A (en) * | 2006-06-09 | 2007-01-17 | 江西省电力科学研究院 | Alkalescent water-quality treatment and treating system for double-internal water-cooled generator |
| CN101511478A (en) * | 2006-09-07 | 2009-08-19 | 陶氏环球技术公司 | Strong-acid cation exchange resins |
| CN204454694U (en) * | 2015-02-02 | 2015-07-08 | 神华神东电力有限责任公司技术研究院 | A kind of for 1000MW set generator internal cooling water device |
| CN204752272U (en) * | 2015-05-07 | 2015-11-11 | 长安益阳发电有限公司 | Large -scale generator inner cooling water complete set processing apparatus |
| CN109174211A (en) * | 2017-06-30 | 2019-01-11 | 上海轻工业研究所有限公司 | Device is monitored and controlled in the transition of ion exchange resin |
| CN109201124A (en) * | 2017-06-30 | 2019-01-15 | 上海轻工业研究所有限公司 | Method is monitored and controlled in the transition of ion exchange resin |
| CN211733919U (en) * | 2019-12-30 | 2020-10-23 | 上海核工程研究设计院有限公司 | Be used for interior cold water alkalization governing system of power plant |
| CN111943318A (en) * | 2020-08-28 | 2020-11-17 | 哈尔滨安泰利达科技开发有限公司 | Special resin for generator inner cooling water and preparation method thereof |
-
2021
- 2021-03-10 CN CN202110261256.8A patent/CN112851835B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1896009A (en) * | 2006-06-09 | 2007-01-17 | 江西省电力科学研究院 | Alkalescent water-quality treatment and treating system for double-internal water-cooled generator |
| CN101511478A (en) * | 2006-09-07 | 2009-08-19 | 陶氏环球技术公司 | Strong-acid cation exchange resins |
| CN204454694U (en) * | 2015-02-02 | 2015-07-08 | 神华神东电力有限责任公司技术研究院 | A kind of for 1000MW set generator internal cooling water device |
| CN204752272U (en) * | 2015-05-07 | 2015-11-11 | 长安益阳发电有限公司 | Large -scale generator inner cooling water complete set processing apparatus |
| CN109174211A (en) * | 2017-06-30 | 2019-01-11 | 上海轻工业研究所有限公司 | Device is monitored and controlled in the transition of ion exchange resin |
| CN109201124A (en) * | 2017-06-30 | 2019-01-15 | 上海轻工业研究所有限公司 | Method is monitored and controlled in the transition of ion exchange resin |
| CN211733919U (en) * | 2019-12-30 | 2020-10-23 | 上海核工程研究设计院有限公司 | Be used for interior cold water alkalization governing system of power plant |
| CN111943318A (en) * | 2020-08-28 | 2020-11-17 | 哈尔滨安泰利达科技开发有限公司 | Special resin for generator inner cooling water and preparation method thereof |
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| CN112851835B (en) | 2023-07-25 |
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