CN101234799A - Separating and regeneration method adapted for electric generator inner cooling water mixture iron exchange resin - Google Patents
Separating and regeneration method adapted for electric generator inner cooling water mixture iron exchange resin Download PDFInfo
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- CN101234799A CN101234799A CNA2007101683015A CN200710168301A CN101234799A CN 101234799 A CN101234799 A CN 101234799A CN A2007101683015 A CNA2007101683015 A CN A2007101683015A CN 200710168301 A CN200710168301 A CN 200710168301A CN 101234799 A CN101234799 A CN 101234799A
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Abstract
The invention discloses a method used for exchanging resin separation and regeneration of cold water mixed with ion in a generator. The method has the following steps: the failure negative and positive mixed with resin containing Cu type positive resin is placed into a liquor of (NH4)2SO4 with a density of 1.17g/cm<3> to 1.20g/cm <3> for soaking. After a complete reaction, the positive resin of NH4 type and the negative resin SO4 type are separated. The positive resin of NH4 type is then transported into the regeneration column of the positive column. The dilute (NH4)2SO4 liquor is used for leaching until obtaining the water without Cu, and the desalted water is then used for cleaning until obtaining the SO4<2-> ion, therefore, the complete regeneration positive resin of NH4 type is obtained. The SO4 is then transported to the regeneration column of the negative column. The sodium hydroxide liquor is taken as a regeneration agent and the regeneration is carried out according to the normal method. The method has the advantages of simple operation. The complete separation of the cold water mixed with ion exchange resin and a synchronous high degree regeneration of Cu type positive resin are effectively and economically realized. The regenerated resin can be reused as ion exchange resin of a cold weak alkalization treatment in the generator.
Description
Technical Field
The invention relates to a method suitable for separating and regenerating cold water mixed ion exchange resin in a generator, belonging to the technical field of electrical engineering and also belonging to the chemical field.
Background
At present, the generator stator and the double water internal cooling generator rotor copper conductor winding of a thermal power plant, a nuclear power plant and a large-scale hydroelectric power plant are generally cooled by low-conductivity pure water circulation. Under the influence of dissolved oxygen, pH value and water flow impact in cooling water, the hollow copper wire is easy to corrode, so that the conductivity of inner cooling water is increased, the insulation performance of a generator to the ground is influenced, corrosion product deposition is easy to occur, the cooling heat dissipation performance of a winding coil bar of the generator is influenced, and even the safe and economic operation of the generator is influenced. In order to eliminate the harm of poor quality of the internal cooling water, the internal cooling water of the engine is usually subjected to purification treatment or slightly alkalization treatment by adopting ion exchange resin. However, since the positive resin is a Cu-type resin after the internal cooling water resin fails, the conventional hydraulic separation method and the conventional salt water separation method are difficult to completely separate, so that the positive resin and the negative resin are cross-contaminated, or copper compound precipitation contamination is generated, the internal cooling water resin cannot be reused after the internal cooling water resin fails, the resin needs to be replaced with new resin, and the resin waste and the equipment operation cost are increased.
Disclosure of Invention
The invention aims to provide a method for separating and regenerating cold water mixed ion exchange resin in a generator, which realizes complete separation of invalid mixed ion exchange resin for cold water treatment in the generator and efficient regeneration of Cu type cation resin.
The technical scheme adopted for realizing the aim of the invention is as follows: a method for separating and regenerating cold water mixed ion exchange resin in a generator comprises the following steps: firstly, placing the failed mixed resin of the cathode and the anode containing the Cu-type anode resin into a container with the density of 1.17g/cm3～1.20g/cm3(NH)4)2SO4Soaking in solution, reacting completely, and converting the Cu-type cation resin and other cation resin in the failed mixed resin intoNH4The molded cation resin is deposited at the bottom of the solution; conversion of anionic resins of various ionic forms in spent mixed resins to SO4Type negative resin, floating on the upper part of the solution, NH4Type cation resin and SO4Separating the form anion resin, then separating NH4Transferring the molded cation resin to cation resin regeneration column, and diluting with diluted (NH)4)2SO4After the solution is leached until the water is free of Cu, the solution is washed by desalted water until the water is free of SO4 2-Ions, i.e. obtaining fully regenerated NH4Molding a cation resin, adding SO4Transferring the type negative resin to the negative resinIn the raw column, sodium hydroxide solution is used as a regenerant and regenerated according to a conventional method. Regenerated NH4The cation resin is used as cation exchange resin for the slightly alkalization treatment of cold water in the generator.
The separated NH4And (3) transforming the cation resin again by using hydrochloric acid or sodium chloride solution, respectively transforming the cation resin into H-type or Na-type resin according to a conventional treatment method, and using the transformed cation resin as cation exchange resin for slightly alkalizing cold water in the generator.
The density of the negative resin due to failure was 1.10g/cm3～1.15g/cm3The density of the failed cation resin is 1.25g/cm3～1.36g/cm3And (NH)4)2SO4The solution density was 1.17g/cm3～1.20g/cm3Between the cation resin and the anion resin, therefore (NH)4)2SO4The solution can completely separate the anion resin and the cation resin, the density of the anion resin is less than that of the solution, the anion resin floats on the upper layer of the solution, and the density of the cation resin is greater than that of the solution, and the cation resin is settled at the bottom of the solution. (NH)4)2SO4NH in solution4 +Ion and Cu in Cu type cation resin2+Ion exchange occurs between the ions and the exchanged Cu2+Ions are subjected to a complex reaction rapidly, and the cation exchange resin is synchronously and efficiently regenerated while the anion resin and the cation resin are completely separated.
During the resin separation and regeneration process, the following important reactions occur:
cu produced by reaction formula (1)2+Ion formation of Cu-NH according to reaction formula (2)3The complex, therefore, reaction formula (2) proceeds toward the right direction in favor of reaction formula (1), and the spent cation exchange resin can be highly regenerated.
With (NH)4)2SO4Soaking mixed resin of cathode and anode containing Cu type anode resin in the solution to obtain NH4 +Ion first reacts with Cu in Cu type cation resin2+Exchange reaction of ions and subsequent Cu exchange2+The ions generate complex reaction, and the reaction does not generate Cu2+The ions are precipitated, and the regeneration exchange reaction is favorably finished.
The invention will be described in (NH)4)2SO4The solution is used as heavy liquid floatation separating agent for inner cold water treatment failure resin, firstly, the solution is utilized to realize effective separation of anion resin and cation resin by proper density, and secondly, NH is utilized4Ion exchange reaction of ion with Cu-type resin and reaction with Cu2+The complex reaction of the ions realizes the synchronous high regeneration of the Cu-type cation resin. The method provided by the invention not only avoids the problems of insufficient density and peculiar smell of ammonia water and other ammonium salts, but also avoids the problems of precipitation, introduction of chloride ions harmful to a passive film and the like when other salts such as common NaCl and the like are used as aseparating agent, and realizes the complete separation of the ineffective cold water mixed ion exchange resin and the synchronous high regeneration of the Cu type cation resin. The regenerated resin can be repeatedly used as ions for the micro-alkalization treatment of cold water in the generatorAnd (4) exchanging resin.
Detailed Description
Example 1
Mixing deeply failed heterogeneous granular internal cooling water external cooling Resin (RA) containing Cu type external cooling resin1+RC1) Placing the mixture at a mass concentration of 30% and a density of 1.17g/cm3(NH)4)2SO4Stirring moderately in the solution, standing for a period of time, completely separating the mixed resin, and floating on the upper layer of the solution to obtain negative resin RA1(i.e., non-uniform particles R)2SO4) The lower layer of the solution is cation resin RC1(i.e., heterogeneous particle RNH)4) And the middle is a resin solution-free layer.
Subjecting the upper layer of the negative resin RA1(i.e., non-uniform particles R)2SO4) Transferring into an anion resin regeneration column, and regenerating according to the conventional regeneration step by taking NaOH solution with the concentration of 1mol/L as a regenerant. The lower layer of positive resin RC1(i.e., heterogeneous particle RNH)4) Transferring into cation resin regeneration column to obtain (NH) solution with concentration of 1mol/L4)2SO4The solution is used as eluent, the resin is leached at the flow speed of 5-10 m/h, the water quality of the effluent is detected, and no Cu is generated2+The ion immediately stopsrinsing. Then the resin is washed by desalted water, the quality of effluent is detected, and no SO is generated4 2-The ions are qualified after cleaning, and completely regenerated NH is obtained4A type positive resin. NH after qualified cleaning4The cation resin can be directly used as cation exchange resin for the slightly alkalization treatment of cold water in a generator.
Example 2
Mixing deeply failed homogeneous inner-cooling water-soluble cation Resin (RA) containing Cu-type cation resin2+RC2) Placing the mixture at a mass concentration of 35% and a density of 1.20g/cm3(NH)4)2SO4Stirring moderately in the solution, standing for a period of time, completely separating the mixed resin, floating on the upper part of the solution as the negative resin RA2The lower part of the solution is cation resin RC2And the middle is a resin solution-free layer.
Subjecting the upper layer of the negative resin RA2(i.e., homogeneous R)2SO4) Transferring into an anion resin regeneration column, and regenerating according to the conventional regeneration step by taking NaOH solution with the concentration of 1mol/L as a regenerant. The lower layer of positive resin RC2(i.e., homogeneous RNH)4) Transferring into cation resin regeneration column to obtain (NH) solution with concentration of 1mol/L4)2SO4The solution is a leacheate with the concentration of 5-10 m/hEluting the resin at a flow rate, detecting the water quality of the effluent without Cu2+The ion immediately stops rinsing. Then the resin is washed by desalted water, the quality of effluent is detected, and no SO is generated4 2-The ions are qualified after cleaning, and completely regenerated NH is obtained4A type positive resin. NH after qualified cleaning4The cation resin can be directly used as cation exchange resin for the slightly alkalization treatment of cold water in a generator.
Separating NH4The type cation resin is transformed into H type or Na type resin by using hydrochloric acid or sodium chloride solution as a transformation agent according to a conventional treatment method. The converted H-type or Na-type resin can also be used as cation exchange resin for slightly alkalizing cold water in a generator.
Claims (3)
1. A method suitable for separating and regenerating cold water mixed ion exchange resin in a generator is characterized by comprising the following steps:
placing the failed mixed resin containing Cu type anode resin in a density of 1.17g/cm3～1.20g/cm3(NH)4)2SO4Soaking in solution, reacting completely, and converting Cu type cation resin and other cation resin in ineffective mixed resin into NH4The molded cation resin is deposited at the bottom of the solution; conversion of anionic resins of various ionic forms in spent mixed resins to SO4Type negative resin, floating on the upper part of the solution, NH4Type cation resin and SO4Separating the form anion resin, then separating NH4Transferring the molded cation resin to cation resin regeneration column, and diluting with diluted (NH)4)2SO4After the solution is leached until the water is free of Cu, the solution is washed by desalted water until the water is free of SO4 2-Ions, i.e. obtaining fully regenerated NH4Molding a cation resin, adding SO4Transferring the type anion resin to an anion resin regeneration column, and regenerating by using a sodium hydroxide solution as a regenerant according to a conventional method.
2. The method for separating and regenerating the cold water mixed ion exchange resin in the generator set as claimed in claim 1, wherein the method comprisesIs characterized in that: separating NH4The molded cation resin is transformed again by hydrochloric acid or sodium chloride solution, and is transformed into H-type or Na-type resin respectively according to the conventional treatment method, and the transformed cation resin is used as cation exchange resin for the micro-alkalization treatment of cold water in the generator.
3. The method for separating and regenerating the cold water mixed ion exchange resin in the generator as claimed in claim 1, wherein: regenerated NH4The cation resin is used as cation exchange resin for the slightly alkalization treatment of cold water in the generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101683015A CN101234799A (en) | 2007-11-09 | 2007-11-09 | Separating and regeneration method adapted for electric generator inner cooling water mixture iron exchange resin |
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| CNA2007101683015A CN101234799A (en) | 2007-11-09 | 2007-11-09 | Separating and regeneration method adapted for electric generator inner cooling water mixture iron exchange resin |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353191B (en) * | 2008-09-05 | 2010-06-02 | 武汉大学 | Recirculated cooling water nanofiltration ion exchange softening micro-basification method |
| CN104043487A (en) * | 2013-03-11 | 2014-09-17 | 卡特韦尔（天津）科技有限公司 | Regeneration method of ammonium ion exchange material |
| CN111905445A (en) * | 2020-08-21 | 2020-11-10 | 四川省宜宾惠美线业有限责任公司 | Method for separating mixed lipid of anion resin and cation resin |
| CN112485169A (en) * | 2020-11-05 | 2021-03-12 | 西安热工研究院有限公司 | Method for improving resin identification effect in separation tower |
| CN113024696A (en) * | 2021-03-10 | 2021-06-25 | 上海核工程研究设计院有限公司 | Method for preparing strong-acid sodium type resin |
-
2007
- 2007-11-09 CN CNA2007101683015A patent/CN101234799A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353191B (en) * | 2008-09-05 | 2010-06-02 | 武汉大学 | Recirculated cooling water nanofiltration ion exchange softening micro-basification method |
| CN104043487A (en) * | 2013-03-11 | 2014-09-17 | 卡特韦尔（天津）科技有限公司 | Regeneration method of ammonium ion exchange material |
| CN111905445A (en) * | 2020-08-21 | 2020-11-10 | 四川省宜宾惠美线业有限责任公司 | Method for separating mixed lipid of anion resin and cation resin |
| CN112485169A (en) * | 2020-11-05 | 2021-03-12 | 西安热工研究院有限公司 | Method for improving resin identification effect in separation tower |
| CN113024696A (en) * | 2021-03-10 | 2021-06-25 | 上海核工程研究设计院有限公司 | Method for preparing strong-acid sodium type resin |
| CN113024696B (en) * | 2021-03-10 | 2022-12-02 | 上海核工程研究设计院有限公司 | Method for preparing strong-acid sodium type resin |
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