CN114349119A - Application of cation resin and anion resin with same particle size in condensate polishing mixed bed - Google Patents
Application of cation resin and anion resin with same particle size in condensate polishing mixed bed Download PDFInfo
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- CN114349119A CN114349119A CN202111538527.6A CN202111538527A CN114349119A CN 114349119 A CN114349119 A CN 114349119A CN 202111538527 A CN202111538527 A CN 202111538527A CN 114349119 A CN114349119 A CN 114349119A
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- resin
- mixed bed
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- reduced
- anion
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- 239000011347 resin Substances 0.000 title claims abstract description 106
- 229920005989 resin Polymers 0.000 title claims abstract description 106
- 239000002245 particle Substances 0.000 title claims abstract description 41
- 150000001450 anions Chemical class 0.000 title claims abstract description 23
- 150000001768 cations Chemical class 0.000 title claims abstract description 23
- 238000005498 polishing Methods 0.000 title claims abstract description 12
- 125000000129 anionic group Chemical group 0.000 claims description 5
- 125000002091 cationic group Chemical group 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 3
- 238000005325 percolation Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000013589 supplement Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 5
- 238000011001 backwashing Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000011045 prefiltration Methods 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- -1 suspended matters Substances 0.000 description 1
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- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention provides application of cation resin and anion resin with the same particle size in a condensate polishing mixed bed. The homogeneous cation resin and anion resin with the same particle size are used for the high-speed mixed bed for condensate polishing, the operation pressure drop of the resin layer of the whole mixed bed is reduced on the premise of ensuring high separation degree and good mixing effect, the bearing pressure of the resin is reduced, the breakage rate is low, and the problem of poor operation effect of the high-speed mixed bed caused by the increase of the operation resistance is reduced. The invention reduces the breakage rate of the condensate polishing mixed bed by adopting the cation resin and the anion resin with the same particle size and uniform particle size. Compared with the conventional uniform particle mixed resin, the resin crushing rate of the condensed water fine treatment mixed bed is reduced by 5 percent under the comparison condition of one year of actual operation, the annual supplement rate of the resin is reduced, and good economic benefit is generated.
Description
Technical Field
The invention relates to the technical field of condensate polishing, in particular to application of cation resin and anion resin with the same particle size in a condensate polishing mixed bed.
Background
The condensate fine treatment system adopts a medium-pressure condensate mixed bed system, and particularly adopts the series operation of a pre-filter and a high-speed mixed bed. The high-speed mixing bed mainly removes salt (various cations and anions) in the condensed water and can also remove impurities such as suspended matters, colloids and the like leaked from the prefilter. The mixed bed is filled with mixed resin of strong acid cation resin and strong base anion resin, cations in the condensed water are removed by reaction with the cation resin, and anions are removed by reaction with the anion resin. The operation flow rate of the condensate fine treatment high-speed mixing bed is as high as 120m/h, and the effluent quality is required to be high, so that an in-vitro regeneration method is adopted.
Most of domestic electric power system condensate fine treatment resins are made of foreign brands, the average particle size of the cation resin is 0.55 +/-0.05 mm, the average particle size of the anion resin is 0.65 +/-0.05 mm, and the particle size range of the mixed bed resin formed in the way is 0.50-0.70 mm. The narrower the particle size range of the resin, the smaller the running resistance, the lower the pressure drop to the resin, and the lower the resin breakage rate. For a high-speed mixed bed for condensate fine treatment, resin loss can be caused by resin crushing, the separation effect of positive resin and negative resin is poor, and finally the problems of poor effluent quality, reduction of periodic water production and the like are caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides application of cation resin and anion resin with the same particle size in a condensate polishing mixed bed.
In order to achieve the purpose, the invention adopts the technical scheme that:
provides the application of the cation resin and the anion resin with the same grain diameter in a condensate polishing mixed bed.
Further, the average particle diameter of the homogeneous cation resin is 0.65 plus or minus 0.05mm, the average particle diameter of the homogeneous anion resin is 0.65 plus or minus 0.05mm, and the particle size range of the whole mixed bed resin is narrower when the uniformity coefficient is less than 1.1.
Furthermore, the penetration and grinding sphericity of the homogeneous cationic resin and the homogeneous anionic resin is more than 95%, and the average crushing strength is more than 500 g/granule. The volume expansion and contraction are converted during conveying, mixing and scrubbing, regeneration and failure, and the resin cannot be broken due to the reduction of the mechanical strength in the using process.
Further, the wet density difference of the cation resin and the anion resin is 0.2g/ml, so that the mixed bed resin is subjected to backwashing layering and then is separated by more than 99 percent after the operation is failed.
In the invention, the cation resin and anion resin have high exchange capacity, and play a role in high work exchange capacity during operation, thus the periodic water production is high.
In the invention, the uniform particle positive resin and the uniform particle negative resin with the same particle size can keep good mixing effect.
In the invention, the particle size range of the mixed bed resin formed by the particle size-equalizing cation resin and the particle size-equalizing anion resin is narrower, the pressure drop of the running bed layer is small, and the resin breakage rate is reduced.
According to the invention, the resin has uniform porosity after filling, the ion diffusion speed is high, the exchange speed is improved, and the effluent quality is better during operation.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
the homogeneous cation resin and anion resin with the same particle size are used for the high-speed mixed bed for condensate polishing, the operation pressure drop of the resin layer of the whole mixed bed is reduced on the premise of ensuring high separation degree and good mixing effect, the bearing pressure of the resin is reduced, the breakage rate is low, and the problem of poor operation effect of the high-speed mixed bed caused by the increase of the operation resistance is reduced.
The invention reduces the breakage rate of the condensate polishing mixed bed by adopting the cation resin and the anion resin with the same particle size and uniform particle size. Compared with the conventional uniform particle mixed resin, the resin crushing rate of the condensed water fine treatment mixed bed is reduced by 5 percent under the comparison condition of one year of actual operation, the annual supplement rate of the resin is reduced, and good economic benefit is generated.
Drawings
FIG. 1 is a curve showing the pressure drop comparison of the operation of the high-speed mixed-bed homogeneous resin.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention provides application of cation resin and anion resin with the same particle size in a condensate fine treatment mixed bed, wherein the average particle size of the cation resin is 0.65 +/-0.05 mm, and the average particle size of the anion resin is 0.65 +/-0.05 mm; the penetration and grinding sphericity of the homogeneous cationic resin and the homogeneous anionic resin is more than 95%, and the average crushing strength is more than 500 g/granule; the difference between the wet true densities of the homogemc cation resin and the homogemc anion resin is 0.2 g/ml.
Wherein, the pressure reduction contrast curve of the high-speed mixed bed homogeneous resin operation is shown in figure 1.
Example 1
The diameter of the condensate water treatment resin high-speed mixed bed exchange column is 2200mm, the height of the mixed bed resin is 1000mm, the volume ratio of the positive resin to the negative resin is 1:1, and the hydrogen type mixed bed runs. Under the same operation condition, when the operation flow rate is 80m/h, 3 periods are used, compared with the conventional uniform particle mixed bed resin used originally, the uniform particle positive resin and negative resin mixed bed with the same particle size has the advantages that the periodic water production is improved by 1 percent, and the loss rate of the resin due to crushing and backwashing is reduced by 1 percent.
Example 2
The diameter of the condensate water treatment resin high-speed mixed bed exchange column is 2200mm, the height of the mixed bed resin is 1000mm, the volume ratio of the positive resin to the negative resin is 1:1, and the hydrogen type mixed bed runs. Under the same operation condition, when the operation flow rate is 100m/h, 3 cycles are used, compared with the prior conventional uniform particle mixed bed resin, the uniform particle positive resin and negative resin mixed bed with the same particle size has the advantages that the periodic water production is improved by 2 percent, and the loss rate of the resin due to crushing and backwashing is reduced by 1 percent.
Example 3
The diameter of the condensate water treatment resin high-speed mixed bed exchange column is 2200mm, the height of the mixed bed resin is 1000mm, the volume ratio of the positive resin to the negative resin is 1:1, and the hydrogen type mixed bed runs. Under the same operation condition, when the operation flow rate is 120m/h, 3 cycles are used, compared with the prior conventional uniform particle mixed bed resin, the uniform particle positive resin and negative resin mixed bed with the same particle size has the advantages that the periodic water production is improved by 1 percent, and the loss rate of the resin due to crushing and backwashing is reduced by 3 percent.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. The application of cation resin and anion resin with the same particle size in the condensate polishing mixed bed.
2. The use according to claim 1, wherein the average particle size of the homogeneous cationic resin is 0.65 ± 0.05mm, and the average particle size of the homogeneous anionic resin is 0.65 ± 0.05 mm.
3. The use according to claim 1, wherein the spherical percolation rate of the homogeneous cationic resin and the homogeneous anionic resin is greater than 95%, and the average crushing strength is greater than 500 g/granule.
4. The use according to claim 1, wherein the difference between the wet true densities of the homogemc cationic resin and the homogemc anionic resin is 0.2 g/ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538527.6A CN114349119A (en) | 2021-12-15 | 2021-12-15 | Application of cation resin and anion resin with same particle size in condensate polishing mixed bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538527.6A CN114349119A (en) | 2021-12-15 | 2021-12-15 | Application of cation resin and anion resin with same particle size in condensate polishing mixed bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114349119A true CN114349119A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111538527.6A Pending CN114349119A (en) | 2021-12-15 | 2021-12-15 | Application of cation resin and anion resin with same particle size in condensate polishing mixed bed |
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|---|---|
| CN (1) | CN114349119A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2542655Y (en) * | 2002-04-23 | 2003-04-02 | 沈建华 | Cation and anion exchange resin for mixing bed |
| JP2007064646A (en) * | 2005-08-29 | 2007-03-15 | Ebara Corp | Method and device for desalting condensate |
| CN102557190A (en) * | 2012-02-23 | 2012-07-11 | 宁波争光树脂有限公司 | Mixed-bed resin for polishing condensate of compatible supercritical unit |
| CN110354917A (en) * | 2018-04-09 | 2019-10-22 | 南京科技职业学院 | A kind of device of mixed-bed resin regeneration layering |
-
2021
- 2021-12-15 CN CN202111538527.6A patent/CN114349119A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2542655Y (en) * | 2002-04-23 | 2003-04-02 | 沈建华 | Cation and anion exchange resin for mixing bed |
| JP2007064646A (en) * | 2005-08-29 | 2007-03-15 | Ebara Corp | Method and device for desalting condensate |
| CN102557190A (en) * | 2012-02-23 | 2012-07-11 | 宁波争光树脂有限公司 | Mixed-bed resin for polishing condensate of compatible supercritical unit |
| CN110354917A (en) * | 2018-04-09 | 2019-10-22 | 南京科技职业学院 | A kind of device of mixed-bed resin regeneration layering |
Non-Patent Citations (3)
| Title |
|---|
| 孙振海;徐斌;: "反常规均粒混床专用树脂的工业应用", 水处理技术, vol. 1, no. 12, pages 251 - 252 * |
| 张澄信,宋敬霞: "凝结水处理混床树脂均匀混合的重要性", 华北电力技术, no. 04, pages 79 - 82 * |
| 胡久青;孟健健;徐斌;: "国产凝结水精处理用均粒高温树脂的研究及应用", 广东化工, no. 22, pages 19 - 21 * |
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Application publication date: 20220415 |