CN115945230B - Online cleaning device and online cleaning method for ion exchange column - Google Patents
Online cleaning device and online cleaning method for ion exchange column Download PDFInfo
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- CN115945230B CN115945230B CN202310059623.5A CN202310059623A CN115945230B CN 115945230 B CN115945230 B CN 115945230B CN 202310059623 A CN202310059623 A CN 202310059623A CN 115945230 B CN115945230 B CN 115945230B
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- 238000005342 ion exchange Methods 0.000 title claims abstract description 128
- 238000004140 cleaning Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000011347 resin Substances 0.000 claims abstract description 119
- 229920005989 resin Polymers 0.000 claims abstract description 119
- 239000000463 material Substances 0.000 claims abstract description 79
- 239000002245 particle Substances 0.000 claims abstract description 55
- 230000009471 action Effects 0.000 claims abstract description 22
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 238000011010 flushing procedure Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 17
- 239000007863 gel particle Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 11
- 239000011152 fibreglass Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000000084 colloidal system Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 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 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses an online cleaning device and an online cleaning method for an ion exchange column, and belongs to the technical field of application of ion exchange columns. The online cleaning device comprises an ion exchange column, a negative pressure material lifting tank, a vacuum negative pressure pump and air compression equipment, wherein a material lifting pipe penetrating through the inner side and the outer side of the ion exchange column is arranged on the upper portion of the ion exchange column, the outer side end of the material lifting pipe is communicated with the lower portion of the negative pressure material lifting tank through a guide pipe, the upper portion of the negative pressure material lifting tank is communicated with the vacuum negative pressure pump and the air compression equipment, negative pressure and positive pressure inside the negative pressure material lifting tank are alternately formed, resin in the ion exchange column is conveniently sucked and spitted, stirring of resin particles in the ion exchange column is achieved, and further effective flushing of the surfaces of the stirred resin particles is achieved. The invention realizes the sucking and spitting action of the resin in the ion exchange column by utilizing the vacuum drainage negative pressure material extracting method, simply and conveniently realizes the resin stirring, provides favorable conditions for the online flushing of the resin particles, can also realize the colloid removal optimization of the resin particles, and improves the online cleaning effect.
Description
Technical Field
The invention relates to the technical field of ion exchange column application, in particular to an online cleaning device and an online cleaning method for an ion exchange column.
Background
The preparation of silica sol generally takes sodium silicate as a raw material, sodium ions are removed by an ion exchange technology after dissolution and dilution to obtain silicic acid and polymers thereof, and then particle stabilization is carried out by a hydrothermal synthesis method. In the ion exchange process, silicic acid is unstable due to pH change, gel is formed and coated on the surfaces of ion exchange resin particles, and the exchange effect is affected, so that the resin generally needs to be washed immediately after the exchange. These gel particles are very fine, and if the water washing is insufficient and thorough, they will be mixed into silicic acid during the next exchange process, affecting the quality of the silica sol.
In order to solve the above problems, some manufacturers add stirring devices to design ion exchange columns so as to separate and remove the generated gel from the exchange resin particles by water washing. Although this design can ameliorate the effects of gelation problems, the equipment is not well closed, belonging to open columns. The open column body can bring the overflow of regenerated acid gas, pollute the working environment, and easily enable impurities in the air to enter the column body to pollute materials. The stirring device is inconvenient to maintain, the materials such as greasy dirt and the like are easy to pollute, the maintenance workload is large, and the resin is inconvenient to wash and transfer. If a centrifugal pump is used for pumping, resin particles are easily crushed, and the production requirement cannot be met.
It is seen that the cleaning of the resin particles of the conventional ion exchange column is still inconvenient and disadvantageous, and further improvement is needed. How to create a new online cleaning device and online cleaning method for ion exchange columns, which can simply and conveniently meet the requirements of resin transfer, resin cleaning and resin particle glue removal, achieve the technical effects of avoiding resin particle breakage, easy glue removal and thorough cleaning, and become the aim of urgent need of improvement in the current industry.
Disclosure of Invention
The invention aims to solve the technical problem of providing an on-line cleaning device for an ion exchange column, which is simple and convenient to meet the requirements of resin transfer, resin particle cleaning and resin particle photoresist removal, and achieves the technical effects of avoiding resin particle breakage, easy photoresist removal and thorough cleaning, thereby overcoming the defects of the existing ion exchange column in resin particle cleaning.
In order to solve the technical problems, the invention provides an online cleaning device for an ion exchange column, wherein a medium inlet and a medium outlet are respectively arranged at the upper part and the lower part of the ion exchange column, a flower plate is arranged at the lower side of the inside of the ion exchange column, the upper part of the flower plate is used for filling resin, the online cleaning device also comprises a negative pressure lifting tank, a vacuum negative pressure pump and air compression equipment which are connected with the negative pressure lifting tank, a lifting pipe penetrating through the inner side and the outer side of the ion exchange column is arranged at the upper part of the ion exchange column, the inner side end of the lifting pipe extends to the vicinity of the upper part of the flower plate, the outer side end of the lifting pipe is communicated with the lower part of the negative pressure lifting tank through a conduit, the upper part of the negative pressure lifting tank is communicated with the vacuum negative pressure pump and is used for forming negative pressure inside the negative pressure lifting tank, the resin inside the negative pressure lifting tank is conveniently pressed into the ion exchange column again, and the ion exchange column is stirred for particles in the ion exchange column, and the medium inlet and the medium outlet of the ion exchange column are stirred on line.
Further improved, the negative pressure material lifting tank adopts a tank body made of glass fiber reinforced plastic, a reinforcing ring fixedly connected with the tank body is arranged on the outer side of the tank body, and a breathing tube opening is arranged on the upper portion of the ion exchange column.
Further improved, the upper part of the negative pressure lifting tank is also provided with a flushing water inlet, a pressure gauge and an observation window, and the upper side and the lower side of the inside of the negative pressure lifting tank are respectively provided with an upper liquid level gauge and a lower liquid level gauge.
The improved cyclone separator is characterized by further comprising a cyclone separator, wherein a tangential inlet of the cyclone separator is communicated with a conduit at the lower part of the negative pressure feed tank, a lower outlet of the cyclone separator is communicated with the upper part of the ion exchange column, an upper overflow port of the cyclone separator is used for discharging fine gel particles and broken resin particles in the resin particles, and regulating valves are arranged on pipelines connected with the tangential inlet, the lower outlet and the upper overflow port of the cyclone separator.
Further improved, the guide pipe at the lower part of the negative pressure material lifting tank is also connected with a resin transfer-out pipe, and the side, close to the material lifting pipe, of the guide pipe is provided with a regulating valve.
Further improvement, the regulating valve adopts an electromagnetic valve or a manual regulating valve.
Further improved, the vacuum negative pressure pump is composed of one or two water ring type vacuum pumps.
As a further improvement of the present invention, the present invention also provides an online cleaning method for an ion exchange column, where the method is implemented by using the online cleaning device for an ion exchange column, and the method includes three cleaning modes:
the first is a stripping gel breaking mode: the negative pressure material extracting tank is used for forming negative pressure in the negative pressure material extracting tank under the action of the vacuum negative pressure pump, and resin in the ion exchange column is sucked into the negative pressure material extracting tank in a vacuum drainage negative pressure material extracting mode; then under the action of the air compression equipment, positive pressure is formed in the negative pressure material extracting tank, resin in the negative pressure material extracting tank is re-spitted into the ion exchange column, stirring of resin particles in the ion exchange column is formed, one cycle of suction and spitting is completed, and after the set times are reached, automatic flushing is completed through a medium inlet and a medium outlet of the ion exchange column;
the second is a material lifting cyclone glue removing mode: the negative pressure material extracting tank is used for forming negative pressure in the negative pressure material extracting tank under the action of the vacuum negative pressure pump, and resin in the ion exchange column is sucked into the negative pressure material extracting tank in a vacuum drainage negative pressure material extracting mode; then under the action of the air compression equipment, positive pressure is formed in the negative pressure material tank, resin in the negative pressure material tank is re-spitted into the ion exchange column through the hydrocyclone, stirring of resin particles in the ion exchange column is formed, fine gel particles and broken resin particles on the surfaces of the resin particles are removed, one cycle of suction and spitting is completed, and automatic flushing is completed through a medium inlet and a medium outlet of the ion exchange column after set times are reached;
the third is resin roll-out mode: the negative pressure material extracting tank is used for forming negative pressure in the negative pressure material extracting tank under the action of the vacuum negative pressure pump, and resin in the ion exchange column is sucked into the negative pressure material extracting tank in a vacuum drainage negative pressure material extracting mode; and then under the action of the air compression equipment, positive pressure is formed in the negative pressure material tank, resin in the negative pressure material tank is turned out through the resin transfer-out pipe, and the resin in the ion exchange column is turned out until the resin in the ion exchange column is completely turned out.
As another improvement of the invention, the invention also provides an online cleaning method of the ion exchange column, which adopts a vacuum drainage negative pressure material lifting method to suck and spit resin in the ion exchange column, so as to stir resin particles in the ion exchange column, and then realize online flushing of the stirred resin particles.
Further improved, the separation of the fine gel ions and broken resin particles in the resin particles is realized by a hydrocyclone in the process of spitting back the resin to the ion exchange column.
With such a design, the invention has at least the following advantages:
1. the on-line cleaning device for the ion exchange column provided by the invention has the advantages that through the arrangement of the negative pressure material lifting tank and the utilization of the vacuum negative pressure pump and the air compression equipment, the negative pressure and positive pressure states of the negative pressure material lifting tank are formed, the suction and the discharge actions of resin in the ion exchange column are realized through the vacuum drainage negative pressure material lifting method, the stirring of resin particles in the ion exchange column is realized simply and conveniently, the breakage of the resin particles can be avoided as much as possible, the beneficial condition is provided for on-line flushing of the resin particles, the problems that the maintenance workload is large, the maintenance is difficult and the pollution is easy to bring due to the arrangement of the stirring equipment in the existing ion exchange column are overcome, the cleaning effect of the on-line cleaning device is excellent, and the on-line cleaning device belongs to a closed ion exchange column, and the pollution can be prevented.
2. And by arranging the hydrocyclone, the fine gel particles and broken resin particles on the surfaces of the resin particles can be removed in the resin suction and discharge process, so that the gel removal optimization of the resin is realized, and the online cleaning effect is further improved.
3. And the resin transfer tube is arranged, so that the resin can be transferred in a nondestructive manner by using a vacuum negative pressure material lifting method, and the resin transfer tube is simple, convenient, safe and reliable.
4. The internal pressure of the ion exchange column is not changed along with the internal positive pressure and the negative pressure of the negative pressure material extracting tank by setting the breathing through pipe orifice, so that the consistency of the internal pressure and the external pressure of the ion exchange column is maintained, and the use safety of the ion exchange column is ensured.
5. According to the online cleaning method, resin in the ion exchange column is sucked and spitted by using a vacuum drainage negative pressure material extracting method, stirring of the resin in the ion exchange column is formed, separation of micro gel ions and broken resin particles in the resin is realized through a hydrocyclone in the process of spitting the resin back to the ion exchange column, the cleaning effect is obvious, the automation degree is high, the manual investment and the production operation difficulty are greatly saved, the safety is high, and the water saving effect is obvious.
Drawings
The foregoing is merely an overview of the present invention, and the present invention is further described in detail below with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of an on-line cleaning apparatus for ion exchange columns according to the present invention.
Fig. 2 is a schematic structural view of a negative pressure feed tank in the on-line cleaning apparatus for ion exchange columns according to the present invention.
FIG. 3 is a schematic diagram of the structure of a hydrocyclone in the on-line cleaning apparatus for ion exchange columns of the present invention.
In the figure, 1. An ion exchange column; 10. a support structure; 11. a lifting pipe; 12. a flower plate; 13. a media inlet; 14. a medium outlet; 15. a water cap; 16. a side manhole and a sight glass; 17. a breathing tube opening; 2. a negative pressure material lifting tank; 21. a reinforcing ring; 22. an observation window; 23. a pressure gauge; 24. an upper level gauge; 25. a lower level gauge; 26. a tap water flushing inlet; 3. a vacuum negative pressure pump station; 4. an air compression device; 5. a hydrocyclone; 51. a tangential inlet; 52. a lower outlet; 53. an upper overflow port; 6. a conduit; 7. a resin transfer tube; 8. a catheter.
Detailed Description
Referring to fig. 1, the on-line cleaning device for an ion exchange column of the present embodiment comprises an ion exchange column 1, wherein a medium inlet 13 and a medium outlet 14 are respectively arranged at the upper part and the lower part of the ion exchange column 1. The inside downside of ion exchange column 1 is equipped with the card 12, be equipped with the water cap 15 on the card, the card top is used for filling resin.
The embodiment also comprises a negative pressure feed tank 2, a vacuum negative pressure pump 3 and an air compression device 4 which are connected with the negative pressure feed tank. The upper portion of the ion exchange column 1 is provided with a lifting pipe 11 penetrating through the inner side and the outer side of the ion exchange column 1, the inner side end of the lifting pipe 11 extends to the vicinity of the upper portion of the flower plate 12, and the outer side end of the lifting pipe 11 is communicated with the lower portion of the negative pressure lifting tank 2 through a guide pipe 6. The upper portion of negative pressure feed tank 2 be equipped with the first through-hole of vacuum negative pressure pump 3 intercommunication is used for forming negative pressure feed tank 2 inside negative pressure, the vacuum drainage of being convenient for resin in the ion exchange column 1, the upper portion of negative pressure feed tank 2 still be equipped with the second through-hole of air compression equipment 4 intercommunication is used for forming the inside malleation of negative pressure feed tank 2, be convenient for with its inside resin repress in the ion exchange column 1 reaches to the stirring of resin granule in the ion exchange column 1. Of course, the first through hole and the second through hole can also be matched with the opening and closing of the valve through a three-way pipe to realize the communication between the negative pressure material lifting tank 2 and the vacuum negative pressure pump 3 or the air compression device 4. The medium inlet 13 and the medium outlet 14 of the ion exchange column 1 are used for realizing online flushing of the stirred resin particles in the ion exchange column 1.
Specifically, in this embodiment, the ion exchange column 1 is a closed glass fiber reinforced plastic exchange column, the upper and lower parts are respectively provided with a seal head with a manhole, the upper part of the side wall of the seal head is provided with a side manhole and a sight glass 16, and the support of the ion exchange column 1 is realized through the support structure 10. The pattern plate 12 is provided with water caps 15 in regular triangle arrangement, and the specification of the water caps is one inch. The flower plate 12 is fixed on the inner wall of the exchange column by upper and lower flange rings. The middle straight cylinder of the exchange column has the size of 1600mm in diameter and 2000mm in height. The lifting pipe 11 is a PVC pipe with DN80-DN100, the inner side end of the lifting pipe is positioned at 100mm above the water cap 15, and the outer side end of the lifting pipe is fixedly connected with the guide pipe 6 through a flange.
And the upper part of the ion exchange column 1 is also provided with a breathing tube port 17 for keeping the consistency of the internal pressure and the external pressure of the ion exchange column 1, so that the internal pressure of the ion exchange column 1 does not change along with the positive pressure and the negative pressure in the negative pressure feed tank 2, and the use safety of the ion exchange column 1 is ensured.
Referring to FIG. 2, the negative pressure tank 2 in this embodiment is a tank body made of glass fiber reinforced plastic, and has a volume of about 0.176m 3 Because of the need of alternately bearing the load of positive and negative pressure and the fluctuation range of the pressure from minus 0.098Mpa to plus 0.2Mpa, two additional pipes fixedly connected with the tank body are arranged outside the tank bodyThe strong ring 21 improves the service life thereof.
The upper portion of negative pressure feed tank 2 still is equipped with washes water inlet 26, manometer 23 and observation window 22, the inside upside down side of negative pressure feed tank 2 is equipped with upper portion level gauge 24 and lower part level gauge 25 respectively for the material volume and the material number of times of carrying of control resin.
In this embodiment, the vacuum negative pressure pump 3 is composed of a vacuum negative pressure pump station composed of one or two water ring type vacuum pumps, and comprises a vacuum tank for serving as a vacuum storage device. The vacuum negative pressure pump station, such as HJZF series vacuum pump station, can save energy greatly and prolong the service life of the vacuum pump for the occasion that the vacuum source is frequently used and the required pumping quantity is not too large. The technological requirements of the vacuum negative pressure pump are as follows: vacuum degree is 0 to minus 0.09Mpa, and vacuum tank volume is 0.5m 3 The model of the vacuum pump station is ZF-0.5A, the water ring type vacuum pump is 2BV2061 multiplied by 2, the power is 1.5kW multiplied by 2, the fluctuation range of the vacuum degree is 0 to minus 0.09Mpa, and the interface caliber is 50mm. The air compression device 4 adopts the existing commercial equipment and can achieve positive pressure in the negative pressure material lifting tank.
In this embodiment, the negative pressure provided by the vacuum negative pressure pump station is-0.09 Mpa, and the theoretical water column supported by the negative pressure is 9m, so the installation height of the negative pressure material lifting tank 2 is limited. In actual installation, the plane of the lower pattern plate 12 of the exchange column is taken as a zero point H 0 The top flange opening of the negative pressure material feeding tank 2 is taken as the maximum height H MAX . Time of installation (H 0 -H MAX The height of the pipe is reasonably controlled, the pipeline path is shortened as much as possible according to the field conditions, and the number of elbows is reduced. In the cleaning and transferring processes, the resin and the water are in a mixed suspension state, and the resin particles are extremely similar to the water in terms of water. The system calculates the head loss H according to the water system Damage to (10 m long pipe estimated according to 1m head loss, one elbow estimated according to loss 0.5 m.) finally satisfies the judgement condition of whether to suck: h MAX +H Damage to ≤9m。
Further improved, referring to fig. 3, the on-line cleaning device for an ion exchange column of this embodiment further includes a hydrocyclone 5, a tangential inlet 51 of the hydrocyclone 5 is communicated with a conduit 6 at the lower part of the negative pressure feed tank 2 through a conduit 8, a lower outlet 52 of the hydrocyclone 5 is communicated with the upper part of the ion exchange column 1, an upper overflow port 53 of the hydrocyclone 5 is used for discharging fine gel particles and broken resin particles in the resin, and regulating valves are arranged on pipes connected with the tangential inlet 51, the lower outlet 52 and the upper overflow port 53 of the hydrocyclone 5, and are used for controlling on-off of the hydrocyclone 5.
Specifically, in this embodiment, the structure of the hydrocyclone 5 is similar to that of the conventional hydrocyclone, the upper part is a cylindrical part, the lower part is a conical part, the feed liquid enters from the tangential inlet 51 of the cylindrical part in a tangential direction, and the feed liquid rotates to generate centrifugal force, so that the conical part descending to the lower part rotates more severely. So that the fine gel particles or the liquid with higher density in the feed liquid are thrown to the wall under the action of centrifugal force and flow down to the lower outlet 52 along the wall in a spiral line to enter the ion exchange column 1; and the clarified liquid or fine gel particles and broken resin particles carried in the liquid rise and overflow from the upper overflow port 53 at the center, thereby completing the removal of the fine gel particles and broken resin particles on the surface of the resin particles. The hydrocyclone has simple structure, small volume, high production efficiency, and wide range of separated gel particles, such as treatment capacity of 10-15m when working pressure of hydrocyclone with diameter of 150mm is 0.2MPa 3 And/h, under normal operating conditions, can remove 50% of gel particles of about 40 μm and 95% of gel particles of about 15 μm, and can simultaneously remove fine light-weight gel particles of less than about 12 μm.
In this embodiment, the conduit 6 at the lower part of the negative pressure feed tank 2 is further connected with a resin transfer tube 7, and the side of the resin transfer tube 7 and the side of the conduit 6, which is close to the feed pipe 11, are respectively provided with a regulating valve, so as to realize the split control of resin transfer.
In this embodiment, the regulating valves may all adopt solenoid valves, so as to promote automatic control. Of course, the regulating valve can also adopt a manual regulating valve to realize manual control.
Because the ion exchange column 1 is contacted with acid-base medium, the tank body, the pipeline, the manual valve, the electromagnetic valve and the liquid level meter in the device are all made of corrosion-resistant materials, such as glass fiber reinforced plastic and PVC pipe. The cyclone liquid separator is difficult to process and easy to wear, so that the cyclone liquid separator is processed by adopting 316L stainless steel plates.
The online cleaning device for the ion exchange column is used for realizing online cleaning of the ion exchange column, and the online cleaning method comprises three cleaning modes:
the first is a stripping gel breaking mode:the negative pressure material extracting tank 2 forms negative pressure in the ion exchange column 1 under the action of the vacuum negative pressure pump 3, and resin in the ion exchange column 1 is sucked into the negative pressure material extracting tank 2 in a vacuum drainage negative pressure material extracting mode; then under the action of the air compression device 4, positive pressure is formed in the negative pressure feed tank 2, resin in the negative pressure feed tank is re-spitted into the ion exchange column 1, stirring of resin particles in the ion exchange column 1 is formed, one period is completed by the suction and spitting, the period time is controlled by the upper liquid level meter 24 and the lower liquid level meter 25, and after the set number of times is reached, on-line automatic flushing of the resin particles is completed through the medium inlet 13 and the medium outlet 14 of the ion exchange column 1.
The second is a material lifting cyclone glue removing mode: the method comprises the steps of an ion exchange column, a negative pressure material extracting tank, a hydrocyclone, an ion exchange column, namely, the negative pressure material extracting tank 2 forms negative pressure inside the negative pressure material extracting tank under the action of a vacuum negative pressure pump 3, and resin inside the ion exchange column 1 is sucked into the negative pressure material extracting tank 2 in a vacuum drainage negative pressure material extracting mode; then under the action of the air compression device 4, positive pressure is formed in the negative pressure feed tank 2, resin in the negative pressure feed tank is re-spitted into the ion exchange column 1 through the hydrocyclone 5, stirring of resin particles in the ion exchange column 1 is formed, fine gel particles and broken resin particles on the surfaces of the resin particles are removed, one cycle of suction and spitting is completed, cycle time is controlled by the upper liquid level meter 24 and the lower liquid level meter 25, and automatic flushing is completed through the medium inlet 13 and the medium outlet 14 of the ion exchange column 1 after the set times are reached.
The third is resin roll-out mode: the method comprises the steps of an ion exchange column, a negative pressure material extracting tank and a target tank, wherein the negative pressure material extracting tank 2 forms negative pressure in the ion exchange column under the action of a vacuum negative pressure pump 3, and resin in the ion exchange column 1 is sucked into the negative pressure material extracting tank 1 in a vacuum drainage negative pressure material extracting mode; then, under the action of the air compression device 4, positive pressure is formed inside the negative pressure feed tank 2, and resin inside the negative pressure feed tank is turned out through the resin transfer-out pipe 7 to form a turn-out of the resin in the ion exchange column 1 until the resin in the ion exchange column 1 is completely turned out.
The online cleaning method of the ion exchange column can switch different cleaning modes according to different requirements, achieves different cleaning purposes, and has the advantages of simple and convenient integral device, safe and reliable method and excellent cleaning effect.
The online cleaning method of the ion exchange column can realize the sucking and spitting action of the resin in the ion exchange column by utilizing a vacuum drainage negative pressure material extracting method, simply and conveniently realize the stirring of the resin particles in the ion exchange column, provide favorable conditions for online flushing of the resin particles, and ensure the use safety of the ion exchange column. The setting of hydro-cyclone separator in the process of inhaling and spitting can realize the removal of fine gel particles and broken resin particles on the surface of the resin particles, and the removal of the resin particles is optimized, so that the online cleaning effect is further improved, and the problems that the resin particles are broken, the maintenance workload is large, the maintenance is difficult and the maintenance is easy to bring pollution due to the setting of stirring equipment in the existing exchange column are solved. The online cleaning method has the advantages of excellent cleaning effect and high automation degree, greatly saves the labor investment and the production operation difficulty, and can prevent pollution and the occurrence of polluted ion exchange columns.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, and some simple modifications, equivalent variations or modifications can be made by those skilled in the art using the teachings disclosed herein, which fall within the scope of the present invention.
Claims (7)
1. The on-line cleaning device of the ion exchange column is characterized by further comprising a negative pressure lifting tank, a vacuum negative pressure pump and air compression equipment, wherein the vacuum negative pressure pump and the air compression equipment are connected with the negative pressure lifting tank;
the upper part of the ion exchange column is provided with a breathing tube opening;
the vacuum negative pressure pump is composed of a vacuum negative pressure pump station composed of one or two water ring type vacuum pumps.
2. The on-line cleaning device for ion exchange columns according to claim 1, wherein the negative pressure feed tank is a tank body made of glass fiber reinforced plastic, and a reinforcing ring fixedly connected with the tank body is arranged on the outer side of the tank body.
3. The on-line cleaning device for ion exchange columns according to claim 2, wherein the upper part of the negative pressure feed tank is further provided with a flushing water inlet, a pressure gauge and an observation window, and the upper side and the lower side of the inside of the negative pressure feed tank are respectively provided with an upper liquid level gauge and a lower liquid level gauge.
4. An on-line cleaning apparatus for an ion exchange column according to any one of claims 1 to 3, further comprising a hydrocyclone, wherein a tangential inlet of the hydrocyclone is in communication with a conduit at the lower part of the negative pressure feed tank, a lower outlet of the hydrocyclone is in communication with the upper part of the ion exchange column, and an upper overflow port of the hydrocyclone is used for discharging fine gel particles and broken resin particles in the resin particles, and regulating valves are provided on pipes connected to the tangential inlet, the lower outlet and the upper overflow port of the hydrocyclone.
5. The on-line cleaning apparatus for ion exchange columns according to claim 4, wherein a resin transfer tube is further connected to a conduit at the lower part of the negative pressure feed tank, and the resin transfer tube and the conduit are provided with a regulating valve at a side close to the feed pipe.
6. The on-line cleaning apparatus for ion exchange columns according to claim 5, wherein the regulating valve is a solenoid valve or a manual regulating valve.
7. An on-line cleaning method for an ion exchange column, which is characterized in that the on-line cleaning device for the ion exchange column according to claim 5 comprises three cleaning modes:
the first is a stripping gel breaking mode: the negative pressure material extracting tank is used for forming negative pressure in the negative pressure material extracting tank under the action of the vacuum negative pressure pump, and resin in the ion exchange column is sucked into the negative pressure material extracting tank in a vacuum drainage negative pressure material extracting mode; then under the action of the air compression equipment, positive pressure is formed in the negative pressure material extracting tank, resin in the negative pressure material extracting tank is re-spitted into the ion exchange column, stirring of resin particles in the ion exchange column is formed, one cycle of suction and spitting is completed, and after the set times are reached, automatic flushing is completed through a medium inlet and a medium outlet of the ion exchange column;
the second is a material lifting cyclone glue removing mode: the negative pressure material extracting tank is used for forming negative pressure in the negative pressure material extracting tank under the action of the vacuum negative pressure pump, and resin in the ion exchange column is sucked into the negative pressure material extracting tank in a vacuum drainage negative pressure material extracting mode; then under the action of the air compression equipment, positive pressure is formed in the negative pressure material tank, resin in the negative pressure material tank is re-spitted into the ion exchange column through the hydrocyclone, stirring of resin particles in the ion exchange column is formed, fine gel particles and broken resin particles on the surfaces of the resin particles are removed, one cycle of suction and spitting is completed, and automatic flushing is completed through a medium inlet and a medium outlet of the ion exchange column after set times are reached;
the third is resin roll-out mode: the negative pressure material extracting tank is used for forming negative pressure in the negative pressure material extracting tank under the action of the vacuum negative pressure pump, and resin in the ion exchange column is sucked into the negative pressure material extracting tank in a vacuum drainage negative pressure material extracting mode; and then under the action of the air compression equipment, positive pressure is formed in the negative pressure material tank, resin in the negative pressure material tank is turned out through the resin transfer-out pipe, and the resin in the ion exchange column is turned out until the resin in the ion exchange column is completely turned out.
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| CN115945230A (en) | 2023-04-11 |
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