CN102126772B - Electroabsorption desalting regeneration system and regeneration method - Google Patents
Electroabsorption desalting regeneration system and regeneration method Download PDFInfo
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- CN102126772B CN102126772B CN201110075134A CN201110075134A CN102126772B CN 102126772 B CN102126772 B CN 102126772B CN 201110075134 A CN201110075134 A CN 201110075134A CN 201110075134 A CN201110075134 A CN 201110075134A CN 102126772 B CN102126772 B CN 102126772B
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Abstract
The invention discloses an electroadsorption desalting regeneration system and an electroadsorption desalting regeneration method, which relate to the field of sewage treatment and are used for solving the problem of a relative poor regeneration effect of an electroadsorption module in the prior art. The system comprises an electroadsorption module to be regenerated, an acid water tank for storing acid liquor, an acid-washing short connected regeneration unit for washing the electroadsorption module by using the acid liquor in the acid water tank, an acid discharging unit for discharging the acid liquor generated after the washing of the acid-washing short connected regeneration unit, a water tank for storing water, a regeneration washing unit for washing the electroadsorption module by using the water stored in the water tank, and a drainage unit for draining the water generated after the washing of the regeneration washing unit. The method comprises the following steps of: performing acid-washing regeneration; discharging the acid liquor; performing regeneration washing; and draining the water. In the invention, an acid-washing regeneration process is added, so that positive ions on a group of the electroadsorption module can be completely displaced to fulfill the aim of complete regeneration.
Description
Technical field
The present invention relates to sewage treatment area, particularly relate to a kind of electro-adsorption demineralization regeneration system rapidly and renovation process.
Background technology
Along with development economic and society, requiring of human on the one hand demand and the quality to water is increasingly high, and on the other hand, the scope and the degree of water pollution are also increasing.
The electro-adsorption demineralization technology is as a kind of water technology, and its total technical process is divided into 3 parts, and workflow, short circuit leave standstill flow process, short circuit regeneration flow process.Workflow is to make electrode of opposite sheet logical positive negative electricity in position in the module, utilizes the potential difference between the electrode slice to adsorb the zwitterion in the former water, reaches the purpose that purifies former water, and at this moment, the pH value is lower near the anodal electrode slice, shows acid; The pH value is higher near the electrode slice of negative pole, shows alkalescence.The water outlet of electro-adsorption module promptly is the product water of electro-adsorption demineralization system in this process; It is with electrode slice positive and negative electrode short circuit that short circuit leaves standstill flow process, because the electromotive force of absorption zwitterion disappears, zwitterion meeting desorption is in module channels; Short circuit regeneration flow process is that water is gone out the electro-adsorption module with desorption in the short circuit process to the whole ions in the passage, makes it to obtain regeneration.
Use existing electro-adsorption system process; Find through secular actual motion, significantly decrease, trace it to its cause with the desalination rate that begins to compare the electro-adsorption module; Along with electrode lengthening duration of service, the surface has produced the acidic-group that has IX in a large number.This kind group has the function of similar IX; That is: electrode slice is placed the lower solution of pH value; The positively charged ion generation permutoid reaction of hydrogen ion ability and the absorption of electrode surface group in the solution, hydrogen ion is adsorbed by electrode slice, and the cation concn of bulk solution raises; Again electrode slice is inserted the pH value in the neutral salts solution, the hydrogen ion of electrode surface group absorption again can with the positively charged ion generation permutoid reaction in the solution, positively charged ion is by the absorption of electrode slice group, the pH value reduction of solution.This behavior shows in the module routine, during work, shows acid because electrode slice is anodal that is:; The pH value is lower, and the positively charged ion that adsorbs on the electrode slice group can be exchanged in the original solution by hydrogen ion, and the cation concn of original solution is raise; Go out water concentration and raise, influence clearance.And in regenerative process, solution is neutral near the electrode slice, and the positively charged ion in the solution can come back on the electrode slice positively charged ion by the exchange of the hydrogen ion on the electrode slice group, influences regeneration effect.Formed the process of adsorbing---desorption---absorption contrary with the electro-adsorption module.Cause electro-adsorption module adsorption efficiency to descend.
Summary of the invention
The present invention provides a kind of electro-adsorption demineralization regeneration system rapidly and renovation process, in order to solve the relatively poor problem of electro-adsorption module regeneration effect of prior art.
System of the present invention comprises: treat regenerated electro-adsorption module; The sour water case is used to store acid solution; Pickling short circuit regeneration unit is used for cleaning above-mentioned electro-adsorption module with the acid solution of sour water case storage; The acid discharge unit is used to discharge the acid solution that after pickling short circuit regeneration unit cleans, is produced; Water tank is used for storage of water; Regeneration flushing unit is used for washing above-mentioned electro-adsorption module with the water of water tank storage; Drainage cell is used to discharge the water that after regeneration flushing unit flushing, is produced.
Further, also comprise: timing unit is used to control the duration that regeneration flushing unit washes above-mentioned electro-adsorption module.
Further, also comprise: acid solution reclaims the unit, is used to reclaim the residue acid solution that discharge the acid discharge unit.
Further, also comprise: water reclaims the unit, is used to reclaim the water that drainage cell is discharged.
Method of the present invention comprises the following steps: pickling regenerated step: the electro-adsorption module of cleaning the electro-adsorption demineralization system with acid solution; The step of acid discharge: discharge the acid solution that is produced through above-mentioned pickling regeneration step; The step of regeneration flushing: the electro-adsorption module of washing said electro-adsorption demineralization system with water; The step of draining: discharge the water that is produced through above-mentioned regeneration rinse step; Wherein, the step of described pickling regenerated step, acid discharge, the step of regeneration flushing and the step of draining adopt above-mentioned electro-adsorption demineralization regeneration system rapidly to implement.
Further, in said regeneration rinse step, the electro-adsorption module of said electro-adsorption demineralization system is washed with preset duration.Further, also comprise the step that reclaims acid solution: reclaim the residue acid solution that said acid discharge step is discharged.Further, the step that also comprises recycle-water: reclaim the water that said drain step is discharged.
Beneficial effect of the present invention is following:
In the existing electro-adsorption module reclaiming process, owing to do not have this process of pickling regeneration, so the positively charged ion that adsorbs on the electro-adsorption module can not cement out fully.The present invention has increased the pickling regenerative process, therefore can the positively charged ion on the group of electro-adsorption module be cemented out fully, reaches thorough regenerated purpose.It is thus clear that the present invention can guarantee the long-term continous-stable operation of electro-adsorption demineralization system.
Description of drawings
Fig. 1 is the system architecture synoptic diagram of the embodiment of the invention;
Fig. 2 is the system architecture synoptic diagram of another embodiment of the present invention;
Fig. 3 is the method steps schema of the embodiment of the invention;
Fig. 4 is the method steps schema of another embodiment of the present invention.
Embodiment
Regeneration effect for the electro-adsorption module that promotes the electro-adsorption demineralization system; (after being the positive and negative electrode short circuit, positive pole is emitted negatively charged ion, and negative pole is emitted positively charged ion after the short circuit process in the prior art; The negative ions of electro-adsorption process absorption is discharged in the bulk solution); The invention provides a kind of embodiment of electro-adsorption demineralization regeneration system rapidly, referring to shown in Figure 1, it comprises:
Treat regenerated electro-adsorption module 101.
Pickling short circuit regeneration unit 103; Be used for acid solution feeding electro-adsorption module 101 with the certain pH value of sour water case 102 storages; Hydrogen ion in the acid solution gets off the cation replacement on the electrode surface group; Make electrode surface group absorption hydrogen ion, the cation concn in the acid solution is raise, reach the purpose of regeneration electro-adsorption module 101 electrodes.
The acid solution that after pickling short circuit regeneration unit 103 cleans, is produced after for some time, is discharged in acid discharge unit 104.
In concrete the realization, can realize pouring into, discharging of acid solution through motor-mount pump or other modes.
It is thus clear that present embodiment has increased sour water case 102, pickling short circuit regeneration unit 103 and acid discharge unit 104 at least with respect to prior art, promptly increased the process of pickling.Therefore, reached the purpose that promotes electro-adsorption module regeneration effect, seen for details above-mentioned.
Further, for the electro-adsorption module of long term operation, two kinds of effects can appear during work.The one, the electro-adsorption effect: former water is through between the positive and negative electrode of electro-adsorption module, and wherein negatively charged ion is adsorbed by positive pole, and positively charged ion is adsorbed by negative pole.This process makes former water desalination, reaches the purification purpose.Because the regeneration effect of electro-adsorption module of the present invention is better, so the desalination rate is high than prior art.Another kind of effect is: hydrogen ion on the positive and negative electrode sheet group of electro-adsorption module and the positively charged ion generation exchange interaction in the former water; Group absorption positively charged ion; Hydrogen ion is displaced to former acidity of water is increased, the basicity neutralization in common meeting of this part acidity of increase and the water.This process can be removed anhydrate middle-jiao yang, function of the spleen and stomach ion and basicity, reaches the purpose of purification.Owing to after the acid cleaning process, attached a large amount of hydrogen ions on the electro-adsorption module electrodes, therefore cationic exchange interaction (promptly adsorbing cationic effect) in above-mentioned hydrogen ion and the former water, and acid-base neutralisation effect all than prior art for well.
To sum up, present embodiment can guarantee the operation of the long-term continous-stable of electro-adsorption demineralization system.
The present invention also provides another embodiment of a kind of electro-adsorption demineralization regeneration system rapidly, referring to shown in Figure 2, comprising:
Treat regenerated electro-adsorption module 201.
Pickling short circuit regeneration unit 203; Be used for acid solution feeding electro-adsorption module 201 with the certain pH value of sour water case 202 storages; Hydrogen ion in the acid solution gets off the cation replacement on the electrode surface group; Make electrode surface group absorption hydrogen ion, the cation concn in the acid solution is raise, reach the purpose of regeneration electro-adsorption module 201 electrodes.
The acid solution that after pickling short circuit regeneration unit 203 cleans, is produced after for some time, is discharged in acid discharge unit 204.
Acid solution reclaims unit 209, is used to reclaim the residue acid solution that discharge acid discharge unit 204.
In concrete the realization, can realize pouring into, discharging of acid solution through motor-mount pump or other modes.Can pass through PLC (Programmable Logic Controller, programmable logic controller) or timer etc. realizes regularly.
It is thus clear that present embodiment has increased sour water case 202, pickling short circuit regeneration unit 203 and acid discharge unit 204 at least with respect to prior art, promptly increased the process of pickling; And timing unit 208, acid solution recovery unit 209 and water reclaim unit 210.Therefore, reached the purpose that promotes electro-adsorption module regeneration effect, seen for details above-mentioned.
Further, for the electro-adsorption module of long term operation, two kinds of effects can appear during work.The one, the electro-adsorption effect: former water is through between the positive and negative electrode of electro-adsorption module, and wherein negatively charged ion is adsorbed by positive pole, and positively charged ion is adsorbed by negative pole.This process makes former water desalination, reaches the purification purpose.Because the regeneration effect of electro-adsorption module of the present invention is better, so the desalination rate is high than prior art.Another kind of effect is: hydrogen ion on the positive and negative electrode sheet group of electro-adsorption module and the positively charged ion generation exchange interaction in the former water; Group absorption positively charged ion; Hydrogen ion is displaced to former acidity of water is increased, the basicity neutralization in common meeting of this part acidity of increase and the water.This process can be removed anhydrate middle-jiao yang, function of the spleen and stomach ion and basicity, reaches the purpose of purification.Owing to after the acid cleaning process, attached a large amount of hydrogen ions on the electro-adsorption module electrodes, therefore cationic exchange interaction (promptly adsorbing cationic effect) in above-mentioned hydrogen ion and the former water, and acid-base neutralisation effect all than prior art for well.
Further, control can be optimized regeneration effect to the duration of electro-adsorption module flushing, and water consumption.Reclaim the residue acid solution and the water of discharging, so that recycling economizes on resources.
To sum up, present embodiment can guarantee the operation of the long-term continous-stable of electro-adsorption demineralization system.
The present invention also provides a kind of embodiment of electro-adsorption demineralization renovation process, referring to shown in Figure 3, comprises the following steps:
S301, the electro-adsorption module of cleaning the electro-adsorption demineralization system with acid solution.
Concrete; Acid solution with certain pH value feeds in the electro-adsorption module, and the hydrogen ion in the acid solution gets off the cation replacement on the electrode surface group, makes electrode surface group absorption hydrogen ion; Cation concn in the acid solution is raise, reach the purpose of regeneration electro-adsorption module electrodes.
S302, after for some time, discharge through pickling regeneration and clean the acid solution that is produced.
S303, with the electro-adsorption module of water flushing electro-adsorption demineralization system.
Concrete, through the mode of concentration diffusion,, short circuit process and these two ions that the stage bears again of pickling short circuit regeneration are gone out the electro-adsorption module with water flushing electro-adsorption module, reach the purpose of thorough regeneration electro-adsorption module.
The water that S304, discharge are produced through the regeneration flushing.
In concrete the realization, can realize pouring into, discharging of acid solution through motor-mount pump or other modes.
It is thus clear that present embodiment has increased step S301 and S302 at least with respect to prior art, promptly increased the process of pickling.Therefore, reached the purpose that promotes electro-adsorption module regeneration effect, seen for details above-mentioned.
Further, for the electro-adsorption module of long term operation, two kinds of effects can appear during work.The one, the electro-adsorption effect: former water is through between the positive and negative electrode of electro-adsorption module, and wherein negatively charged ion is adsorbed by positive pole, and positively charged ion is adsorbed by negative pole.This process makes former water desalination, reaches the purification purpose.Because the regeneration effect of electro-adsorption module of the present invention is better, so the desalination rate is high than prior art.Another kind of effect is: hydrogen ion on the positive and negative electrode sheet group of electro-adsorption module and the positively charged ion generation exchange interaction in the former water; Group absorption positively charged ion; Hydrogen ion is displaced to former acidity of water is increased, the basicity neutralization in common meeting of this part acidity of increase and the water.This process can be removed anhydrate middle-jiao yang, function of the spleen and stomach ion and basicity, reaches the purpose of purification.Owing to after the acid cleaning process, attached a large amount of hydrogen ions on the electro-adsorption module electrodes, therefore cationic exchange interaction (promptly adsorbing cationic effect) in above-mentioned hydrogen ion and the former water, and acid-base neutralisation effect all than prior art for well.
To sum up, present embodiment can guarantee the operation of the long-term continous-stable of electro-adsorption demineralization system.
The present invention also provides another embodiment of a kind of electro-adsorption demineralization renovation process, referring to shown in Figure 4, comprises the following steps:
S401, the electro-adsorption module of cleaning the electro-adsorption demineralization system with acid solution.
Concrete; Acid solution with certain pH value feeds in the electro-adsorption module, and the hydrogen ion in the acid solution gets off the cation replacement on the electrode surface group, makes electrode surface group absorption hydrogen ion; Cation concn in the acid solution is raise, reach the purpose of regeneration electro-adsorption module electrodes.
S402, after for some time, discharge through pickling regeneration and clean the acid solution that is produced.
The residue acid solution that S403, recovery are discharged.
S404, with the electro-adsorption module of water flushing electro-adsorption demineralization system.
Concrete, through the mode of concentration diffusion, the electro-adsorption module is washed with preset duration water.Short circuit process and these two ions that the stage bears again of pickling short circuit regeneration are gone out the electro-adsorption module, reach the purpose of thorough regeneration electro-adsorption module.
The water that S405, discharge are produced through the regeneration flushing.
The water that S406, recovery are discharged.
In concrete the realization, can realize pouring into, discharging of acid solution through motor-mount pump or other modes.Can realize regularly through PLC or timer etc.
It is thus clear that present embodiment has increased S401, S402 at least with respect to prior art, promptly increased the process of pickling; And the timing content among the step S403, S404, and S406.Therefore, reached the purpose that promotes electro-adsorption module regeneration effect, seen for details above-mentioned.
Further, for the electro-adsorption module of long term operation, two kinds of effects can appear during work.The one, the electro-adsorption effect: former water is through between the positive and negative electrode of electro-adsorption module, and wherein negatively charged ion is adsorbed by positive pole, and positively charged ion is adsorbed by negative pole.This process makes former water desalination, reaches the purification purpose.Because the regeneration effect of electro-adsorption module of the present invention is better, so the desalination rate is high than prior art.Another kind of effect is: hydrogen ion on the positive and negative electrode sheet group of electro-adsorption module and the positively charged ion generation exchange interaction in the former water; Group absorption positively charged ion; Hydrogen ion is displaced to former acidity of water is increased, the basicity neutralization in common meeting of this part acidity of increase and the water.This process can be removed anhydrate middle-jiao yang, function of the spleen and stomach ion and basicity, reaches the purpose of purification.Owing to after the acid cleaning process, attached a large amount of hydrogen ions on the electro-adsorption module electrodes, therefore cationic exchange interaction (promptly adsorbing cationic effect) in above-mentioned hydrogen ion and the former water, and acid-base neutralisation effect all than prior art for well.
Further, control can be optimized regeneration effect to the duration of electro-adsorption module flushing, and water consumption.Reclaim the residue acid solution and the water of discharging, so that recycling economizes on resources.
To sum up, present embodiment can guarantee the operation of the long-term continous-stable of electro-adsorption demineralization system.
Can know that through experiment and system's actual motion the present invention is more thorough to the regeneration of electro-adsorption module.Do not taking before this technology, electro-adsorption module desalting efficiency descends significantly, removes decrease in efficiency 10% in 3 months, adopts technology of the present invention, and after system moved 6 months continuously, the clearance of electro-adsorption module was not seen obvious decline.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention, for example: before acid cleaning process, increase another regeneration flushing process, again for example: increase pickling number of times etc.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. electro-adsorption demineralization regeneration system rapidly comprises: treat regenerated electro-adsorption module, it is characterized in that, also comprise:
The sour water case is used to store acid solution;
Pickling short circuit regeneration unit is used for cleaning above-mentioned electro-adsorption module with the acid solution of sour water case storage;
The acid discharge unit is used to discharge the acid solution that after pickling short circuit regeneration unit cleans, is produced;
Water tank is used for storage of water;
Regeneration flushing unit is used for washing above-mentioned electro-adsorption module with the water of water tank storage;
Drainage cell is used to discharge the water that after regeneration flushing unit flushing, is produced.
2. electro-adsorption demineralization regeneration system rapidly as claimed in claim 1 is characterized in that, also comprises:
Timing unit is used to control the duration that regeneration flushing unit washes above-mentioned electro-adsorption module.
3. electro-adsorption demineralization regeneration system rapidly as claimed in claim 1 is characterized in that, also comprises:
Acid solution reclaims the unit, is used to reclaim the residue acid solution that discharge the acid discharge unit.
4. electro-adsorption demineralization regeneration system rapidly as claimed in claim 1 is characterized in that, also comprises:
Water reclaims the unit, is used to reclaim the water that drainage cell is discharged.
5. an electro-adsorption demineralization renovation process is characterized in that, comprises the following steps:
Pickling regenerated step: the electro-adsorption module of cleaning the electro-adsorption demineralization system with acid solution;
The step of acid discharge: discharge the acid solution that is produced through above-mentioned pickling regeneration step;
The step of regeneration flushing: the electro-adsorption module of washing said electro-adsorption demineralization system with water;
The step of draining: discharge the water that is produced through above-mentioned regeneration rinse step;
Wherein, the step of described pickling regenerated step, acid discharge, the step of regeneration flushing and the step of draining adopt each described electro-adsorption demineralization regeneration system rapidly of claim 1 to 4 to implement.
6. electro-adsorption demineralization renovation process as claimed in claim 5 is characterized in that, in said regeneration rinse step, with preset duration the electro-adsorption module of said electro-adsorption demineralization system is washed.
7. electro-adsorption demineralization renovation process as claimed in claim 5 is characterized in that, also comprises the step that reclaims acid solution: the residue acid solution that reclaims the step discharge of said acid discharge.
8. electro-adsorption demineralization renovation process as claimed in claim 5 is characterized in that, also comprises the step of recycle-water: the water that reclaims the step discharge of said draining.
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| CN102603040B (en) * | 2012-03-30 | 2014-11-26 | 中国石油化工股份有限公司 | Processing method for electro-adsorption demineralized water |
| CN106673276B (en) * | 2017-03-13 | 2023-04-04 | 盐城工学院 | Equipment for treating high-salinity wastewater by virtue of cooperation of photoelectrocatalysis oxidation and electro-adsorption |
| CN106830453B (en) * | 2017-03-13 | 2023-06-20 | 盐城工学院 | Photoelectrocatalytic oxidation-electroadsorption synergy method and equipment for treating high-salt wastewater |
| CN110395828A (en) * | 2019-08-28 | 2019-11-01 | 宝钢工程技术集团有限公司 | A kind of cold rolling wastewater desalting system and method |
| CN114275858A (en) * | 2022-01-27 | 2022-04-05 | 中国华能集团清洁能源技术研究院有限公司 | Plug flow type electrolytic descaling system and method |
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