CN104609642B - A kind of method recycling ion exchange resin denitration regeneration saline - Google Patents
A kind of method recycling ion exchange resin denitration regeneration saline Download PDFInfo
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Abstract
The invention belongs to environmental conservation and water treatment field, it is provided that a kind of method recycling ion exchange resin denitration regeneration saline.Use regeneration saline, the anion exchange resin lost efficacy is carried out the regeneration in two stages, Fractional Collections regenerated saline, and removes sulfate and nitrate therein, be re-used for resin regeneration after processing the former water of azotate pollution.The present invention is removing in regenerated saline while nitrate and sulfate, also reduces the adverse effect of the organic by-products that biochemical treatment produces, reduces the consumption of activated carbon, reduce the cost recycling resin regeneration brine.
Description
Technical field
The invention belongs to environmental conservation and water treatment field, it is provided that one recycles ion exchange resin denitration regenerant salt
The method of water.
Background technology
Subsoil water is important drinking water source in Northern Part of China, but its azotate pollution is heavier.Nitrate enters people
Internal, thus it is possible to vary the physiology microenvironment of intestinal tract, it is unfavorable for the activity of beneficial functions flora；It is likely to be converted into nitrous acid
Be combined with hemoglobin after salt so that it is lose oxygen carrying capacity；Or be combined with organic amine material, generate and have the harmful of carcinogenesis
Material.Therefore, drink nitric acid superstandard drinking water, the health of harmful to human.It addition, the azotate pollution of water can reduce vegetable product
Matter, is also unfavorable for the healthy growth of animal in Aquatic product and livestock and poultry cultivation.Therefore, the northern area of shortage, ground are compared at surface water
Lower water azotate pollution all brings adverse influence to the life of the mankind with producing, it would be highly desirable to administer.
In water, the minimizing technology of nitrate mainly has physical-chemical process, chemical method and biochemical process.Physical-chemical process mainly has
Distillation, electrodialysis, reverse osmosis, ion exchange etc..Wherein, former three does not the most have selectivity, except also been removed water while nitre
In other element useful to human body；Ion exchange is quick, it is easy to Automated condtrol, but produces high nitre high-salt wastewater.In fact,
The simply transfer of all physics chemistry method and enrichment nitrate, the nitrate wastewater of generation needs to carry out suitable subsequent treatment,
It is allowed for access environment.
Electronation can be reducing agent with the active metal such as aluminum, ferrum simple substance except nitre method, it is also possible to hydrogen, formic acid etc. is
Reducing agent, reduction nitrate under catalyst action.Either active metal reducing process, or catalytic reduction method, all easily shape
Become nitrite or ammonium class by-product, actual application also has many restrictions.
Biological denitrification be denitrifying bacteria be the process of nitrogen by nitrate reduction, including autotrophy and heterotrophic denitrification two kinds
Type.Wherein, autotrophic denitrification is using the inorganic matter such as hydrogen, elemental sulfur as electron donor, and denitrification rate is relatively slow, but goes out water quality
Preferably.But, hydrogen autotrophic denitrification is low, explosive due to hydrogen solubility, and large-scale application is difficult；Sulfur autotrophic denitrification can produce
Raw sulfate radical and acidity, be only suitable for processing nitrate and exceed standard serious and that sulfate concentration is the highest former water.Heterotrophic denitrification
Using organic carbon source as electron donor, denitrification rate is very fast, but carbon source adds requirement height, and excess can remain and increase follow-up place
Reason difficulty, adds deficiency and is easily caused the accumulation of water outlet nitrite.
Performance ion exchange and the respective advantage of biochemical process can be combined, be enriched with in former water with ion exchange transfer
Nitrate, then thoroughly removes the high concentration nitrate in ion exchange resin regeneration saline in biochemical mode.But, on earth's surface
The less hinterland of runoff, regeneration saline except after nitre or can not outer row easily because outer salt discharge water is easily detected by earth's surface
Runoff is taken away, but mostly eventually enters into underground, thus promotes soil and groundwater salinization.
Therefore, in hinterland, recycle ion exchange resin denitration regeneration saline, could be reduced it to greatest extent
Adverse effect to environment.Accomplish this point, need to control the accumulation of sulfate in regeneration saline；Need to remove biological denitrification
During produce organic by-products；Need to remove other harmful substance may being enriched with in regeneration saline, such as arsenate.Only
Have so, recycle regeneration saline and just will not pollute resin and reduce resin except nitre ability.
Sulfate radical minimizing technology in regeneration saline substantially has three kinds: biological sulphate reduction, calcium sulfate precipitation and sulfur
Acid precipitated barium.Sulfate reduction method is only suitable for regenerating the situation that in saline, sulfate concentration is the highest；Calcium sulfate precipitation goes sulfuric acid
It is a contradiction between salt and calcium ion remnants, and requires that pH neutrality is the most acid；Barium sulfate precipitate goes the effect of sulfate radical
Fruit is better than calcium sulfate precipitation, but cost is higher.
When heterotrophic denitrification processes denitration regeneration saline, nitrate concentration is typically at more than 30mmol/L, the most organic
Carbon source demand is also at more than 1500mg BOD/L.In this case, the organic by-products concentration that in water outlet, bacterial metabolism is formed is also
Higher, process by conventional active carbon adsorption, effect is unsatisfactory, and carbon, C regeneration is relatively costly.
Summary of the invention
Removing the nitre regeneration saline adverse effect to environment to reduce ion exchange resin, the present invention provides a kind of circulation profit
The method of spent ion exchange resin denitration regeneration saline.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of method recycling ion exchange resin denitration regeneration saline: use regeneration saline, to processing nitrate
The anion exchange resin lost efficacy after polluted raw carries out the regeneration in two stages, Fractional Collections regenerated saline, and removes it
In sulfate and nitrate, be re-used for resin regeneration.
Wherein, in regeneration saline, the concentration of villaumite is 0.1-1.0mol/L, and the concentration of bicarbonate is 0.05-0.5mol/
The total salt concentration of L, villaumite and bicarbonate is 0.3-1.5mol/L.
Described, first carry out first stage resin regeneration process, and when the concentration of regenerated sulfate anion in brine system is at 60-
Terminating time between 120mmol/L, collecting gained is first stage regenerated saline；Then proceed at second stage resin
Reason, stops when concentration 2-10mmol/L of nitrate anion in regenerated saline, and collecting gained is second stage regenerated saline.
Described, in described first stage regenerated saline, add the acetic acid as denitrifying carbon source, make pH < 7.0, then
Add calcium chloride, make calcium ion remnants 10-20mmol/L, remove part of sulfuric acid root, then the first rank with calcium sulfate precipitation form
Section regenerated saline mixes with second stage regenerated saline, utilizes the bicarbonate radical basicity in second stage waste water to form carbonic acid
Calcium deposit, makes regenerated saline calcium ion residual concentration < 3mmol/L.
< the regenerated saline of 3mmol/L processes described calcium ion residual concentration for biological denitrification, denitrification process
In, it is to remove calcium ion residual concentration < carbon source needed for all nitrate of regenerated saline of 3mmol/L that organic carbon source adds total amount
The i.e. 10-20% of 80-90%(not enough), to reduce the formation of organic by-products in biological treatment process, and add 1-5mmo/L's
Sulfide, makes denitrification process terminate rear nitrite residual concentration < 1.0mmol/L.
Wherein, adding calcium chloride in the regenerated saline after biological denitrification processes, its molar equivalent added is anti-
The 40-60% of nitrifying process nitrate removal molar equivalent, the Speleothem precipitation adsorption Organic substance therein of formation, then
After filtering, sterilizing, it is re-used for resin regeneration.
Special purpose device:
Device includes that former pond (1), ion exchange resin column (2), ion are swapped out pond (3), resin regeneration intake pool
(4), resin regeneration first stage discharge bay (5), calcium sulfate precipitation pond (6), resin regeneration second stage discharge bay (7), carbonic acid
Calcium deposit pond (8), biological denitrification reaction system (9), precipitation of calcium carbonate adsorption tank (10), filter (11), disinfector (12),
Intake pool (14) is cleaned in regeneration saline storage pool (13), resin and resin washes out pond (15)；
Wherein, former pond (1) outlet, resin regeneration first stage discharge bay (5) water inlet, resin regeneration second stage
Discharge bay (7) water inlet and resin wash out pond (15) water inlet respectively by carrying valvular pipeline and ion exchange resin
The parallel connection in one end of post (2)；It is clear that ion is swapped out pond (3) water inlet, resin regeneration intake pool (4) outlet and resin
Wash intake pool (14) outlet respectively by the parallel company of the other end with valvular pipeline Yu ion exchange resin column (2)
Logical；
Calcium sulfate precipitation pond (6), precipitation of calcium carbonate pond (8), biological denitrification reaction system (9), precipitation of calcium carbonate absorption
Pond (10), filter (11), disinfector (12), regeneration saline storage pool (13) and resin regeneration intake pool (4) pass sequentially through pipe
Road is connected；Described calcium sulfate precipitation pond (6) is connected with resin regeneration first stage discharge bay (5) outlet by pipeline, carbonic acid
Calcium deposit pond (8) is connected by pipeline with resin regeneration second stage discharge bay (7) outlet.
Described biological denitrification reaction system (9) includes the intrinsic pressure bascule of denitrification reactor, denitrification reactor, liquid
Feng Chi；The air inlet of the intrinsic pressure bascule of reactor is communicated with denitrification reactor upper end by pipeline, its gas outlet with pass through
Pipeline communicates with bottom denitrification reactor, and its excessive QI KOU connects sebific duct, in the other end immersion fluid-tight pond of sebific duct under liquid level.
Advantage for present invention is:
1. the present invention is while the nitrate removed in resin regeneration effluent brine and sulfate, has been greatly reduced biology
The adverse effect of organic by-products produced by denitrification, reduces the cost recycling resin regeneration brine.
2. the present invention utilizes the acetic acid as carbon source to be acidified first stage regenerated saline, goes sulfate radical to create for precipitation
Make condition；The precipitation of calcium carbonate formed after first and second stage regeneration effluent brine mixing, reduces calcium ion remaining, is beneficial to biological anti-
The operation of nitrification.
3. the denitrification that carbon source is limited is conducive to improving utilization of carbon source rate, reduces the formation of organic by-products.
4. utilize basicity that denitrification process produces and the calcium chloride that external source is added, generate Speleothem, flocculation sediment
Remove the water solublity organic by-products that denitrification process produces, reduce activated carbon consumption.
Accompanying drawing explanation
Fig. 1 is the device of the ion exchange resin denitration regenerant salt water circulation use method that the embodiment of the present invention provides.
Detailed description of the invention
Embodiment 1
The device recycling ion exchange resin denitration regeneration saline includes: former pond (1), ion exchange resin column
(2), ion is swapped out pond (3), resin regeneration intake pool (4), resin regeneration first stage discharge bay (5), calcium sulfate precipitation
Pond (6), resin regeneration second stage discharge bay (7), precipitation of calcium carbonate pond (8), biological denitrification reaction system (9), calcium carbonate
Precipitation adsorption pond (10), filter (11), disinfector (12), regeneration saline storage pool (13), resin clean intake pool (14) and
Resin washes out pond (15).Wherein, former pond (1) outlet, resin regeneration first stage discharge bay (5) water inlet, resin
Regeneration second stage discharge bay (7) water inlet and resin wash out pond (15) water inlet respectively by carry valvular pipeline with
The parallel connection in one end of ion exchange resin column (2)；Ion is swapped out pond (3) water inlet, resin regeneration intake pool (4) goes out
The mouth of a river and resin clean intake pool (14) outlet respectively by carrying another of valvular pipeline and ion exchange resin column (2)
Hold parallel connection.Calcium sulfate precipitation pond (6), precipitation of calcium carbonate pond (8), biological denitrification reaction system (9), precipitation of calcium carbonate
Adsorption tank (10), filter (11), disinfector (12), regeneration saline storage pool (13) and resin regeneration intake pool (4) lead to successively
Cross pipeline to be connected；Described calcium sulfate precipitation pond (6) is connected with resin regeneration first stage discharge bay (5) outlet by pipeline,
Precipitation of calcium carbonate pond (8) is connected by pipeline with resin regeneration second stage discharge bay (7) outlet.
The former water of ion exchange resin treatment: ion exchange column (2) high 100cm, inside fills out the 717 type anion exchanges regenerated
Resin.Former water pH value is 7.3, and nitrate concentration is 3.2mmol/L, and sulfate concentration is 2.1mmol/L, and chlorine ion concentration is
0.8mmol/L.Unlatching connection former pond (1) outlet and ion are swapped out the valve of pond (3) water inlet, 20-24 DEG C of condition
Under, process former water with the flow velocity of 13.5BV/h.Running to 14 hours, the nitrate concentration in water outlet, more than 0.7mmol/L, is closed
Above-mentioned two valve, enters the resin regeneration stage.
Ion exchange resin regeneration and cleaning: the regeneration saline used by resin regeneration contains the sodium chloride of 0.5N, 0.07N
Sodium bicarbonate and the potassium sulfate of 0.1N.First turn on connection resin regeneration intake pool (4) outlet and resin regeneration first stage
The valve of discharge bay (5) water inlet, carries out first stage resin regeneration with flow velocity for 4.5BV/h.After 1 hour, regenerated saline
When middle sulfate concentration is 110mmol/L, close the valve of connection resin regeneration first stage discharge bay (5) water inlet, open
The valve of connection resin regeneration second stage discharge bay (7) water inlet, carries out second stage resin again with the flow velocity of 4.5BV/h
Raw.After 2 hours, the nitrate concentration in regenerated saline is 6.5mmol/L, closes connection resin regeneration intake pool (4) water outlet
Mouth and the valve of resin regeneration second stage discharge bay (7) water inlet.Open connection resin clean intake pool (14) outlet and
Resin washes out the valve of pond (15) water inlet, the former water after spent ion exchange resin process, with the flow velocity of 6BV/h, cleans
Resin 1 hour, is then shut off connecting resin and cleans intake pool (14) outlet and resin and wash out the valve of pond (15) water inlet
Door, completes regeneration of ion-exchange resin and cleaning.
Pretreatment before regenerated saline biochemical treatment: the regeneration abraum salt that resin regeneration first stage discharge bay (5) collects
Water enters calcium sulfate precipitation pond (6), and sulfate concentration is 216mmol/L, first adds the acetic acid of 75mmol/L, makes pH < 7.0, so
The calcium chloride of rear interpolation 130mmol/L, produces calcium sulfate precipitation, makes sulfate residual concentration be down between 80-100mmol/L.
Then the regenerated saline supernatant of calcium sulfate precipitation pond (6) and resin regeneration second stage discharge bay (7) collected is at carbon
Mixing in acid calcium deposit pond (8), utilizes the basicity in second stage regenerated saline, forms precipitation of calcium carbonate, makes mixed regeneration
In effluent brine, calcium ion residual concentration is reduced to below 3mmol/L, completes the pretreatment before regenerated saline biochemical treatment.On it
Clear liquid enters biological denitrification reaction system (9).
Nitrate in biological denitrification removal regenerated saline: the anti-nitration reaction of biological denitrification reaction system (9)
Device height 100cm, internal diameter 9cm, effective volume is 5.4L, with the exchange rate of 45%, sequencing batch operation under the conditions of 20-24 DEG C.One
The air inlet of the airbag of 10L communicates with denitrification reactor upper end, and gas outlet communicates with the bottom of denitrification reactor, QI KOU of overflowing
Silica gel tube water-immersed with one end communicates.Every 10 minutes intervals, by the carbon dioxide in airbag and the mixed gas pair of nitrogen
Denitrification reactor carries out the inner circulating aerating of 15 seconds, the pH change in simultaneous buffering denitrification reactor.Airbag also serves as instead
Answer the intrinsic pressure adjusting means of device, avoid oxygen to enter denitrification reactor when water inlet or draining.Formal process regenerated saline
Before, the denitrifying activated sludge in nitrator (10) first accepts domestication and cultivates.Domestication is cultivated saline used and is contained
The sodium chloride of 0.5mol/L, the sodium bicarbonate of 0.20mol/L and the potassium sulfate of 0.1mol/L, nitrate concentration progressively from
30mmol/L increases to 40,50 and 60mmol/L, and under each concentration, domestication is cultivated about 2 weeks.It is above-mentioned that acetic acid adds total amount
Remove calcium ion residual concentration and < needed for all nitrate of regenerated saline of 3mmol/L the 70% of carbon source, and add 2mmol/L's
The accumulation of sodium sulfide regulation and control nitrite.At the end of denitrification, nitrate residual concentration is stable at more than 5mmol/L, and nitrous acid
Salt residual concentration is stable at below 0.5mmol/L, terminates domestication and cultivates.Then it is used for locating by the biological denitrification system tamed
The supernatant (i.e. through the regenerated saline of pretreatment) of reason precipitation of calcium carbonate pond (8).Nitrate concentration in supernatant is
38.1mmol/L, while removing sulfate radical by second acid for adjusting pH precipitation, is also biological denitrification in calcium sulfate precipitation pond (6)
Remove all nitrate and with the addition of the carbon source of 80%.Running additionally adds the sodium sulfide of 2mmol/L, and utilizes titanium dioxide
Carbon aeration maintains pH between 8.0-9.0.After running 12 hours, nitrate remnants are stable at about 4.8mmol/L, nitrous acid
Salt remnants are 0.2mmol/L, complete denitrification and process.
The post processing that denitrification processes: biological denitrification reaction system (9) water outlet enters precipitation of calcium carbonate adsorption tank (10),
In the case of being sufficiently stirred for, add the calcium chloride of 20mmol/L, utilize in Speleothem precipitation adsorption denitrification water outlet
Organic substance.After 1 hour, supernatant after calcium carbonate activated carbon combination filter (11) and ozonateur (12) process,
Enter regeneration saline storage pool (13), and add the sodium chloride of loss in regenerative process, enter resin regeneration intake pool (4), then
Secondary for resin regeneration.
Embodiment 2
Structure and the biological denitrification system structure of resin column and tame same as in Example 1.
The former water of ion exchange resin treatment: former water pH value is 7.3, nitrate concentration is 4.2mmol/L, and sulfate concentration is
1.6mmol/L, chlorine ion concentration is 0.8mmol/L.Open connection former pond (1) outlet and ion is swapped out pond (3) and enters
The valve at the mouth of a river, under the conditions of 20-24 DEG C, processes former water with the flow velocity of 13.5BV/h.Run to 15 hours, the nitrate anion in water outlet
Concentration, more than 0.7mmol/L, closes above-mentioned two valve, enters the resin regeneration stage.
Ion exchange resin regeneration and cleaning: the regeneration saline used by resin regeneration contains the sodium chloride of 0.5N, 0.14N
Sodium bicarbonate and the potassium sulfate of 0.1N.First turn on connection resin regeneration intake pool (4) outlet and resin regeneration first stage
The valve of discharge bay (5) water inlet, carries out first stage resin regeneration with flow velocity for 4.5BV/h.After 1 hour, regenerated saline
When middle sulfate concentration is 108mmol/L, close the valve of connection resin regeneration first stage discharge bay (5) water inlet, open
The valve of connection resin regeneration second stage discharge bay (7) water inlet, carries out second stage resin again with the flow velocity of 4.5BV/h
Raw.After 2.5 hours, the nitrate concentration in regenerated saline is 5.4mmol/L, close connection resin regeneration intake pool (4) and
The valve of resin regeneration second stage discharge bay (7) water inlet.Open connection resin and clean intake pool (14) outlet and resin
Wash out the valve of pond (15) water inlet, the former water after spent ion exchange resin process, with the flow velocity of 6BV/h, clean resin 1
Hour, it is then shut off connecting resin and cleans intake pool (14) outlet and resin and wash out the valve of pond (15) water inlet, complete
Become regeneration of ion-exchange resin and cleaning.
Pretreatment before regenerated saline biochemical treatment: the regeneration abraum salt that resin regeneration first stage discharge bay (5) collects
Water enters calcium sulfate precipitation pond (6), and sulfate concentration is 207mmol/L, first adds the acetic acid of 150mmol/L, makes pH < 7.0, so
The calcium chloride of rear interpolation 130mmol/L, produces calcium sulfate precipitation, makes sulfate residual concentration be down between 80-100mmol/L.
Then the regenerated saline supernatant of calcium sulfate precipitation pond (6) and resin regeneration second stage discharge bay (7) collected is at carbon
Mixing in acid calcium deposit pond (8), utilizes the basicity in second stage regenerated saline, forms precipitation of calcium carbonate, makes mixed regeneration
In effluent brine, calcium ion residual concentration is reduced to below 3mmol/L, completes the pretreatment before regenerated saline biochemical treatment.On it
Clear liquid enters biological denitrification reaction system (9).
Biological denitrification removes the nitrate in regenerated saline: the biological denitrification system tamed is used for processing carbonic acid
The supernatant (i.e. through the regenerated saline of pretreatment) in calcium deposit pond (8).Nitrate concentration in supernatant is 48.3mmol/
L, while removing sulfate radical by second acid for adjusting pH precipitation, also removes all in calcium sulfate precipitation pond (6) for biological denitrification
Nitrate with the addition of the carbon source of 85%.Running additionally adds the sodium sulfide of 2mmol/L, and utilizes carbon dioxide aeration handle
PH maintains between 8.0-9.0.After running 16 hours, nitrate remnants are stable at about 4.0mmol/L, nitrite remnants is
0.1mmol/L, completes denitrification and processes.
The post processing that denitrification processes: biological denitrification reaction system (9) water outlet enters precipitation of calcium carbonate adsorption tank (10),
In the case of being sufficiently stirred for, add the calcium chloride of 25mmol/L, utilize in Speleothem precipitation adsorption denitrification water outlet
Organic substance.After 1 hour, supernatant after calcium carbonate activated carbon combination filter (11) and ozonateur (12) process,
Enter regeneration saline storage pool (13), and add the sodium chloride of loss in regenerative process, enter resin regeneration intake pool (4), then
Secondary for resin regeneration.
Claims (5)
1. the method recycling ion exchange resin denitration regeneration saline, it is characterised in that:
Use villaumite and bicarbonate mixed type regeneration saline, to the anion exchange tree lost efficacy after processing the former water of azotate pollution
Fat carries out the regeneration in two stages, Fractional Collections regenerated saline, and removes sulfate and nitrate therein, is re-used for tree
Fat regenerates；
First first stage resin regeneration process is carried out, and when the concentration of regenerated sulfate anion in brine system is at 60-120 mmol/L
Between time terminate, collect gained be first stage regenerated saline；Then proceed second stage resin treatment, work as regenerated
In saline, the concentration of nitrate anion stops when being 2-10 mmol/L, and collecting gained is second stage regenerated saline；
In described first stage regenerated saline, add the acetic acid as denitrifying carbon source, make pH < 7.0, then add chlorination
Calcium, makes calcium ion remnants 10-20 mmol/L, removes part of sulfuric acid root, then first stage regenerated with calcium sulfate precipitation form
Saline mixes with second stage regenerated saline, utilizes the bicarbonate radical basicity in second stage regenerated saline to form calcium carbonate
Precipitation, makes calcium ion residual concentration in regenerated saline < carry out biological denitrification process after 3 mmol/L；
Adding calcium chloride in regenerated saline after biological denitrification processes, its molar equivalent added is denitrification process nitre
The 40-60% of molar equivalent removed by hydrochlorate, and the Speleothem precipitation adsorption Organic substance therein of formation, then through filtering, disappearing
After poison, it is re-used for resin regeneration.
2. the method recycling ion exchange resin denitration regeneration saline as described in claim 1, it is characterised in that: regeneration
In saline, the concentration of villaumite is 0.1-1.0 mol/L, and the concentration of bicarbonate is 0.05-0.5 mol/L, villaumite and bicarbonate
Total salt concentration be 0.3-1.5 mol/L.
3. the method recycling ion exchange resin denitration regeneration saline as described in claim 1, it is characterised in that:
In denitrification process, it is to remove calcium ion residual concentration < in the regenerated saline of 3 mmol/L that organic carbon source adds total amount
Needed for all nitrate, the i.e. 10-20% of the 80-90%(of carbon source is not enough), to reduce the shape of organic by-products in biological treatment process
Become, and add the sulfide of 1-5 mmol/L, make denitrification process terminate rear nitrite residual concentration < 1.0 mmol/L.
4. a special purpose device for the method recycling ion exchange resin denitration regeneration saline described in claim 1, its
It is characterised by:
Device include former pond (1), ion exchange resin column (2), ion be swapped out pond (3), resin regeneration intake pool (4),
Resin regeneration first stage discharge bay (5), calcium sulfate precipitation pond (6), resin regeneration second stage discharge bay (7), calcium carbonate sink
Pond, shallow lake (8), biological denitrification reaction system (9), precipitation of calcium carbonate adsorption tank (10), filter (11), disinfector (12), regeneration
Intake pool (14) is cleaned in saltwater-storage pond (13), resin and resin washes out pond (15)；
Wherein, former pond (1) outlet, resin regeneration first stage discharge bay (5) water inlet, resin regeneration second stage water outlet
Pond (7) water inlet and resin wash out pond (15) water inlet respectively by carrying valvular pipeline and ion exchange resin column
(2) the parallel connection in one end；Ion is swapped out pond (3) water inlet, resin regeneration intake pool (4) outlet and resin and cleans
Intake pool (14) outlet is respectively by connecting with valvular pipeline is parallel with the other end of ion exchange resin column (2)；
Calcium sulfate precipitation pond (6), precipitation of calcium carbonate pond (8), biological denitrification reaction system (9), precipitation of calcium carbonate adsorption tank
(10), filter (11), disinfector (12), regeneration saline storage pool (13) and resin regeneration intake pool (4) pass sequentially through pipeline
It is connected；Described calcium sulfate precipitation pond (6) is connected with resin regeneration first stage discharge bay (5) outlet by pipeline, calcium carbonate
Sedimentation tank (8) is connected by pipeline with resin regeneration second stage discharge bay (7) outlet.
5. the special purpose device of the method recycling ion exchange resin denitration regeneration saline described in claim 4, its feature
It is: described biological denitrification reaction system (9) includes the intrinsic pressure bascule of denitrification reactor, denitrification reactor, fluid-tight
Pond；The air inlet of the intrinsic pressure bascule of denitrification reactor is communicated with denitrification reactor upper end by pipeline, its gas outlet with
Being communicated with bottom denitrification reactor by pipeline, its excessive QI KOU connects sebific duct, and the other end of sebific duct immerses liquid in fluid-tight pond
Under face.
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| JP2001179296A (en) * | 1999-12-27 | 2001-07-03 | Japan Organo Co Ltd | Method for treating water containing nitrate ions and/or nitrite ions |
| FR2867182A1 (en) * | 2004-03-04 | 2005-09-09 | Lyonnaise Eaux France | Process of treatment of a water charged of nitrates, useful denitrification of water, comprises denitration of water carried out on ion exchange resin and biological treatment with bacteria to reduce the nitrates in gaseous nitrogen |
| CN101289242A (en) * | 2007-04-16 | 2008-10-22 | 罗门哈斯公司 | Water treatment method |
| CN101863564A (en) * | 2010-07-01 | 2010-10-20 | 南京大学 | Drinking water source advanced water treatment method based on resin and zeolite |
| CN102659264A (en) * | 2012-05-22 | 2012-09-12 | 麻克栋 | Ion exchange pretreatment method of softened/demineralized water |
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2013
- 2013-11-05 CN CN201310544828.9A patent/CN104609642B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001179296A (en) * | 1999-12-27 | 2001-07-03 | Japan Organo Co Ltd | Method for treating water containing nitrate ions and/or nitrite ions |
| FR2867182A1 (en) * | 2004-03-04 | 2005-09-09 | Lyonnaise Eaux France | Process of treatment of a water charged of nitrates, useful denitrification of water, comprises denitration of water carried out on ion exchange resin and biological treatment with bacteria to reduce the nitrates in gaseous nitrogen |
| CN101289242A (en) * | 2007-04-16 | 2008-10-22 | 罗门哈斯公司 | Water treatment method |
| CN101863564A (en) * | 2010-07-01 | 2010-10-20 | 南京大学 | Drinking water source advanced water treatment method based on resin and zeolite |
| CN102659264A (en) * | 2012-05-22 | 2012-09-12 | 麻克栋 | Ion exchange pretreatment method of softened/demineralized water |
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