CN106830416A - A kind of method that guanite precipitation method process desulfurization wastewater - Google Patents
A kind of method that guanite precipitation method process desulfurization wastewater Download PDFInfo
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- CN106830416A CN106830416A CN201611135306.3A CN201611135306A CN106830416A CN 106830416 A CN106830416 A CN 106830416A CN 201611135306 A CN201611135306 A CN 201611135306A CN 106830416 A CN106830416 A CN 106830416A
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- guanite
- desulfurization wastewater
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- precipitation method
- under agitation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
A kind of guanite precipitation method process the process of desulfurization wastewater, including the regulation of a. magnesium N∶P ratio：Under agitation, to appropriate supplement N sources and P sources in desulfurization wastewater, Mg is adjusted:N:P is certain mol ratio；B. the synthesis of guanite：Under agitation, pH is constant to 89 in regulating step a, reaction a period of time, obtains guanite sediment；C. mud-water separation：Step b solidliquid mixtures are transferred in dewaterer, be measured for the sewage after dehydration by the sediment for obtaining as guanite.The process that the present invention is provided has low cost, and body refuse value is high, the advantages of turning waste into wealth.
Description
Technical field
The present invention relates to a kind of process of chemical field treatment of Power desulfurization wastewater, particularly a kind of guanite precipitation
Method processes the process of desulfurization wastewater.
Background technology
At present, Desulphurization for Coal-fired Power Plant wastewater treatment and zero-discharge technology are increasingly paid close attention to by country and environmental protection industry (epi),
Cause at home widely studied.The water quality situation of desulfurization wastewater is as follows：Mg2+It is 18000-30000mg/L, NH3- N is 500-
1000mg/L, Ca2+It is 400-800mg/L, SO4 2-It is 20000-30000mg/L, Cl-For 6000-10000mg/L and a small amount of
The compositions such as heavy metal ion, fluorine ion and silica.Mg in waste water2+The reason for concentration is higher be in FEOL lime stone with it is wet
The SO that method absorbs2What waste water reaction was brought into during preparing gypsum, magnesium in limestone content is higher.Currently, desulfurization wastewater
Preconditioning technique is using NaOH or Ca (OH)2PH to more than 10 is adjusted to reduce the hardness in waste water.The method exist with
Lower Railway Project：1) theory for adding high cost, not meeting energy-conserving and environment-protective of NaOH.2)Ca(OH)2Low cost is added, but is produced
Body refuse amount it is larger.3) body refuse composition mixes, thus is defined as solid waste or micro- useless, and processing cost is high.Therefore, how resource
Changing each ion in reclaiming desulfurization wastewater has great strategic importance.
Guanite, main chemical compositions are MgNH4PO4·6H2O, is a kind of fabulous slow-release fertilizer.And it is rich in desulfurization wastewater
Containing Mg2+And NH3- N, additionally adds phosphate, can synthesis guanite, reaction equation under conditions of pH is 8-9：Mg2++
PO4 3-+NH4 ++6H2O→MgNH4PO4·6H2O, this opens a new thinking for the pretreatment of desulfurization wastewater.The present invention is
Mg in control desulfurization wastewater:N:The molar ratio of P, to supplement N and P appropriate in desulfurization wastewater, after regulation pH to reaction completely,
Mg in desulfurization wastewater can largely be removed2+And NH3- N, while guanite can be obtained again.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of low cost, and body refuse value is high, and the bird that can turn waste into wealth
The technique that the coprolite precipitation method process desulfurization wastewater.
In order to solve the above technical problems, the present invention provides the process that a kind of guanite precipitation method process desulfurization wastewater,
The process is comprised the following steps：
A. magnesium N∶P ratio regulation：Under agitation, to appropriate supplement N sources and P sources in desulfurization wastewater, Mg is adjusted:N:P
It is certain mol ratio；
B. the synthesis of guanite：Under agitation, pH is constant to 8-9 in regulating step a, reaction a period of time, obtains
Guanite sediment；
C. mud-water separation：Step b solidliquid mixtures are transferred in dewaterer, the sediment for obtaining as guanite, will be de-
Sewage after water is measured.
Further, the N sources described in step a can be one or more in ammoniacal liquor, ammonium chloride or ammonium sulfate.
Further, the P sources described in step a can be phosphoric acid, sodium phosphate, disodium-hydrogen, sodium dihydrogen phosphate, phosphoric acid
One or more in one hydrogen ammonium and ammonium dihydrogen phosphate.
Further, the pH adjusting agent described in step b can be the one kind in NaOH and ammonia spirit.
Further, the dewaterer described in step c can be the one kind in plate and frame filter press and centrifuge.
Process of the invention has advantages below：
1st, the present invention is using substantial amounts of Mg in desulfurization wastewater2+And NH4 +Generation guanite precipitation, the precipitation is a kind of good
Slow release fertilizer, it is achieved thereby that Mg2+And NH4 +Resource reclaim.
2nd, it is of the invention by Mg in desulfurization wastewater2+And NH4 +Recovery is separated, and on the one hand reduces desulfurization wastewater subsequently each
The separating difficulty of ion, on the other hand greatly reduces solid waste or micro- useless yield, and processing cost is reduced to greatest extent.
3rd, to fully take into account desulfurization wastewater Several Traditional Preconditioning Methods reagent consumption amount big for the present invention, solid waste and micro- useless body refuse amount
The shortcomings of big and processing cost is high, guanite precipitation law technology for desulfurization wastewater it is reasonable, effective process propose one it is new
Thinking.
4th, the present invention complies with the developing direction of " energy-conserving and environment-protective " using guanite precipitation method treatment desulfurization wastewater, realizes comprehensive
Improvement, energy-saving and emission-reduction, low-carbon environment-friendly and the purpose for turning waste into wealth.
Specific embodiment
With the desulfurization wastewater of certain coal-burning power plant, as experiment water quality, the invention will be further described in conjunction with the embodiments below.Tool
Body water quality see the table below：
| Project | pH | |||
| Index | 6.8 | 22000 | 800 | Do not detect |
Embodiment 1
Step a：Under agitation, to 7288mg sodium phosphates are supplemented in 1L desulfurization wastewaters, Mg is adjusted:N:P mol ratios are about
It is 21:1:1；
Step b：Under agitation, it is 10% liquid caustic soda to mass fraction is added in step a, regulation pH is constant to 8.5, instead
30min is answered, guanite reactant is obtained；
Step c：Step b solidliquid mixtures are transferred in centrifuge, the sediment for obtaining as guanite, after centrifugation
Sewage be measured.
Interpretation of result：Mg is remained in sewage after centrifugation2+It is 19008mg/L, NH4 +It is 56mg/L, PO4 3-It is 34mg/L.
Embodiment 2
Step a：Under agitation, to supplement 57618mg monoammonium phosphates and 42777mg phosphoric acid in 1L desulfurization wastewaters,
Regulation Mg:N:P mol ratios are about 1:1:1；
Step b：Under agitation, it is 30% liquid caustic soda to mass fraction is added in step a, regulation pH is constant to 8, reaction
60min, obtains guanite reactant；
Step c：Step b solidliquid mixtures are transferred in centrifuge, the sediment for obtaining as guanite, after centrifugation
Sewage be measured.
Interpretation of result：Mg is remained in sewage after centrifugation2+It is 31mg/L, NH4 +It is 112mg/L, PO4 3-It is 93mg/L.
Embodiment 3
Step a：Under agitation, to 288090mg monoammonium phosphates are supplemented in 10L desulfurization wastewaters, Mg is adjusted:N:P rubs
That ratio about 4:2:1；
Step b：Under agitation, it is 20% liquid caustic soda to mass fraction is added in step a, regulation pH is constant to 9, reaction
50min, obtains guanite reactant；
Step c：Step b solidliquid mixtures are transferred in centrifuge, the sediment for obtaining as guanite, after centrifugation
Sewage be measured.
Interpretation of result：Mg is remained in sewage after centrifugation2+It is 14595mg/L, NH4 +It is 6497mg/L, PO4 3-It is 28mg/
L。
Embodiment 4
Step a：Under agitation, to supplement 4725600mg ammonium sulfate and 2604280mg phosphoric acid in 20L desulfurization wastewaters
One hydrogen sodium, adjusts Mg:N:P mol ratios are about 1:2:1；
Step b：Under agitation, it is 15% liquid caustic soda to mass fraction is added in step a, regulation pH is constant to 8.3, instead
40min is answered, guanite reactant is obtained；
Step c：Step b solidliquid mixtures are transferred in plate and frame filter press, the body refuse for obtaining as guanite will be pressed
Sewage after filter is measured.
Interpretation of result：Mg is remained in sewage after centrifugation2+It is 83mg/L, NH4 +It is 19986mg/L, PO4 3-It is 69mg/L.
Embodiment 5
Step a：Under agitation, in 30L desulfurization wastewaters simultaneously supplement 916650mg ammoniacal liquor and 6602400mg phosphoric acid
Sodium dihydrogen, adjusts Mg:N:P mol ratios are about 1:1:2；
Step b：Under agitation, it is 25% liquid caustic soda to mass fraction is added in step a, regulation pH is constant to 8.7, instead
30min is answered, guanite reactant is obtained；
Step c：Step b solidliquid mixtures are transferred in plate and frame filter press, the body refuse for obtaining as guanite will be pressed
Sewage after filter is measured.
Interpretation of result：Mg is remained in sewage after centrifugation2+It is 45mg/L, NH4 +It is 63mg/L, PO4 3-It is 87101mg/L.
Claims (5)
1. a kind of method that guanite precipitation method process desulfurization wastewater, it is characterised in that：
A. magnesium N∶P ratio regulation：Under agitation, to appropriate supplement N sources and P sources in desulfurization wastewater, Mg is adjusted:N:P is one
Fixed mol ratio；
B. the synthesis of guanite：Under agitation, pH is constant to 8-9 in regulating step a, reaction a period of time, obtains birds droppings
Stone sediment；
C. mud-water separation：Step b solidliquid mixtures are transferred in dewaterer, the sediment for obtaining as guanite, after dehydration
Sewage be measured.
2. the method that a kind of guanite precipitation method according to claim 1 process desulfurization wastewater, it is characterised in that：Step a
Described in N sources can be one or more in ammoniacal liquor, ammonium chloride or ammonium sulfate.
3. the method that a kind of guanite precipitation method according to claim 1 process desulfurization wastewater, it is characterised in that：Step a
Described in P sources can be phosphoric acid, sodium phosphate, disodium-hydrogen, sodium dihydrogen phosphate, monoammonium phosphate and ammonium dihydrogen phosphate
One or more.
4. a kind of guanite precipitation method according to claim 1 process the process of desulfurization wastewater, it is characterised in that：Step
PH adjusting agent described in rapid b can be the one kind in NaOH and ammonia spirit.
5. a kind of guanite precipitation method according to claim 1 process the process of desulfurization wastewater, it is characterised in that：Step
Dewaterer described in rapid c can be the one kind in plate and frame filter press and centrifuge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611135306.3A CN106830416A (en) | 2016-12-11 | 2016-12-11 | A kind of method that guanite precipitation method process desulfurization wastewater |
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| CN201611135306.3A CN106830416A (en) | 2016-12-11 | 2016-12-11 | A kind of method that guanite precipitation method process desulfurization wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789965A (en) * | 2017-10-12 | 2018-03-13 | 中石化南京工程有限公司 | A kind of ammonia magnesium combination smoke desulfurization and the method for by-product guanite |
| CN108997030A (en) * | 2018-08-24 | 2018-12-14 | 澔海科技(杭州)有限公司 | Electromagnetization ionic liquid and its preparation method |
| CN110563198A (en) * | 2019-09-04 | 2019-12-13 | 广西长润环境工程有限公司 | Chemical fertilizer wastewater treatment method and treatment equipment |
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| CN203333302U (en) * | 2013-06-13 | 2013-12-11 | 江苏远东环保工程有限公司 | Equipment system for recovering magnesium ammonium phosphate from magnesium oxide process desulfurized waste liquid |
| CN105461136A (en) * | 2015-12-09 | 2016-04-06 | 西安西热水务环保有限公司 | System and method for comprehensive treatment of wastewater of thermal power plant and recovery of chemical resources |
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2016
- 2016-12-11 CN CN201611135306.3A patent/CN106830416A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318867A (en) * | 2013-06-13 | 2013-09-25 | 江苏远东环保工程有限公司 | Method for recovering magnesium ammonium phosphate from magnesia process desulfurization waste liquid and equipment system of method |
| CN203333302U (en) * | 2013-06-13 | 2013-12-11 | 江苏远东环保工程有限公司 | Equipment system for recovering magnesium ammonium phosphate from magnesium oxide process desulfurized waste liquid |
| CN105461136A (en) * | 2015-12-09 | 2016-04-06 | 西安西热水务环保有限公司 | System and method for comprehensive treatment of wastewater of thermal power plant and recovery of chemical resources |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789965A (en) * | 2017-10-12 | 2018-03-13 | 中石化南京工程有限公司 | A kind of ammonia magnesium combination smoke desulfurization and the method for by-product guanite |
| CN108997030A (en) * | 2018-08-24 | 2018-12-14 | 澔海科技(杭州)有限公司 | Electromagnetization ionic liquid and its preparation method |
| CN108997030B (en) * | 2018-08-24 | 2019-09-03 | 澔海科技(杭州)有限公司 | Electromagnetization ionic liquid and its preparation method |
| US11312641B2 (en) | 2018-08-24 | 2022-04-26 | Howhigh Science & Technology (Hangzhou) Co., Ltd. | Electromagnetic ionic liquid and preparation method therefor |
| CN110563198A (en) * | 2019-09-04 | 2019-12-13 | 广西长润环境工程有限公司 | Chemical fertilizer wastewater treatment method and treatment equipment |
| CN110563198B (en) * | 2019-09-04 | 2022-04-01 | 广西长润环境工程有限公司 | Chemical fertilizer wastewater treatment method and treatment equipment |
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Application publication date: 20170613 |