CN107792948A - A kind of sofening treatment method of lime stone gypsum wet flue gas desulfurizing waste water - Google Patents
A kind of sofening treatment method of lime stone gypsum wet flue gas desulfurizing waste water Download PDFInfo
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- CN107792948A CN107792948A CN201710041317.3A CN201710041317A CN107792948A CN 107792948 A CN107792948 A CN 107792948A CN 201710041317 A CN201710041317 A CN 201710041317A CN 107792948 A CN107792948 A CN 107792948A
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- sofening treatment
- treatment method
- flue gas
- waste water
- precipitation reaction
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
- C02F5/06—Softening water by precipitation of the hardness using calcium compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of sofening treatment method of lime stone gypsum wet flue gas desulfurizing waste water, comprise the following steps：（1）Milk of lime is added in desulfurization wastewater and carries out precipitation reaction A, controls pH value >=10 after precipitation reaction A；Then flocculation aid is added, is stood after stirring, isolates the supernatant A of waste water；（2）Flue gas is passed through in supernatant A and carries out precipitation reaction B, it is >=9 to control the pH value after precipitation reaction B, stops smoke uptake gas；Then flocculation aid is added, is stood after stirring, isolates the supernatant B of waste water, that is, completes the sofening treatment of desulfurization wastewater.The present invention efficiently solves the problem of existing desulfurization wastewater softening technology added amount of chemical is big, and reagent cost is high, and enterprise operation financial burden is big.
Description
Technical field
The present invention relates to a kind of sofening treatment method of wet desulfurization of flue gas by limestone-gypsum method waste water, belongs to water process neck
Domain.
Background technology
With the raising that people's environmental emission reduction is realized, the processing of desulfurization wastewater just becomes more and more important with recycling.
Calcium and magnesium hardness content is high in desulfurization wastewater, it is big to be fluctuated with front end flue gas desulfurization working conditions change change of water quality, to ensure successive depths
The steady and continuous operation of processing, the softening pretreatment of early stage are particularly significant.
At present, conventional typical desulfurization wastewater sofening treatment technique is sodium hydroxide+sodium carbonate method, flow such as Fig. 1 institutes
Show, the desulfurization wastewater that pH after conventional treatment is 6~9 is pumped to first order reaction pond by elevator pump, added in first order reaction pond
Enter sodium hydroxide, the effect of sodium hydroxide is the pH, OH for improving waste water-With the Mg in waste water2+Produce Mg (OH)2Precipitation, goes
Except the magnesium hardness in desulfurization wastewater.The water outlet of first order reaction pond is from flowing into first stage precipitation tank, and after separation of solid and liquid, clear liquid is from flowing into two level
Reaction tank.Sodium carbonate, CO are added in second order reaction pond3 2-With the Ca in waste water2+Produce CaCO3Precipitation, remove desulfurization wastewater
In calcium hardness.The water outlet of second order reaction pond is from second-level settling pond is flowed into, and after separation of solid and liquid, clear liquid enters subsequent process flow.One
Precipitated caused by second order reaction, be promoted to transport outward after diaphragm filter press dehydration by mud discharging pump respectively and disposed.
Such a technological process is simple to operate, is swift in response, and is a kind of ripe chemical treatment method.But the method medicament
Dosage is big, and reagent cost is high, very big financial burden is caused to run unit, while the method is continuous operation, works as front end
When change of water quality fluctuation is big, effluent quality situation not up to standard, 2 points of popularizations for constraining such a method of the above are also easily caused.
The content of the invention
It is contemplated that overcoming the bottleneck of prior art, operating cost is reduced, there is provided a kind of feasible inexpensive lime
The sofening treatment method of stone-gypsum wet flue gas desulfurizing waste water.
The technical scheme is that, there is provided a kind of sofening treatment method of wet desulfurization of flue gas by limestone-gypsum method waste water,
Comprise the following steps：
（1）Milk of lime is added in desulfurization wastewater and carries out precipitation reaction A, controls pH value >=10 after precipitation reaction A；Then add
Flocculation aid, stood after stirring, isolate the supernatant A of waste water；
（2）Flue gas is passed through in supernatant A and carries out precipitation reaction B, it is >=9 to control the pH value after precipitation reaction B, stops logical cigarette
Road gas；Then flocculation aid is added, is stood after stirring, isolates the supernatant B of waste water, that is, completes the sofening treatment of desulfurization wastewater.
Further, step（1）In, control ph 10-12, preferably 11-12.
Further, step（2）In, control ph 9-10.5, preferably 9-9.5.
Further, control the pH value after precipitation reaction A bigger 2-2.5 than the pH value after precipitation reaction B.
Further, step（1）In flocculation aid be bodied ferric sulfate and/or polyacrylamide, step（2）In help it is solidifying
Agent is bodied ferric sulfate and/or polyacrylamide.
Further, the reaction time of the precipitation reaction A is 1-1.5h, time of repose 1-1.5h.
Further, the reaction time of the precipitation reaction A is 1-2h, time of repose 1-1.5h.
Further, the step（2）In, the CO in flue gas2Content is 10-13%.
Further, the flue gas is quoted from boiler emission, flue gas after dedusting, denitration and desulfurization process.
Further, the step（2）In, the pH value after precipitation reaction B is adjusted with sodium carbonate, this regulation can be adjusted accurately
Save pH value.
Further, the pH value of the desulfurization wastewater is 6-9.
The present invention basic ideas be：Utilize two reactors：Demagging reactor and carbonization reactor, demagging reactor master
It is used to remove magnesium ion, carbonization reactor is mainly used in removing the calcium ion in calcium ion and waste water that previous step adds.
（1）It is 4~6 untreated desulfurization wastewaters by pH, or the desulfurization wastewater that pH is 6~9 after conventional treatment is as processing
Object, deliver in demagging reactor and handled, first add milk of lime into demagging reactor in chronological order during wastewater treatment
Chemical precipitation reaction is carried out, the specific chemical feeding quantity of milk of lime allows highest magnesium ion according to magnesium ion concentration in raw wastewater and water outlet
Concentration theoretical calculation determines that key is to control pH value >=10 after neutralizing；Then flocculation aid is added into demagging reactor, such as
PAM, wastewater supernatant fluid is obtained after being stood after being sufficiently stirred.
（2）By step（1）Gained wastewater supernatant fluid is sent into carbonization reactor, flue gas is passed through, using in flue gas
CO2With Ca in waste water2+Produce CaCO3Precipitation；Flue gas is passed through in waste water can cause the pH value continuous decrease of waste water, flue gas
Steam-water ratio determines that duration of ventilation determines according to pH value according to theoretical calculation, and key is to control pH value >=9 after neutralizing；Work as pH
After value reaches critical value, stop ventilation, add Na2CO3Accurate adjustment, flocculation aid, such as PAM are then added into carbonization reactor, is filled
Divide after stirring after standing and obtain wastewater supernatant fluid, that is, complete sofening treatment.
Wherein, demagging reactor is the batch tank reactor with storage bucket, and top is the container of circular belt stirrer, under
Portion is the circular storage bucket horizontal by 55 °.
Demagging reactor head is provided with waste water inlet, milk of lime inlet, coagulant/flocculation aid inlet；Waste water goes out
Water uses pontoon type decanting device, and storage bucket top is provided with annular and rinses the mouth of a river, and storage bucket bottom is provided with mud mouth, set on drain pipe
There is sample tap.
Demagging reactor head is provided with pH on-line measurement instrument, magnesium ion concentration on-line measurement instrument.
All exits and entrances valves of demagging reactor are motor-driven valve, are controlled and opened and closed according to interrelated logic.
Demagging reactor agitator is frequency conversion agitator.
Demagging reactor flushing water is using softening production water, without additional water source.
Demagging reactor production mud has fraction to be back in demagging reactor, the crystal seed as lower secondary response.
Wherein, carbonization reactor is the interval bubbling stirred tank reactor with storage bucket, and top is that circular strip side entering type stirs
The container of device is mixed, bottom is the circular storage bucket horizontal by 55 °.
Exhanst gas outlet is provided with the top of carbonization reactor, casing top is provided with waste water inlet, coagulant/flocculation aid feed liquor
Mouthful, wastewater effluent uses pontoon type decanting device, and side stir device bottom is provided with smoke inlet, and flue gas uses circulating line, more
Point adds；Store up bucket top and be provided with the annular flushing mouth of a river, storage bucket bottom is provided with mud mouth, and drain pipe is provided with sample tap.
Carbonization reactor top is provided with pH on-line measurement instrument, calcium ion concentration on-line measurement instrument.
All exits and entrances valves of carbonization reactor are motor-driven valve, are controlled and opened and closed according to interrelated logic.
Carbonization reactor agitator is frequency conversion agitator.
Carbonization reactor flushing water is using softening production water, without additional water source.
Carbonization reactor production mud has fraction to be back in carbonization reactor, the crystal seed as lower secondary response.
The carbonization reactor source of the gas quoted from boiler emission flue gas after dedusting, denitration and desulfurization process CEMS
Flue, added using cfentrifugal blower pressurization.
The device of other not deployed explanations of the present invention is commercially available and definite functions this areas conventional equipment.
With reference to principle and effect, the invention will be further described：
In terms of existing technologies, mainly demagging reactor adds medicament and is changed to lime by original sodium hydroxide the present invention
Breast, reduce reagent cost；The CO in flue gas is used in carbonization reactor2Instead of sodium carbonate, reagent cost is greatly reduced, and
And the Ca that superfluous lime breast is brought into system can be removed2+, effectively utilize the CO in flue gas2, by exhaust-gas resource.Meanwhile this
Method is reacted using batch-type, by controlling important response parameter and important effluent index, during using flexible reaction
Between with chemical feeding quantity come situation that effluent quality caused by overcoming variation water quality big is not up to standard.
Sodium hydroxide accounts for 85% in the reagent cost of sodium hydroxide+sodium carbonate method, and sodium carbonate accounts for 15%, and reagent cost
Account for total operating cost 99%；Lime+carbonizatin method uses calcium hydroxide, and usage amount is slightly less than sodium hydroxide, and same size adds
Expense is about the 26% of sodium hydroxide, and the medicament expense of sodium carbonate is ignored, comprehensive other fees, and total operating cost lime+
Carbonizatin method is about 27% or so of sodium hydroxide+sodium carbonate method.
In a word, compared with prior art, the method for the invention has the advantages that：
1st, process equipment configuration is simple, and stable operation is easy to control；
2nd, calcium and magnesium hardness in the removal waste water that can effectively stablize, the big impact of resistance to variation water quality；
3rd, the pharmaceutical quantities added are effectively reduced, substantially reduce operating cost；
4th, be derived from flue of the flue gas of boiler emission after dedusting, denitration and desulfurization process CEMS using flue gas, react
After the completion of can freely discharge, without other poisonous and harmful substances produce.
It is big that the present invention efficiently solves existing desulfurization wastewater softening technology added amount of chemical, and reagent cost is high, enterprise's fortune
The problem of row financial burden is big.
Brief description of the drawings
Fig. 1 is desulfurization wastewater sofening treatment process chart in the prior art；
Fig. 2 is the desulfurization wastewater sofening treatment process chart of the present invention；
Fig. 3 is the conventional pre-treating technology flow of desulfurization wastewater of the prior art.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
Present embodiment is applicable built desulfurization wastewater treatment system advanced treating transformation project.Wherein, the early stage of desulfurization wastewater
Processing is as shown in Figure 3.
The first step：Certain factory that pH is 6~9 is handled into desulfurization wastewater up to standard by conventional three headers to pump by elevator pump
To demagging reactor, it is 11 ~ 12 that milk of lime regulation pH is added in demagging reactor, after being sufficiently stirred 5min, except reactive magnesium
The Polyferric Sulfate that concentration is 4% is added in device（Bodied ferric sulfate）0.25mL/L and concentration are 0.05% polyacrylamide 0.2mL/L is low
Speed stirring 55min, stops stirring, waste water natural sedimentation in demagging reactor, mud-water separation.
Second step：Supernatant in demagging reactor is pumped to carbonization reactor by elevator pump, is passed through CO2Concentration is
12% ~ 13% flue gas is simultaneously sufficiently stirred, and is added to pH value and is stopped ventilation, now the calcium ion base in waste water when being 9.5 ~ 10.5
This removal, it is ensured that water outlet calcium ion concentration energy stably reaching standard.After being sufficiently stirred 5min, addition concentration is in carbonization reactor
4% bodied ferric sulfate 0.25mL/L and concentration is 0.05% polyacrylamide 0.2mL/L, stirring at low speed 55min, stops stirring
Mix, waste water natural sedimentation in carbonization reactor, mud-water separation.
3rd step：Demagging reactor discharge sludge containing magnesium is promoted to desulphurization system vacuum hydroextractor through pump, with gypsum
Dehydration outward transport.
4th step：Carbonization reactor discharges calcic sludge and is promoted to desulphurization system filtrate hole through pump, recycles.
Embodiment 2
Present embodiment is applied to newly-built desulfurization wastewater advanced treating project.
The first step：By pH be 4~6 the untreated desulfurization wastewater of certain factory pumped by elevator pump to demagging reactor, except
It is 10 ~ 10.5 that milk of lime regulation pH is added in reactive magnesium device, then adds the organic sulfur 0.3mL/L that concentration is 1% and is sufficiently stirred
After 5min, the bodied ferric sulfate 0.25mL/L that concentration is 4% and the polyacrylamide that concentration is 0.05% are added in demagging reactor
Amine 0.2mL/L, stirring at low speed 55min, stop stirring, waste water natural sedimentation in demagging reactor, mud-water separation.
Second step：Supernatant in demagging reactor is pumped to carbonization reactor by elevator pump, is passed through CO2Concentration is
12% ~ 13% flue gas is simultaneously sufficiently stirred, add to pH value be 9 ~ 9.5 when stop ventilation, now the calcium ion in waste water is basic
Remove, it is ensured that water outlet calcium ion concentration energy stably reaching standard.After being sufficiently stirred 5min, it is 4% that concentration is added in carbonization reactor
Bodied ferric sulfate 0.25mL/L and concentration be 0.05% polyacrylamide 0.2mL/L, stirring at low speed 55min, stop stirring,
Waste water natural sedimentation in carbonization reactor, mud-water separation.
3rd step：Demagging reactor discharge sludge containing magnesium is promoted to desulphurization system vacuum hydroextractor through pump, with gypsum
Dehydration outward transport.
4th step：Carbonization reactor discharges calcic sludge and is promoted to desulphurization system filtrate hole through pump, recycles.
Claims (10)
- A kind of 1. sofening treatment method of wet desulfurization of flue gas by limestone-gypsum method waste water, it is characterised in that comprise the following steps：（1）Milk of lime is added in desulfurization wastewater and carries out precipitation reaction A, controls pH value >=10 after precipitation reaction A；Then add Flocculation aid, stood after stirring, isolate the supernatant A of waste water；（2）Flue gas is passed through in supernatant A and carries out precipitation reaction B, it is >=9 to control the pH value after precipitation reaction B, stops logical cigarette Road gas；Then flocculation aid is added, is stood after stirring, isolates the supernatant B of waste water, that is, completes the sofening treatment of desulfurization wastewater.
- 2. sofening treatment method as claimed in claim 1, it is characterised in that step（1）In, control ph 10-12.
- 3. sofening treatment method as claimed in claim 1, it is characterised in that step（2）In, control ph 9-10.5.
- 4. sofening treatment method as claimed in claim 1, it is characterised in that step（1）In flocculation aid be bodied ferric sulfate And/or polyacrylamide, step（2）In flocculation aid be bodied ferric sulfate and/or polyacrylamide.
- 5. sofening treatment method as claimed in claim 1, it is characterised in that the reaction time of the precipitation reaction A is 1- 1.5h, time of repose 1-1.5h.
- 6. sofening treatment method as claimed in claim 1, it is characterised in that the reaction time of the precipitation reaction A is 1-2h, Time of repose is 1-1.5h.
- 7. sofening treatment method as claimed in claim 1, it is characterised in that the step（2）In, the CO in flue gas2Content For 10-13%.
- 8. sofening treatment method as claimed in claim 1, it is characterised in that the flue gas is quoted from boiler emission, process Flue gas after dedusting, denitration and desulfurization process.
- 9. sofening treatment method as claimed in claim 1, it is characterised in that the step（2）In, adjusted and precipitated with sodium carbonate React the pH value after B.
- 10. sofening treatment method as claimed in claim 1, it is characterised in that the pH value of the desulfurization wastewater is 6-9.
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| CN201710041317.3A CN107792948A (en) | 2017-01-20 | 2017-01-20 | A kind of sofening treatment method of lime stone gypsum wet flue gas desulfurizing waste water |
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| CN201710041317.3A CN107792948A (en) | 2017-01-20 | 2017-01-20 | A kind of sofening treatment method of lime stone gypsum wet flue gas desulfurizing waste water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373206A (en) * | 2018-05-22 | 2018-08-07 | 北京翰祺环境技术有限公司 | A kind of method and device suitable for high rigidity wastewater hardness removing |
| CN113023908A (en) * | 2021-03-18 | 2021-06-25 | 大唐环境产业集团股份有限公司 | Sequencing batch type high-magnesium-hardness desulfurization wastewater softening device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7037434B2 (en) * | 2002-12-20 | 2006-05-02 | Exxonmobil Upstream Research Company | Integrated water treatment and flue gas desulfurization process |
| CN101746874A (en) * | 2010-02-04 | 2010-06-23 | 武汉中新化工有限公司 | Processing method of wastewater desulfurized by fume wet method |
| EP2221101A1 (en) * | 2009-02-23 | 2010-08-25 | Babcock & Wilcox Power Generation Group, Inc. | System and method for softening water for use in a scrubber |
| CN105060545A (en) * | 2015-07-17 | 2015-11-18 | 西安西热水务环保有限公司 | System and method for softening treatment of desulfurization wastewater of coal-fired power plant |
| CN105565548A (en) * | 2016-02-03 | 2016-05-11 | 大唐环境产业集团股份有限公司 | Desulfurization waste water softening treatment device and method |
| CN105731683A (en) * | 2016-02-03 | 2016-07-06 | 大唐环境产业集团股份有限公司 | Treatment device and method for softening desulfurization waste water |
-
2017
- 2017-01-20 CN CN201710041317.3A patent/CN107792948A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7037434B2 (en) * | 2002-12-20 | 2006-05-02 | Exxonmobil Upstream Research Company | Integrated water treatment and flue gas desulfurization process |
| EP2221101A1 (en) * | 2009-02-23 | 2010-08-25 | Babcock & Wilcox Power Generation Group, Inc. | System and method for softening water for use in a scrubber |
| CN101746874A (en) * | 2010-02-04 | 2010-06-23 | 武汉中新化工有限公司 | Processing method of wastewater desulfurized by fume wet method |
| CN105060545A (en) * | 2015-07-17 | 2015-11-18 | 西安西热水务环保有限公司 | System and method for softening treatment of desulfurization wastewater of coal-fired power plant |
| CN105565548A (en) * | 2016-02-03 | 2016-05-11 | 大唐环境产业集团股份有限公司 | Desulfurization waste water softening treatment device and method |
| CN105731683A (en) * | 2016-02-03 | 2016-07-06 | 大唐环境产业集团股份有限公司 | Treatment device and method for softening desulfurization waste water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373206A (en) * | 2018-05-22 | 2018-08-07 | 北京翰祺环境技术有限公司 | A kind of method and device suitable for high rigidity wastewater hardness removing |
| CN113023908A (en) * | 2021-03-18 | 2021-06-25 | 大唐环境产业集团股份有限公司 | Sequencing batch type high-magnesium-hardness desulfurization wastewater softening device and method |
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Application publication date: 20180313 |