CN110040880A - The processing method of desulfurization wastewater - Google Patents
The processing method of desulfurization wastewater Download PDFInfo
- Publication number
- CN110040880A CN110040880A CN201910452405.1A CN201910452405A CN110040880A CN 110040880 A CN110040880 A CN 110040880A CN 201910452405 A CN201910452405 A CN 201910452405A CN 110040880 A CN110040880 A CN 110040880A
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- China
- Prior art keywords
- case
- tank
- lime
- desulfurization wastewater
- processing method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
-
- 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
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of processing methods of desulfurization wastewater.It is the following steps are included: Step 1: waste water, which sequentially enters, neutralizes case, flow tank and flocculation tanks；Step 2: waste water and coagulum that flocculation tanks come out enter clarifier, after the clarified device of waste water, a part of clear water enters water tank and is discharged, and a part of waste water enters sludge dewatering equipment by sludge delivery pump, and another part passes through in sludge circulation pumped back and case circular treatment；Step 3: the filtrate of sludge dewatering equipment discharge and the sewage self-flowing of cleaning filter cloth are to filtrate box, this part of contaminated water is sent by pumping to neutralization case and is handled, and dewatered sludge is transported outward by mud cake transport vehicle.A kind of processing method of desulfurization wastewater of the present invention, a part of clear water of sludge come out from clarifying basin enters water tank discharge, a part of sewage, which is sent back to, neutralizes case circulation, another part mud mixture enters after sludge dewatering equipment is separated by solid-liquid separation, mud cake outward transport, sewage, which enters to neutralize in case, to be handled, and wastewater treatment meets all standard.
Description
Technical field
The present invention relates to a kind of processing methods of desulfurization wastewater.Belong to technical field of waste water processing.
Background technique
Boiler factory uses wet oxidation magnesium desulfurization technology, can generate a large amount of desulfurization wastewaters daily, mainly contain in desulfurization wastewater
MgSO47H2O、MgSO3, chloride ion, suspended matter, oversaturated sulphite, the huge sum of money such as sulfate and mercury, lead, chromium, copper, lead
Belong to, wherein being much the first pollutant for requiring strict control in national environmental standard, if desulfurization wastewater is without processing
Direct outlet certainly will cause surrounding aqueous environment seriously to pollute.
The water quality characteristics of desulfurization wastewater: (1) salinity is very high in desulfurization wastewater, and dominant cation is magnesium ion, and content is high,
Contain a large amount of Cl simultaneously1-、SO3 2-、SO4 2-Anion；(2) hardness content is high in desulfurization wastewater, and predominantly sulfur removal technology is magnesium processes
Desulfurization, waste water remaining have a large amount of magnesium ion, in addition contain part calcium ion, cause water hardness higher；(3) in desulfurization wastewater
Part heavy metal ion is exceeded, with bringing into after flue gas desulfurization predominantly after coal combustion.
The processing method that Chinese invention patent discloses a kind of desulfurization wastewater (application number: 201810669395.2), is selected
Suitable flocculant, flocculant aid type, especially cooperate suitable flocculant, flocculant aid dosage, form specific desulfurization
Waste water treatment process.
Above-mentioned patent has the following problems: 1, suitable flocculant, flocculant aid type and dosage are only selected, it can not
Optimize desulfuration waste water treatment process；2, it is directly entered filter press from the sludge that clarifying basin comes out, without to isolated sewage
Circular treatment is carried out, secondary pollution is caused.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of processing methods of desulfurization wastewater.
The object of the present invention is achieved like this:
A kind of processing method of desulfurization wastewater, its main feature is that: it the following steps are included:
Step 1: waste water under the action of pump by pond sequentially enter in and case, flow tank and flocculation tanks；
The access of lime milk dosing case neutralizes case, and lime milk dosing case is to neutralize case to convey milk of lime, and milk of lime is for precipitating
Most of heavy metal；
Organic sulfur dosing tank and coagulant dosing tank access flow tank, and organic sulfur dosing tank is that flow tank conveying is organic
Sulphur, coagulant dosing tank are that flow tank conveys coagulant, and organic sulfur is concurrently biochemical by sulfur family and heavy metal ion stable bond
Reaction is learned, stable organo-metallic compound is formed, not readily dissolves, forms solid colloid in aqueous solution, solid micelle is mixed
It mutually bonds and flocks together under the action of solidifying agent；
Flocculation aid dosing tank accesses flocculation tanks, and flocculation aid dosing tank is that flocculation tanks convey flocculation aid, and flocculation aid is used for into one
Step improves cohesion and flocculating effect；
Step 2: waste water and coagulum that flocculation tanks come out enter clarifier, and after the clarified device of waste water, a part of clear water
It is discharged into water tank, a part of waste water enters sludge dewatering equipment by sludge delivery pump, and another part is followed by sludge
In ring pumped back and case circular treatment；
Step 3: the filtrate of sludge dewatering equipment discharge and the sewage self-flowing of cleaning filter cloth are to filtrate box, this part of contaminated water is logical
Cross be pumped to neutralize case handled, dewatered sludge is transported outward by mud cake transport vehicle；
The neutralization case, flow tank, flocculation tanks, clarifier and water tank water outlet echelon arrangement, form gravity stream.
Further, lime milk dosing case includes that limestone powder bin, weighing spiral feeder, milk of lime prepare case and screw rod
Delivery pump, pulverized limestone are supplied by self-unloading closed tank truck, are discharged into lime powder bin, and milk of lime is prepared in situ, the life stone in lime powder bin
Ash enters milk of lime through weighing spiral feeder and prepares case stirring, is pumped after mixing evenly by screw rod transmission to neutralization case.
Further, salt acid batch meter is arranged on water tank, and salt acid batch meter is water tank delivery industry hydrochloric acid.
Further, the cabinet material of case, flow tank, flocculation tanks, clarifier, water tank and filtrate box is neutralized as carbon steel lining
Three layers of glass flake, cabinet wall thickness is greater than 2mm.
Further, blender is provided in organic sulfur dosing tank, coagulant dosing tank and flocculation aid dosing tank.
Further, organic sulfur is 15% solution concentration.
Further, coagulant is 20% solution concentration.
Further, flocculation aid is 0.4% solution concentration.
Compared with prior art, the beneficial effects of the present invention are:
A kind of processing method of desulfurization wastewater of the present invention, after the clarified device of waste water, a part of clear water is discharged through water tank, and one
Effluent part enters sludge dewatering equipment by sludge delivery pump, and another part passes through in sludge circulation pumped back and at case circulation
Reason；To filtrate box, this part of contaminated water is sent by pumping to neutralization for the filtrate of sludge dewatering equipment discharge and the sewage self-flowing of cleaning filter cloth
Case is handled, and the mud cake of sludge dewatering equipment discharge is transported outward by mud cake transport vehicle, and after treatment, indices meet waste water
DL/T 997-2006 " thermal power plant's wet magnesium oxide desulphurization waste water quality Con trolling index ", " integrated wastewater discharge standard "
(GB8978-1996) the second class primary standard and " sewage is discharged into town sewer water standard " (GB/T31962-2015) in
In B grade standard.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the processing method of desulfurization wastewater of the present invention.
In figure:
Waste water 1 neutralizes case 2, and flow tank 3, flocculation tanks 4, clarifier 5, water tank 6, lime milk dosing case 7, organic sulfur adds
Medicine-chest 8, coagulant dosing tank 9, flocculation aid dosing tank 10, salt acid batch meter 11, sludge dewatering equipment 12, filtrate box 13, mud cake fortune
Defeated vehicle 14.
Specific embodiment
With reference to the accompanying drawings and examples, further description of the specific embodiments of the present invention.Following embodiment is only
For clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Referring to Fig. 1, the present invention relates to a kind of processing method of desulfurization wastewater, waste water 1 under the action of pump by pond successively
Into case 2, flow tank 3 and flocculation tanks 4 are neutralized, subsequently into clarifier 5 and water tank 6, the neutralization case 2, flow tank 3, wadding
Solidifying case 4, clarifier 5 and water tank 6 are discharged echelon arrangement, form gravity stream；
The access of lime milk dosing case 7 neutralizes case 2, and lime milk dosing case 7 is to neutralize case 2 to convey milk of lime；Milk of lime is used for
Precipitate most of heavy metal；
Lime milk dosing case 7 prepares case and screw-rod delivery pump including limestone powder bin, weighing spiral feeder, milk of lime,
Pulverized limestone is supplied by self-unloading closed tank truck, is discharged into lime powder bin, and milk of lime is prepared in situ, and the quick lime in lime powder bin is through spiral
Weighing feeder enters milk of lime and prepares case stirring, is pumped after mixing evenly by screw rod transmission to neutralization case 2；
Organic sulfur dosing tank 8 and coagulant dosing tank 9 access flow tank 3, and organic sulfur dosing tank 8 is the conveying of flow tank 3
Organic sulfur, organic sulfur are 15% solution concentration, and coagulant dosing tank 9 is that flow tank 3 conveys coagulant, and coagulant is 20% molten
Liquid concentration；Organic sulfur by sulfur family with heavy metal ion stable bond is concurrently biochemical reacts, form stable organometallic
Object is closed, is not readily dissolved, forms solid micelle in aqueous solution, solid micelle is mutually bonded and is gathered under the action of coagulant
Together.
Flocculation aid dosing tank 10 accesses flocculation tanks 4, and flocculation aid dosing tank 10 is that flocculation tanks 4 convey flocculation aid, and flocculation aid is
0.4% solution concentration, flocculation aid is for further improving cohesion and flocculating effect.
Salt acid batch meter 11 is arranged on water tank 6, and salt acid batch meter 11 is 6 delivery industry hydrochloric acid of water tank, using work
Industry hydrochloric acid carries out out water ph value adjustment, and water outlet PH is prevented to be higher than discharge upper limit standard.
After the clarified device 5 of waste water 1, a part of waste water enters sludge dewatering equipment 12 by sludge delivery pump, and another part is logical
It crosses in sludge circulation pumped back and 2 circular treatment of case.
For the sewage self-flowing of filtrate and cleaning filter cloth that sludge dewatering equipment 12 is discharged to filtrate box, this part of contaminated water passes through pumping
It is handled to case 2 is neutralized.
The cabinet material of case 2, flow tank 3, flocculation tanks 4, clarifier 5, water tank 6 and filtrate box 13 is neutralized as carbon steel lining
Three layers of glass flake, cabinet wall thickness is greater than 2mm.
It is provided with blender in organic sulfur dosing tank 8, coagulant dosing tank 9 and flocculation aid dosing tank 10, in blender
Under the action of, each dosing tank feeding will not card resistance.
After treatment, indices meet DL/T 997-2006 " thermal power plant's wet magnesium oxide desulphurization waste water quality to waste water
Con trolling index ", the second class primary standard in " integrated wastewater discharge standard " (GB8978-1996) and " sewage is discharged under cities and towns
Water channel water standard " B grade standard in (GB/T31962-2015).
In the above-described embodiments, exemplary description only is carried out to the present invention, but those skilled in the art are originally special in reading
The present invention can be carry out various modifications without departing from the spirit and scope of the present invention after benefit application.
Claims (8)
1. a kind of processing method of desulfurization wastewater, it is characterised in that: the processing method of desulfurization wastewater the following steps are included:
Step 1: waste water under the action of pump by pond sequentially enter in and case, flow tank and flocculation tanks；
The access of lime milk dosing case neutralizes case, and lime milk dosing case is to neutralize case to convey milk of lime, and milk of lime is for precipitating big portion
Divide heavy metal；
Organic sulfur dosing tank and coagulant dosing tank access flow tank, and organic sulfur dosing tank is that flow tank conveys organic sulfur, mix
Solidifying agent dosing tank is that flow tank conveys coagulant, and organic sulfur is concurrent biochemical anti-by sulfur family and heavy metal ion stable bond
It answers, forms stable organo-metallic compound, not readily dissolve, form solid colloid in aqueous solution, solid micelle is in coagulant
Under the action of mutually bond and flock together；
Flocculation aid dosing tank accesses flocculation tanks, and flocculation aid dosing tank is that flocculation tanks convey flocculation aid, and flocculation aid is for further changing
Kind cohesion and flocculating effect；
Step 2: waste water and coagulum that flocculation tanks come out enter clarifier, after the clarified device of waste water, a part of clear water enters
Water tank is discharged, and a part of waste water enters sludge dewatering equipment by sludge delivery pump, and another part passes through sludge circulation pump
It sends back to and neutralizes case circular treatment；
Step 3: the filtrate of sludge dewatering equipment discharge and the sewage self-flowing of cleaning filter cloth are to filtrate box, this part of contaminated water passes through pump
It send to neutralization case and is handled, dewatered sludge is transported outward by mud cake transport vehicle；
The neutralization case, flow tank, flocculation tanks, clarifier and water tank water outlet echelon arrangement, form gravity stream.
2. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that: lime milk dosing case includes stone
Lime stone powder cabin, weighing spiral feeder, milk of lime prepare case and screw-rod delivery pump, and pulverized limestone is supplied by self-unloading closed tank truck, unload
Enter lime powder bin, milk of lime is prepared in situ, and the quick lime in lime powder bin enters milk of lime through weighing spiral feeder and prepares case
Stirring is pumped by screw rod transmission to neutralization case after mixing evenly.
3. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that: the setting of salt acid batch meter is going out
On water tank, salt acid batch meter is water tank delivery industry hydrochloric acid.
4. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that: neutralize case, flow tank, flocculation
Case, clarifier, water tank and filtrate box cabinet material be that carbon steel serves as a contrast three layers of glass flake, cabinet wall thickness is greater than 2mm.
5. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that: organic sulfur dosing tank, coagulation
Blender is provided in agent dosing tank and flocculation aid dosing tank.
6. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that: organic sulfur is that 15% solution is dense
Degree.
7. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that: coagulant is that 20% solution is dense
Degree.
8. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that: flocculation aid is 0.4% solution
Concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910452405.1A CN110040880A (en) | 2019-05-28 | 2019-05-28 | The processing method of desulfurization wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910452405.1A CN110040880A (en) | 2019-05-28 | 2019-05-28 | The processing method of desulfurization wastewater |
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| CN110040880A true CN110040880A (en) | 2019-07-23 |
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| CN201910452405.1A Pending CN110040880A (en) | 2019-05-28 | 2019-05-28 | The processing method of desulfurization wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803803A (en) * | 2019-11-27 | 2020-02-18 | 阳新鹏富矿业有限公司 | Treatment agent and treatment method for wet desulphurization wastewater |
| CN112524984A (en) * | 2020-11-30 | 2021-03-19 | 中国海洋大学 | System for refrigerating and desulfurizing wastewater by using coal cinder waste heat |
| CN117228896A (en) * | 2023-11-02 | 2023-12-15 | 内蒙古电力勘测设计院有限责任公司 | Desulfurization wastewater treatment method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000317262A (en) * | 1999-05-17 | 2000-11-21 | Mitsubishi Heavy Ind Ltd | Treatment of flue gas desulfurized waste water |
| KR100743146B1 (en) * | 2006-06-05 | 2007-07-27 | 주식회사 동화엔텍 | Pretreatment Method of Desulfurization Denitrification Wastewater |
| CN103979707A (en) * | 2014-05-12 | 2014-08-13 | 武汉中和比特工程技术有限公司 | Technology for processing desulfurization wastewater |
| CN204369733U (en) * | 2014-12-24 | 2015-06-03 | 浙江蓝天求是环保股份有限公司 | A kind of flue gas desulfurization wastewater treatment system |
| CN205188014U (en) * | 2015-11-04 | 2016-04-27 | 河北大唐国际王滩发电有限责任公司 | Wet flue gas desulfurization effluent treatment plant of thermal power plant |
| CN106186438A (en) * | 2016-08-26 | 2016-12-07 | 江苏绿川环保科技有限公司 | A kind of desulfurization wastewater treatment system and technique |
-
2019
- 2019-05-28 CN CN201910452405.1A patent/CN110040880A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000317262A (en) * | 1999-05-17 | 2000-11-21 | Mitsubishi Heavy Ind Ltd | Treatment of flue gas desulfurized waste water |
| KR100743146B1 (en) * | 2006-06-05 | 2007-07-27 | 주식회사 동화엔텍 | Pretreatment Method of Desulfurization Denitrification Wastewater |
| CN103979707A (en) * | 2014-05-12 | 2014-08-13 | 武汉中和比特工程技术有限公司 | Technology for processing desulfurization wastewater |
| CN204369733U (en) * | 2014-12-24 | 2015-06-03 | 浙江蓝天求是环保股份有限公司 | A kind of flue gas desulfurization wastewater treatment system |
| CN205188014U (en) * | 2015-11-04 | 2016-04-27 | 河北大唐国际王滩发电有限责任公司 | Wet flue gas desulfurization effluent treatment plant of thermal power plant |
| CN106186438A (en) * | 2016-08-26 | 2016-12-07 | 江苏绿川环保科技有限公司 | A kind of desulfurization wastewater treatment system and technique |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803803A (en) * | 2019-11-27 | 2020-02-18 | 阳新鹏富矿业有限公司 | Treatment agent and treatment method for wet desulphurization wastewater |
| CN112524984A (en) * | 2020-11-30 | 2021-03-19 | 中国海洋大学 | System for refrigerating and desulfurizing wastewater by using coal cinder waste heat |
| CN117228896A (en) * | 2023-11-02 | 2023-12-15 | 内蒙古电力勘测设计院有限责任公司 | Desulfurization wastewater treatment method and system |
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Application publication date: 20190723 |
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