CN105836972A - Treatment method and system of wastewater - Google Patents
Treatment method and system of wastewater Download PDFInfo
- Publication number
- CN105836972A CN105836972A CN201610339362.2A CN201610339362A CN105836972A CN 105836972 A CN105836972 A CN 105836972A CN 201610339362 A CN201610339362 A CN 201610339362A CN 105836972 A CN105836972 A CN 105836972A
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- Prior art keywords
- waste water
- precipitation
- cooling
- filter
- wastewater
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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
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a treatment method and system of wastewater, wherein the method comprises the following steps: cooling wastewater; adding reagents with oxidation and precipitation functions to cooled wastewater, and stirring for the first time; adding reagents with reduction and precipitation functions to wastewater which is stirred for the first time, and stirring for the second time; precipitating wastewater which is stirred by two times to separate liquid and precipitates; carrying out biochemical desulfurization and decyanation on the liquid obtained by being precipitated; performing high temperature treatment for the precipitates obtained by being precipitated to complete harmless treatment, so that the concentrations of cyanide ions and thiocyanate ions in wastewater are lowered to realize the technical effects of stabilizing the water quality of wastewater and lowering the water quality impact of wastewater for biological treatment to weaken the biological toxicity of wastewater.
Description
Technical field
The present invention relates to the technical field that waste water processes, particularly relate to processing method and the system of a kind of waste water.
Background technology
In coking field, change product multiple operation and can produce containing cyanide ion and Thiocyanate ion class waste water.Due to this
A little waste water are often sent directly to biological sewage plant operators and carry out waste water process, thus it can be processed technique and produce
Raw serious water quality impact, and then affect its effluent quality.It has been generally acknowledged that the biology based on activated sludge
The concentration of the water inlet cyanide ion processing technique not should be greater than 10mg/L.Dense when the cyanide ion in waste water
When degree exceedes this concentration for a long time, it will affect the activity of mud.When the concentration of the cyanide ion in waste water is long-term
During higher than 20mg/L, the microorganism in activated sludge process may be by being difficult to the murder by poisoning recovered.In waste water
Though the bio-toxicity of Thiocyanate ion strong not as good as cyanide ion, but cyanogen can be converted in biodegradation process
Radical ion, so that the toxicity of waste water strengthens.
For reducing the cyanide ion in this kind of waste water and the bio-toxicity of Thiocyanate ion, change and produce workshop often by this
A little wastewater collections are delivered to ammonia still and are processed.Utilize steam that waste water is carried out air lift, thus reduce in waste water
Cyanide ion and the concentration of Thiocyanate ion.But the effect processed due to ammonia still can be with environment temperature in tower
Change and produce fluctuation, therefore the waste water after partial period processes still can contain substantial amounts of cyanide ion
And Thiocyanate ion, the Wastewater Treated by Activated Sludge Process generation water quality of follow-up waste water is impacted, thus is affected by unavoidably
Its treatment effect.
Summary of the invention
The embodiment of the present invention, by providing processing method and the system of a kind of waste water, solves in prior art useless
The technical problem that in water, the concentration of cyanide ion and Thiocyanate ion is higher, it is achieved that stablize the water quality of waste water,
Reduce the water quality impact that biological treatment is produced by waste water, and then weaken the technique effect of the bio-toxicity of waste water.
Embodiments provide the processing method of a kind of waste water, including:
Waste water is carried out cooling process；
Waste water after cooling adds the reagent with oxidisability and precipitation function, and once stirs；
Waste water after described once stirring adds the reagent with reproducibility and precipitation function, and carries out two
Secondary stirring；
Waste water after described secondary agitation is carried out precipitation process, it is achieved liquid and sedimentary separation；
The liquid obtaining precipitation carries out biochemical de-sulfur decyanation process；
The sediment obtaining precipitation carries out high-temperature process, completes harmless treatment.
Further, after waste water is carried out cooling process, also include: the waste water after cooling was carried out
Filter.
Further, described to cooling after waste water filter, specifically include: by paper bag filter pair
Waste water after described cooling filters；Wherein, the pore size filter of described paper bag filter is 0.1-0.5mm
Between.
Further, the temperature of the waste water after described cooling processes is less than 35 DEG C.
Further, the reagent described in oxidisability and precipitation function is Ca (ClO)2Or Mg2ClO(OH)3H2O。
Further, the reagent described in reproducibility and precipitation function is FeSO4Or FeCl2。
Further, the described liquid obtaining precipitation carries out biochemical de-sulfur decyanation process, specifically includes: right
The liquid that described precipitation obtains carries out biodegradable process, and the desulfuration and decyanation completing waste water processes.
The processing system of a kind of waste water that the present invention provides, including: cooling system that waste water is lowered the temperature,
Mixing plant, settling apparatus, biodegradable equipment and heating device；The material output of described cooling system
Connecting with the material input of described mixing plant, the material output of described mixing plant sets with described precipitation
Standby material input connection, the fluid output port of described settling apparatus and the liquid of described biodegradable equipment
Input connects, it is achieved the biochemical de-sulfur decyanation to the liquid that precipitation obtains processes；Sinking of described settling apparatus
Shallow lake thing output connects with the material input of described heating device, it is achieved the sedimentary height obtaining precipitation
Temperature processes.
Further, the most at least include: filter plant；The material output of described cooling system and described mistake
The material input connection of filter equipment, the material output of described filter plant and the material of described mixing plant
Input connects.
Further, described filter plant is paper bag filter, and the pore size filter of described paper bag filter is
Between 0.1-0.5mm.
The one or more technical schemes provided in the embodiment of the present invention, at least have the following technical effect that or excellent
Point:
1, first waste water is carried out cooling process, it is simple to the dissolved oil in waste water is converted into oil slick and heavy oil,
Be conducive to follow-up oil removal treatment.Recycling has the reagent of oxidisability and precipitation function to the sulphur cyanogen in waste water
Radical ion and cyanide ion carry out oxidation processes, and Thiocyanate ion and cyanide ion are oxidized to nitrogen and sulphur generation
Sulfate ion.Followed by have the reagent of reproducibility and precipitation function to the thiosulfate anion in waste water with
The reagent with oxidisability and precipitation function of excess carry out precipitation process, it is achieved liquid and sedimentary point
From.The liquid finally obtained precipitation carries out biochemical de-sulfur decyanation process, and the sediment obtaining precipitation is carried out
High-temperature process, completes harmless treatment, thus reduces the concentration of Cyanide in Waste Water radical ion and Thiocyanate ion,
Achieve the water quality of stable waste water, reduce the water quality impact that biological treatment is produced by waste water, and then weaken waste water
The technique effect of bio-toxicity.
2, utilize paper bag filter that waste water carries out filtering oil removal treatment, thus reduce oily substance to heavy
The impact of the effect of settling of shallow lake thing, and then ensure that water treatment effect.
Accompanying drawing explanation
The flow chart of the processing method of the waste water that Fig. 1 provides for the embodiment of the present invention；
The structured flowchart of the processing system of the waste water that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention, by providing processing method and the system of a kind of waste water, solves in prior art useless
The technical problem that in water, the concentration of cyanide ion and Thiocyanate ion is higher, it is achieved that stablize the water quality of waste water,
Reduce the water quality impact that biological treatment is produced by waste water, and then weaken the technique effect of the bio-toxicity of waste water.
Technical scheme in the embodiment of the present invention is for solving above-mentioned technical problem, and general thought is as follows:
First waste water is carried out cooling process, it is simple to the dissolved oil in waste water is converted into oil slick and heavy oil, favorably
In follow-up oil removal treatment.Recycling have the reagent of oxidisability and precipitation function to the thiocyanate in waste water from
Son and cyanide ion carry out oxidation processes, and Thiocyanate ion and cyanide ion are oxidized to nitrogen and thiosulfuric acid
Radical ion.Followed by there is the reagent of reproducibility and precipitation function to the thiosulfate anion in waste water and excess
The reagent with oxidisability and precipitation function carry out precipitation process, it is achieved liquid and sedimentary separation.
The liquid finally obtained precipitation carries out biochemical de-sulfur decyanation process, and the sediment obtaining precipitation carries out high temperature
Process, complete harmless treatment, thus reduce the concentration of Cyanide in Waste Water radical ion and Thiocyanate ion, real
Show the water quality of stable waste water, reduced the water quality impact that biological treatment is produced by waste water, and then weaken waste water
The technique effect of bio-toxicity.
In order to be more fully understood that technique scheme, below in conjunction with Figure of description and concrete embodiment party
Technique scheme is described in detail by formula.
See Fig. 1, the processing method of the waste water that the embodiment of the present invention provides, including:
Step S110: waste water is carried out cooling process；
In the present embodiment, the temperature of the waste water after cooling processes is less than 35 DEG C.
Step S120: add the reagent with oxidisability and precipitation function in the waste water after cooling, and carry out
Once stir；
In the present embodiment, the reagent with oxidisability and precipitation function is Ca (ClO)2Or Mg2ClO(OH)3H2O。
Step S130: add the reagent with reproducibility and precipitation function in the waste water after once stirring, and
Carry out secondary agitation；
In the present embodiment, the reagent with reproducibility and precipitation function is FeSO4Or FeCl2。
Step S140: the waste water after secondary agitation is carried out precipitation process, it is achieved liquid and sedimentary point
From；
Step S150: the liquid obtaining precipitation carries out biochemical de-sulfur decyanation process；
Being specifically described this step, the liquid obtaining precipitation carries out biodegradable process, completes to give up
The desulfuration and decyanation of water processes.
Step S160: the sediment obtaining precipitation carries out high-temperature process, completes harmless treatment.
This step is specifically described, utilizes high temperature that the cyanide in sediment is converted into carbon dioxide
And nitrogen oxides, it is achieved harmless treatment.
In the present embodiment, in order to reduce the oily substance impact on sedimentary effect of settling, and then ensure
Water treatment effect, after waste water is carried out cooling process, also includes: carried out the waste water after cooling
Filter.
Specifically, by paper bag filter, the waste water after cooling is filtered；Wherein, paper bag filter
Pore size filter is between 0.1-0.5mm.
See Fig. 2, the processing system of the waste water that the embodiment of the present invention provides, including: waste water is lowered the temperature
Cooling system, mixing plant, settling apparatus, biodegradable equipment and heating device；The thing of cooling system
Material output connects with the material input of mixing plant, the material output of mixing plant and settling apparatus
Material input connects, and the fluid output port of settling apparatus connects with the fluid input port of biodegradable equipment,
Realize the biochemical de-sulfur decyanation of the liquid that precipitation obtains is processed；The sediment output of settling apparatus and intensification
The material input connection of equipment, it is achieved the sedimentary high-temperature process that precipitation is obtained.
In the present embodiment, cooling system is heat exchanger, and mixing plant includes stirring mixing pit and agitator,
Settling apparatus is inclined-plate clarifying basin, and heating device is coke oven.
The structure of the embodiment of the present invention is further described, the most at least includes: filter plant；Cooling sets
Standby material output connects with the material input of filter plant, the material output of filter plant and stirring
The material input connection of equipment.
In the present embodiment, filter plant is paper bag filter, and the pore size filter of paper bag filter is
Between 0.1-0.5mm.
Embodiment one
The process that distilled ammonia wastewater is processed by the system provided by the embodiment of the present invention (wherein, has oxygen
The reagent of the property changed and precipitation function is Ca (ClO)2, the reagent with reproducibility and precipitation function is FeSO4)
Including:
1, the waste water after ammonia still process is through two pipeline heat exchanger coolings less than 35 DEG C, and heat exchanger two-way medium respectively follows
Ring water and distilled ammonia wastewater.
2, the waste water after process 1 being processed filters through paper bag filter, and paper bag pore size filter is chosen as 0.1
-0.5mm。
3, stirring mixing pit in process 2 process after waste water by solid-to-liquid ratio 1:200-1:300 put into 0.1
The Ca (ClO) of mm particle diameter2, the mixing speed of agitator is 20-80r/min, and mixing time is 20-30min.
4, in same stirring pool to process 3 processed waste water by liquid liquor ratio be 1:50-1:80 put into
FeSO4Solution (substance withdrawl syndrome is 1-2mol/L), the mixing speed of agitator is 20-40r/min,
Mixing time is 10-20min.
5, the waste water centrifugal pumping after process 4 being processed is to inclined-plate clarifying basin, and swash plate height is 1-1.5m,
Oblique angle is 45 °, and hydraulic detention time is 20-30min.Swash plate sinking pool effluent uses the water outlet of sawtooth weir, weir
High ratio is higher than pond height 0.15m.Sawtooth angle is 90 °.
6, the waste water centrifugal pumping after process 5 being processed to biodegradable equipment carries out biodegradable, complete
The desulfuration and decyanation becoming distilled ammonia wastewater processes.
7, sediment in process 5 inclined-plate clarifying basin being delivered to coal yard, coal blending processes, and utilizes coke oven high temperature complete
Become the harmless treatment of cyanide.
Embodiment two
The process that distilled ammonia wastewater is processed by the system provided by the embodiment of the present invention (wherein, has oxygen
The reagent of the property changed and precipitation function is Mg2ClO(OH)3H2O, has the reagent of reproducibility and precipitation function
For FeCl2) including:
1, the waste water after ammonia still process is through two pipeline heat exchanger coolings less than 35 DEG C, and heat exchanger two-way medium respectively follows
Ring water and distilled ammonia wastewater.
2, the waste water after process 1 being processed filters through paper bag filter, and paper bag pore size filter is chosen as 0.1
-0.5mm。
3, stirring mixing pit in process 2 process after waste water by solid-to-liquid ratio 1:250-1:350 put into 0.1
The Mg of mm particle diameter2ClO(OH)3H2O, the mixing speed of agitator is 30-65r/min, mixing time
For 20-30min.
4, in same stirring pool to process 3 processed waste water by liquid liquor ratio be 1:50-1:70 put into
FeCl2Solution (substance withdrawl syndrome is 2-3mol/L), the mixing speed of agitator is 20-40r/min,
Mixing time is 10-20min.
5, the waste water centrifugal pumping after process 4 being processed is to inclined-plate clarifying basin, and swash plate height is 1-1.5m,
Oblique angle is 45 °, and hydraulic detention time is 20-30min.Swash plate sinking pool effluent uses the water outlet of sawtooth weir, weir
High ratio is higher than pond height 0.15m.Sawtooth angle is 90 °.
6, the waste water centrifugal pumping after process 5 being processed to biodegradable equipment carries out biodegradable, complete
The desulfuration and decyanation becoming distilled ammonia wastewater processes.
7, sediment in process 5 inclined-plate clarifying basin being delivered to coal yard, coal blending processes, and utilizes coke oven high temperature complete
Become the harmless treatment of cyanide.
[technique effect]
1, first waste water is carried out cooling process, it is simple to the dissolved oil in waste water is converted into oil slick and heavy oil,
Be conducive to follow-up oil removal treatment.Recycling has the reagent of oxidisability and precipitation function to the sulphur cyanogen in waste water
Radical ion and cyanide ion carry out oxidation processes, and Thiocyanate ion and cyanide ion are oxidized to nitrogen and sulphur generation
Sulfate ion.Followed by have the reagent of reproducibility and precipitation function to the thiosulfate anion in waste water with
The reagent with oxidisability and precipitation function of excess carry out precipitation process, it is achieved liquid and sedimentary point
From.The liquid finally obtained precipitation carries out biochemical de-sulfur decyanation process, and the sediment obtaining precipitation is carried out
High-temperature process, completes harmless treatment, thus reduces the concentration of Cyanide in Waste Water radical ion and Thiocyanate ion,
Achieve the water quality of stable waste water, reduce the water quality impact that biological treatment is produced by waste water, and then weaken waste water
The technique effect of bio-toxicity.
2, utilize paper bag filter that waste water carries out filtering oil removal treatment, thus reduce oily substance to heavy
The impact of the effect of settling of shallow lake thing, and then ensure that water treatment effect.
At present, the embodiment of the present invention completes pilot plant test in laboratory, and achieves good result.If using
In production, the cost of distilled ammonia wastewater pretreatment is only 0.5 yuan/t, market other be 1.5 with type reagent cost
Unit/t, thus the embodiment of the present invention also has advantage with low cost.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. the processing method of a waste water, it is characterised in that including:
Waste water is carried out cooling process；
Waste water after cooling adds the reagent with oxidisability and precipitation function, and once stirs；
Waste water after described once stirring adds the reagent with reproducibility and precipitation function, and carries out two
Secondary stirring；
Waste water after described secondary agitation is carried out precipitation process, it is achieved liquid and sedimentary separation；
The liquid obtaining precipitation carries out biochemical de-sulfur decyanation process；
The sediment obtaining precipitation carries out high-temperature process, completes harmless treatment.
2. the method for claim 1, it is characterised in that after waste water is carried out cooling process,
Also include: the waste water after cooling is filtered.
3. method as claimed in claim 2, it is characterised in that described waste water after cooling was carried out
Filter, is specifically included: filtered the waste water after described cooling by paper bag filter；Wherein, described paper
The pore size filter of bag type filter is between 0.1-0.5mm.
4. the method for claim 1, it is characterised in that the waste water after described cooling process
Temperature is less than 35 DEG C.
5. the method for claim 1, it is characterised in that described in there is oxidisability and precipitation function
Reagent be Ca (ClO)2Or Mg2ClO(OH)3H2O。
6. the method for claim 1, it is characterised in that described in there is reproducibility and precipitation function
Reagent be FeSO4Or FeCl2。
7. the method as according to any one of claim 1-6, it is characterised in that described precipitation is obtained
Liquid carry out biochemical de-sulfur decyanation process, specifically include: the liquid obtaining described precipitation carries out biological fall
Solution processes, and the desulfuration and decyanation completing waste water processes.
8. the processing system of a waste water, it is characterised in that including: the cooling lowering the temperature waste water sets
Standby, mixing plant, settling apparatus, biodegradable equipment and heating device；The material of described cooling system is defeated
Going out end to connect with the material input of described mixing plant, the material output of described mixing plant is heavy with described
The material input connection of shallow lake equipment, the fluid output port of described settling apparatus and described biodegradable equipment
Fluid input port connects, it is achieved the biochemical de-sulfur decyanation to the liquid that precipitation obtains processes；Described settling apparatus
Sediment output connect with the material input of described heating device, it is achieved to the sediment that obtains of precipitation
High-temperature process.
9. system as claimed in claim 8, it is characterised in that the most at least include: filter plant；Institute
The material input of the material output and described filter plant of stating cooling system connects, described filter plant
Material output connects with the material input of described mixing plant.
10. system as claimed in claim 9, it is characterised in that described filter plant is paper bag filter,
And the pore size filter of described paper bag filter is between 0.1-0.5mm.
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| CN201610339362.2A CN105836972A (en) | 2016-05-20 | 2016-05-20 | Treatment method and system of wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339362.2A CN105836972A (en) | 2016-05-20 | 2016-05-20 | Treatment method and system of wastewater |
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| CN105836972A true CN105836972A (en) | 2016-08-10 |
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ID=56592993
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1955120A (en) * | 2006-10-20 | 2007-05-02 | 南京九思高科技有限公司 | Process for treating desulfurization waste liquid of desulfurization decyanogen process of coke factory |
| CN102267769A (en) * | 2010-06-04 | 2011-12-07 | 中国科学院过程工程研究所 | Vacuum potassium carbonate method for utilizing coke oven coal gas desulphurization and decyanation waste liquid as resource |
| CN103253796A (en) * | 2013-06-04 | 2013-08-21 | 长春黄金研究院 | Method for processing waste water containing cyanide, thiocyanogen and heavy metal |
| CN104609645A (en) * | 2014-12-17 | 2015-05-13 | 武汉钢铁(集团)公司 | Coking vacuum potash desulfurization waste solution desulfurization and decyanation pretreatment method and device |
-
2016
- 2016-05-20 CN CN201610339362.2A patent/CN105836972A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1955120A (en) * | 2006-10-20 | 2007-05-02 | 南京九思高科技有限公司 | Process for treating desulfurization waste liquid of desulfurization decyanogen process of coke factory |
| CN102267769A (en) * | 2010-06-04 | 2011-12-07 | 中国科学院过程工程研究所 | Vacuum potassium carbonate method for utilizing coke oven coal gas desulphurization and decyanation waste liquid as resource |
| CN103253796A (en) * | 2013-06-04 | 2013-08-21 | 长春黄金研究院 | Method for processing waste water containing cyanide, thiocyanogen and heavy metal |
| CN104609645A (en) * | 2014-12-17 | 2015-05-13 | 武汉钢铁(集团)公司 | Coking vacuum potash desulfurization waste solution desulfurization and decyanation pretreatment method and device |
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Effective date of registration: 20170718 Address after: 430080 Qingshan District stock company of Hubei, Wuhan Province Applicant after: Wuhan iron and Steel Company Limited Address before: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Applicant before: WUHAN IRON AND STEEL CORPORATION |
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Application publication date: 20160810 |