CN209567946U - DMF low-pressure distillation recycles column overhead waste water treatment system in film production - Google Patents
DMF low-pressure distillation recycles column overhead waste water treatment system in film production Download PDFInfo
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- CN209567946U CN209567946U CN201822092049.0U CN201822092049U CN209567946U CN 209567946 U CN209567946 U CN 209567946U CN 201822092049 U CN201822092049 U CN 201822092049U CN 209567946 U CN209567946 U CN 209567946U
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Abstract
DMF low-pressure distillation recycles column overhead waste water treatment system in a kind of production of film, including adjusting unit, Fenton's reaction unit, level-one coagulating sedimentation unit, UASB reaction member, catalytic oxidation unit, A/O reaction member and precipitation unit, ozone decolorization unit, the two-stage coagulation precipitation unit being sequentially communicated.The characteristics of the utility model recycles column overhead Pollutants in Wastewater ingredient for DMF low-pressure distillation in film production, precipitating removes some of the contaminants after pollutant in waste water is carried out chemical breakdown, then pollutant is further removed using biochemical method, precipitating of finally decolourizing again removal, the pollutant in waste water can be effectively removed, it is standard water discharge discharge, is the low treatment process of a kind of simple process, high treating effect, operating cost.
Description
Technical field
The utility model relates to a kind of waste water treatment system, DMF low-pressure distillation recovery tower tower in especially a kind of film production
Waste water treatment system is pushed up, the technical field of Industrial Wastewater Treatment is belonged to.
Background technique
Dimethylformamide (DMF) is important industrial chemicals and solvent, is widely used in process hides, chemical industry, medicine, agricultural
Etc. industries.DMF chemical property is stablized, and after respiratory tract and skin intrusion human body, can cause the devices such as stomach, liver, kidney, lung, angiocarpy
The injury such as official and skin and mucosa.In film production process, produce waste water largely containing DMF, in waste water containing DMF DMF it is low
Pressure multistage rectification recycling is to meet environmental protection, sustainable development using more one kind wastewater processing technology containing DMF and one kind at present
Open up desired processing technique.During low pressure multistage rectification, due to the decomposition of DMF, low-pressure distillation tower overhead water contain formic acid,
Methylamine.In addition to formic acid, methylamine, the perforating agent ethylene glycol, the methyl ether that are added in overhead water containing micro DMF and film production process.
DMF recovery tower overhead water feature are as follows: complicated component, main polluted factors COD, SS, coloration, COD are up to 30000-
50000mg/L, and there is certain fluctuation, is a kind of industrial wastewater difficult to deal with, if without processing direct emission can to by
Environment of receiving brings serious pollution.
Film production in DMF low-pressure distillation recovery tower tower top method for treating water mainly include biochemical method, physico-chemical process (absorption,
Extraction etc.), chemical method (ozone oxidation, Fenton oxidation method, supercritical water oxidation etc.) etc..Biochemical method includes anaerobism, aerobic biochemical
Processing technique, it is low in cost, but the processing time is long, and low efficiency；Physical method equipment builds investment greatly, and O&M cost is high, energy
Consume it is higher, and water outlet still have higher COD and chemical residual；Secondary pollution is easily caused when chemical Treatment overhead water.In recent years,
Country, local government lack to efforts at environmental protection pay attention to day by day, and currently for the processing for the overhead water for recycling DMF in film production
It is with strong points, simple process, the low reasonable process of high treating effect, operating cost.Develop easy to operate, high treating effect, fortune
Row high-efficient treatment method and system at low cost seem especially urgent and imperative.
Such as application number CN201120357663.0, entitled " the tower top waste water treatment system of synthetic leather recycling DMF " is open
A kind of tower top waste water treatment system of synthetic leather recycling DMF, including there are two concentration tower, a rectifying column and a water storing tank,
It further include having a de- amine tower that amine is taken off for waste water, which is equipped with waterwater entrance, de- aqueous amine outlet and dimethylamine steam
Outlet, the tower top water pot of two concentration towers and rectifying column by one buffering water pot of water pipe connection, three buffering water pots respectively by
Water pipe is connected to total water pot, which is connected to the waterwater entrance of de- amine tower by water pipe.The utility model is by by tower top
Waste water, which is buffered water pot and drains into total water pot, to be reinjected de- amine tower and carries out de- amine, it is ensured that the operating pressure of DMF recovery system is steady
It is fixed, and charging and discharging are easy to control, meanwhile, through de- amine tower, treated that de- aqueous amine can re-use, and the de- amine since treated
Water is high-temperature water, therefore after can utilizing to its residual temperature, then is emitted into water storing tank, not only energy conservation and environmental protection, but also can save high cost
Wastewater treatment expense, bring better economic benefit for enterprise.But deamination processing only is carried out to tower top waste water in this scheme, and
Other pollutant components in waste water are not removed, therefore still can not qualified discharge, it is desired nonetheless to improve.
Utility model content
The utility model is directed to the problem of working as DMF low-pressure distillation recycling column overhead wastewater treatment in cephacoria production,
It proposes in the low film production of a kind of simple process, high treating effect, operating cost at DMF low-pressure distillation recycling column overhead waste water
Reason system makes to be discharged qualified discharge after effectively removing the various pollutant components in waste water.
The utility model in order to solve the above problem used by technological means are as follows: DMF low-pressure distillation returns in a kind of production of film
Receive column overhead waste water treatment system, including be sequentially communicated adjusting unit, Fenton's reaction unit, level-one coagulating sedimentation unit,
UASB reaction member, catalytic oxidation unit, A/O reaction member and precipitation unit, ozone decolorization unit, two-stage coagulation precipitating are single
Member.
Further, Fenton unit is equipped with medicament addition device, pH monitoring device and COD monitoring device, the medicament added
For H2SO4Solution, Fe2+And H2O2。
Further, level-one coagulating sedimentation unit includes reaction zone and settling zone, and reaction zone is equipped with medicament addition device, pH
Monitoring device and diving mixing device.
Further, floated honeycomb filler is arranged in catalytic oxidation unit bottom.
Further, A/O reaction member includes the anoxic section being sequentially communicated and aerobic section, and aerobic section and anoxic section flow back
Connection.
Further, level-one coagulating sedimentation unit is directly connected to the anoxic section of A/O reaction member.
Further, ozone decolorization unit is equipped with ozone generating-device and diving mixing device.
Further, two-stage coagulation precipitation unit is divided into reaction zone and settling zone, reaction zone and settling zone volumetric ratio 1:15-
27, reaction zone is equipped with medicament addition device and diving mixing device.
The beneficial effects of the utility model are:
The characteristics of the utility model recycles column overhead Pollutants in Wastewater ingredient for DMF low-pressure distillation in film production, will
Pollutant in waste water carries out precipitating removal some of the contaminants after chemical breakdown, then using biochemical method that pollutant is further
Removal, precipitating of finally decolourizing again removal, can effectively remove the pollutant in waste water, be standard water discharge discharge, be a kind of technique
Simply, the low treatment process of high treating effect, operating cost.
Detailed description of the invention
Fig. 1 is the utility model flow diagram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Embodiment one
As shown in Figure 1, DMF low-pressure distillation recycles column overhead waste water treatment system in a kind of film production, including it is sequentially communicated
Adjusting unit, Fenton's reaction unit, level-one coagulating sedimentation unit, UASB reaction member, catalytic oxidation unit, A/O reaction it is single
Member and precipitation unit, ozone decolorization unit, two-stage coagulation precipitation unit.
Adjusting unit includes conditioning tank, and tower top waste water enters the hydraulic detention time range 6- after conditioning tank in conditioning tank
10h completely adjusts waste water, is homogenized the water quality and quantity of waste water, and stable water outlet is made to be pumped into subsequent Fenton's reaction unit.
Fenton unit is equipped with medicament addition device, pH monitoring device and COD monitoring device, and the medicament added is H2SO4It is molten
Liquid, Fe2+And H2O2.PH monitoring device and COD monitoring device are mounted in the reactive tank of Fenton unit, to the pH and COD in water
Content carries out real-time monitoring, H2SO4The dosage of solution changes in real time according to the pH value of waste water, Fe2+And H2O2Dosage according to
COD content in waste water changes in real time.Specifically, by H2SO4Solution allocation is the dilution heat of sulfuric acid of 5%-15%, by waste water
In add H2SO4Solution controls the pH value of waste water in 2-4；Fe2+For the ferrous sulfate solution of 15%-25%；H2O2For 20%-
40% hydrogen peroxide solution, the Fe added2+/H2O2Molar ratio is 1.0-2.5:1, the Fe added2+/H2O2Amount according to COD- [Fe2 +/H2O2] relation curve determine that experiment determines initial dosage before adding.The water outlet of Fenton unit enters level-one coagulating sedimentation
Unit.
Level-one coagulating sedimentation unit includes reaction zone and settling zone, reaction zone and settling zone volumetric ratio 1:12-24, reaction zone
Equipped with medicament addition device, pH monitoring device and diving mixing device.The medicament added includes basic agent and flocculant, such as
NaOH and PAM adjusts back the pH value of waste water by adding NaOH solution, when dosage is according to the fructufy of pH monitoring device
Adjustment.Specifically, NaOH is configured to 20% NaOH solution, is adjusted back by adding the pH value that Fenton's reaction is discharged by NaOH solution
To 7-8；PAM is configured to 0.2% aqueous solution, dosage range 2-4ml/L, meanwhile, waste water is carried out using diving mixing device
Stirring, so that waste water and medicament are sufficiently mixed quickening flocculation.Partition wall bottom between reaction zone and settling zone is equipped with perforation tracery wall,
Reaction zone waste water enters settling zone, the hydraulic detention time range 2-4h of settling zone by tracery wall of perforating.Level-one coagulating sedimentation list
Member water outlet enters UASB reaction member, and sludge is sent into qualified mechanism special disposal after collecting compression.
UASB reaction member includes up flow anaerobic sludge blanket reactor, and up flow anaerobic sludge blanket reactor is divided into instead
Answer area and settling zone, organic loading 3-9kgCOD/ (m3.d), available depth range 5-8m, up-flow speed should not be greater than 0.8m/
H, settling zone hydraulic surface loading range 0.3-0.8m3/(m2.h), using in up flow anaerobic sludge blanket reactor degrading waste water
Organic pollutant, the clean energy resource biogas that further increases the biodegradability of waste water, while can also generate for utilizing.UASB
Reaction member water outlet enters catalytic oxidation unit, and sludge is sent into qualified mechanism special disposal after collecting compression.
Floated honeycomb filler is arranged in catalytic oxidation unit bottom, and the filling rate range 30-50% of honeycomb filler contacts oxygen
Change unit hydraulic detention time is 4-7h, steam-water ratio 12-18:1, and the contact surface with waste water is increased by setting honeycomb filler
Product removes the organic pollutant in waste water.The water outlet of catalytic oxidation unit enters A/O reaction member.
A/O reaction member includes the anoxic section being sequentially communicated and aerobic section, and anoxic section hydraulic detention time is 2-3h, aerobic
The hydraulic detention time of section is 6-8h, aerobic section steam-water ratio range 13-18:1, and aerobic section and anoxic section flow back and be connected to, aerobic section
Mixed liquor is back to anoxic section, and reflux ratio 150-300%, being further decreased in waste water using anoxic and aerobic biochemical reaction is had
Machine pollutant and nitrogen pollutant concentration.And when lacking organic electron donors when carrying out anti-nitration reaction in anoxic section, it can will lack
The water outlet of amount level-one coagulating sedimentation unit is fed directly to anoxic section, and the water sent should be determined according to the actual conditions of anoxic section.
The water outlet of A/O reaction member enters precipitation unit and carries out mud-water separation, and precipitation unit uses vertical sedimentation basin, precipitating
Pool surface hydraulic loading range is 0.5-1.2m3/(m2.h), sedimentation time range 2-4h.The sludge being settled out compresses after collecting to be sent
To qualified mechanism special disposal, supernatant enters ozone decolorization unit.
Ozone decolorization unit is equipped with ozone generating-device and diving mixing device, supernatant waterpower in ozone decolorization unit
Residence time is not less than 30min, O in supernatant mixed liquor in reaction process3Concentration range 0.7-1.8mg/L, and stirred by diving
It mixes device to be stirred mixed liquor, be reacted so that ozone is sufficiently mixed with supernatant, remove the color species in supernatant, it will
It resolves into small-molecule substance.The water outlet of ozone decolorization unit enters two-stage coagulation precipitation unit.
Two-stage coagulation precipitation unit is divided into reaction zone and settling zone, reaction zone and settling zone volumetric ratio 1:15-27, reaction zone
Equipped with medicament addition device and diving mixing device, the medicament added is iron aluminium composite drug.Specifically, by iron aluminium composite drug
Being configured to mass fraction is 20-30% aqueous solution, and dosage is not less than 5-8ml/L respectively, and with diving mixing device to mixed liquor
It is stirred so that medicament and waste water are sufficiently mixed flocculation.The hydraulic detention time range 2.5-4.5h of settling zone, is settled out
Sludge is sent into qualified mechanism special disposal, standard water discharge discharge after collecting compression.
The utility model after carrying out water quality and quantity adjusting to tower top waste water by using Fenton's reaction to remove the portion in waste water
Divide pollutant, extra molysite and tiny suspended particulate in Fenton's reaction water outlet and removal waste water is adjusted back by coagulating sedimentation, then
Using the organic pollutant in UASB reactor degrading waste water, organic pollutant in waste water, simultaneously is removed by catalytic oxidation
By the mineralized nitrogen nitrate nitrogen in waste water, recycling A/O reaction further decreases Organic Pollutants in Wastewater and nitrogen pollutant is dense
It spends and precipitates removal, it finally will further coagulating sedimentation removes in water removal qualified discharge after tiny particles content after water outlet ozone decolorization.
Water quality and quantity is carried out to tower top waste water and adjusts the water quality and water referred to using conditioning tank homogenizing waste water, waste water is being adjusted
Save the hydraulic detention time range 6-10h in pond.Stablize after carrying out water quality and water homogenizing adjusting to waste water into subsequent reactions
Unit guarantees that subsequent processing is stablized and carries out.
Referred to using some of the contaminants in Fenton's reaction removal waste water by adding H2SO4Solution is by the pH value control of waste water
System adds Fe in 2-42+And H2O2The pollutant in waste water is removed, wherein Fe2+And H2O2Dosage is according in Fenton unit
COD variation is adjusted in real time, the Fe added2+/H2O2Molar ratio is 1.0-2.5:1.By being set in the unit of Fenton's reaction
PH monitoring device and COD monitoring device are set, adjusts H in real time2SO4Solution, Fe2+And H2O2Dosage, with for waste water water quality into
Row targetedly processing.
By coagulating sedimentation adjust back extra molysite and tiny suspended particulate in Fenton's reaction water outlet and removal waste water refer to by
Coagulative precipitation tank is divided into reaction zone and settling zone, and the pH value in basic agent readjustment water is added in reaction zone to 7-8, is added
Suspended matter in flocculant flocculation water, and agitating device, which is arranged, in reaction zone is sufficiently mixed flocculant with waste water, accelerates dirty
The flocculation for contaminating object is agglomerating；Reaction zone and settling zone volumetric ratio 1:12-24, the hydraulic detention time range 2-4h of settling zone.Pass through
PH value in pH monitoring device real-time monitoring water is set in the reaction member of coagulating sedimentation, adjusts and adds in real time further according to pH value
Basic agent, targetedly to be handled for the water quality of waste water.
Organic loading 3-9kgCOD/ (the m of UASB reactor3.d), available depth range 5-8m, up-flow speed should not be greater than
0.8m/h, settling zone hydraulic surface loading range 0.3-0.8m3/(m2.h)。
Floated honeycomb filler is set in catalytic oxidation unit bottom when catalytic oxidation removes the organic pollutant in waste water,
The filling rate range 30-50% of honeycomb filler, catalytic oxidation unit hydraulic detention time are 4-7h, steam-water ratio 12-18:1.
Anoxic section hydraulic detention time is 2-3h in A/O reaction, and the hydraulic detention time of aerobic section is 6-8h, aerobic section vapour
Water is than range 12-18:1, reflux ratio 150-300% when aerobic section mixed liquor is back to anoxic section.
If lacking organic electron donors when anoxic section denitrification, the water outlet after coagulating sedimentation is fed directly to anoxic section, is sent
Water according in anoxic section pollutant actual conditions determine.
Mud-water separation is carried out using vertical sedimentation basin when precipitating after A/O reaction, shallow lake pool surface hydraulic loading range is
0.5-1.2m3/(m2.h), sedimentation time range 2-4h.
Ozone decolorization refers to that generating color species in ozone oxidation water using ozone generating apparatus resolves into small-molecule substance,
Being stirred simultaneously using diving mixing device, which is sufficiently mixed ozone with the color species in water, reacts, wherein when ozone decolorization
Hydraulic detention time be not less than 30min, O in mixed liquor in reaction process3Concentration range 0.7-1.8mg/L.
Further coagulating sedimentation, which refers to, is divided into reaction zone and settling zone, reaction zone and settling zone volume for coagulative precipitation tank
Than 1:15-27, iron aluminium composite drug is added in reaction zone and being stirred to mixed liquor is sufficiently mixed medicament with waste water, precipitate
The hydraulic detention time range 2.5-4.5h in area.
It can be seen from above-described embodiment that the utility model is useless for DMF low-pressure distillation recycling column overhead in film production
The characteristics of water pollutant ingredient, precipitating removes some of the contaminants after the pollutant in waste water is carried out chemical breakdown, then adopts
Pollutant is further removed with biochemical method, precipitating of finally decolourizing again removal can effectively remove the pollutant in waste water, be
Standard water discharge discharge is the low treatment process of a kind of simple process, high treating effect, operating cost.
Above embodiments are only for illustration of the utility model, rather than limitations of the present invention, related technical field
Technical staff in the case where not departing from the spirit and scope of the utility model, can also make a variety of changes or convert, because
This all equivalent technical solution also should belong to the protection scope of the utility model, and the protection scope of the utility model should be by
Each claim limits.
Claims (8)
1. DMF low-pressure distillation recycles column overhead waste water treatment system in a kind of film production, it is characterised in that: including what is be sequentially communicated
Adjust unit, Fenton's reaction unit, level-one coagulating sedimentation unit, UASB reaction member, catalytic oxidation unit, A/O reaction member
With precipitation unit, ozone decolorization unit, two-stage coagulation precipitation unit.
2. DMF low-pressure distillation recycles column overhead waste water treatment system in film production as described in claim 1, it is characterised in that:
Fenton unit is equipped with medicament addition device, pH monitoring device and COD monitoring device, and the medicament added is H2SO4Solution, Fe2+With
H2O2。
3. DMF low-pressure distillation recycles column overhead waste water treatment system in film production as described in claim 1, it is characterised in that:
Level-one coagulating sedimentation unit includes reaction zone and settling zone, and reaction zone is equipped with medicament addition device, pH monitoring device and diving and stirs
Mix device.
4. DMF low-pressure distillation recycles column overhead waste water treatment system in film production as described in claim 1, it is characterised in that:
Floated honeycomb filler is arranged in catalytic oxidation unit bottom.
5. DMF low-pressure distillation recycles column overhead waste water treatment system in film production as described in claim 1, it is characterised in that:
A/O reaction member includes the anoxic section being sequentially communicated and aerobic section, and aerobic section is connected to the reflux of anoxic section.
6. DMF low-pressure distillation recycles column overhead waste water treatment system in film production as claimed in claim 5, it is characterised in that:
Level-one coagulating sedimentation unit is directly connected to the anoxic section of A/O reaction member.
7. DMF low-pressure distillation recycles column overhead waste water treatment system in film production as described in claim 1, it is characterised in that:
Ozone decolorization unit is equipped with ozone generating-device and diving mixing device.
8. DMF low-pressure distillation recycles column overhead waste water treatment system in film production as described in claim 1, it is characterised in that:
Two-stage coagulation precipitation unit is divided into reaction zone and settling zone, reaction zone and settling zone volumetric ratio 1:15-27, and reaction zone is equipped with medicament
Throwing device and diving mixing device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822092049.0U CN209567946U (en) | 2018-12-13 | 2018-12-13 | DMF low-pressure distillation recycles column overhead waste water treatment system in film production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822092049.0U CN209567946U (en) | 2018-12-13 | 2018-12-13 | DMF low-pressure distillation recycles column overhead waste water treatment system in film production |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293176A (en) * | 2018-12-13 | 2019-02-01 | 湖南大辰环保科技有限公司 | DMF low-pressure distillation recycling column overhead wastewater treatment method and system in film production |
| CN116216964A (en) * | 2021-12-02 | 2023-06-06 | 中冶长天国际工程有限责任公司 | Method and system for treating industrial wastewater in membrane production |
| CN116216964B (en) * | 2021-12-02 | 2024-07-02 | 中冶长天国际工程有限责任公司 | Method and system for treating industrial wastewater in membrane production |
-
2018
- 2018-12-13 CN CN201822092049.0U patent/CN209567946U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293176A (en) * | 2018-12-13 | 2019-02-01 | 湖南大辰环保科技有限公司 | DMF low-pressure distillation recycling column overhead wastewater treatment method and system in film production |
| CN116216964A (en) * | 2021-12-02 | 2023-06-06 | 中冶长天国际工程有限责任公司 | Method and system for treating industrial wastewater in membrane production |
| CN116216964B (en) * | 2021-12-02 | 2024-07-02 | 中冶长天国际工程有限责任公司 | Method and system for treating industrial wastewater in membrane production |
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Address after: 3 / F, building D-13, No. 1986, Taishan Road, Tianyuan District, Zhuzhou City, Hunan Province, 412007 Patentee after: Hunan Dachen environmental protection Co.,Ltd. Address before: 3 / F, building D-13, No. 1986, Taishan Road, Tianyuan District, Zhuzhou City, Hunan Province, 412007 Patentee before: HUNAN DACHEN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |