CN104828880A - Pretreatment device for DMF (dimethyl formamide)-containing wastewater - Google Patents
Pretreatment device for DMF (dimethyl formamide)-containing wastewater Download PDFInfo
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- CN104828880A CN104828880A CN201510189729.2A CN201510189729A CN104828880A CN 104828880 A CN104828880 A CN 104828880A CN 201510189729 A CN201510189729 A CN 201510189729A CN 104828880 A CN104828880 A CN 104828880A
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Abstract
The present invention discloses a pretreatment device for DMF (dimethyl formamide)-containing wastewater. The device comprises a reaction body which is of a cuboid steel structure. An unloading opening which is fixedly communicated with an unloading pipe is formed in the side wall at the lower end of the body, and a steam inlet hole is formed in the side wall at the upper end of the body. A water inlet and an alkali feeding opening are formed in the top of the body, the water inlet is fixedly communicated with the water inlet pipe, and the alkali feeding opening is fixedly communicated with an alkali feeding pipe. A plurality of air distributing pipes which are arranged in parallel are mounted on the bottom face inside the body, a steam pipeline which is perpendicularly communicated among the plurality of air distributing pipes is an integrally formed L-shaped structure comprising a section communicated with the air distributing pipes and a section parallel to the side face of the body, and the steam pipeline is communicated with the end opening of the section parallel to the side face of the body and the steam inlet hole. According to the device disclosed by the present invention, the biodegradable performance of the treated wastewater can be greatly improved, and the treated wastewater does not cause a great influence on the surrounding environment and is directly discharged into air. The treatment effect is stable, and the subsequent bio-treatment is facilitated, and the device is simple in structure and convenient to mount and operate.
Description
Technical field
The present invention relates to a kind of sewage pretreatment device, particularly relate to a kind of sewage pretreatment device containing DMF.
Background technology
DMF: Chinese name: dimethyl formamide, chemical formula:, molecular formula: C
3h
7nO, molecular weight: 73.09.
Dimethyl formamide (DMF) is that a kind of boiling point is high, zero pour is low, the excellent organic solvent of chemistry and Heat stability is good, can dissolve each other completely with multiple compounds such as water, ether, ketone, esters, have that thermostability is high, the not feature such as facile hydrolysis, therefore DMF is not easy to remove.In addition, DMF has bio-toxicity, has restraining effect to follow-up biochemical treatment, therefore all needs first to carry out pre-treatment removal DMF containing the waste water of DMF, then carries out follow-up relevant treatment.
To being remove DMF containing the main processing target of DMF Wastewater Pretreatment, reducing COD simultaneously, improving biodegradability.Domestic processing method of carrying out the removal DMF of pilot scale or practical engineering application mainly contains ultraviolet light catalyzing, supercritical water oxidation, extraction and alkaline hydrolysis etc.
1, ultraviolet light catalyzing is under a certain amount of catalyzer (as titanium dioxide) exists, and with ultraviolet light irradiation, makes the catalyzed oxidation of the organism in waste water.Ultraviolet light catalyzing method has can carry out at normal temperatures and pressures, not have secondary pollution and expense not too advantages of higher.But this method is still in conceptual phase, catalyzer is nano level titanium dioxide, and domestic being difficult to reaches such manufacture process requirement, and catalyzer also exists problems such as efficiency is low, easy in inactivation; Simultaneously owing to containing part coloured particle in waste water, light transmission is poor, and therefore the steam circle of ultraviolet is just much little, and quartz burner very easily loss, the life-span is very short.
2, supercritical water oxidation principle is the characteristic utilizing supercritical water, is that organic pollutant in waste water and oxygen fully dissolve each other and reacts in supercritical water, and is oxidized to nontoxic CO
2, H
2o and other simple micromolecular compounds.But its course of industrialization still exists some technical barriers, as reaction conditions comparatively harsh (high temperature, high pressure), equipment is perishable, is difficult to large-scale application.
3, extraction is contacted with processed water immiscible with water and that density is less than water specific organic phase, through physics or chemical action, makes former certain component be dissolved in the water be transferred to the process of organic phase by aqueous phase.CH can be used to the DMF waste water of higher concentration
2cl
2, chloroform, dichlorobenzene, benzene etc. reclaims DMF as extraction agent, but this this programme for DMF concentration not high, reclaim much larger than the economic worth of generation of the cost of DMF, and organic solvent also may cause secondary pollution.
4, alkaline hydrolysis is the metathesis process of alkali and salt (or mineral).The leaching process of to be a kind of with alkali be leaching liquid.Amide substance can be decomposed into corresponding amine and salt in strong base solution.Under the effect of alkali, DMF hydrolysis reaction equation is as follows: HCON (CH
3)
2+ OH
-→ HCOO
-+ NH (CH
3)
2, add caustic soda to containing in the waste water of DMF, make it that basic hydrolysis occurs and generate DMA and formate.With drum air, DMA is entrained with reaction system, and the formate in liquid phase directly can pass through Biochemical method.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, provide a kind of for high density DMF, operating structure is simple, can not cause large impact to surrounding environment, the sewage pretreatment device containing DMF that treatment effect is stable.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of sewage pretreatment device containing DMF, comprises the reactor body of rectangular parallelepiped steel construction;
Described bodies top has water-in and alkali dosing mouth, and described water-in is fixedly communicated with water inlet pipe, and described alkali dosing mouth is fixedly communicated with alkali chemical feed pipe;
Described body lower end sidewall has drain, and described drain is fixedly communicated with blow-down pipe, described body upper end sidewall has steam and passes into mouth;
Described body interior bottom surface is provided with the gas distribution pipe of some parallel arrangements, steam-pipe is vertically connected with between described some gas distribution pipes, what described steam-pipe was formed in one comprises and gas distribution pipe Connectivity Section and the L-type structure with body side parallel-segment, the passing into mouth with the port of body side parallel-segment with steam and be communicated with of described steam-pipe.
Further, described body bottom portion is also provided with the supporting leg of at least two, and described supporting leg one end is fixedly connected with body bottom portion, and the other end is fixedly connected with ground.
Further, described body sidewall outside is also installed with aisle, and described aisle is fixedly connected with a cat ladder upper end, and described cat ladder lower end is fixedly connected with ground.
Further, this inside and outside described all scribbles corrosion protection coating.
Beneficial effect of the present invention is as follows:
1. the present invention will be intensive into an integrated suite of equipment containing the wastewater treatment equipment of DMF, pre-treatment can be carried out for the waste water containing high density DMF, the form of separate modular is more convenient for directly selecting in water technology, the water inlet of alkali and waste water is carried out adding by water-in that reactor body has and alkali dosing mouth, pass into steam by steam-pipe simultaneously, recycle the gas distribution pipe that is communicated with steam-pipe by vapor diffusion to inside reactor, caustic soda is added like this to containing in the waste water of DMF, make it that basic hydrolysis occurs and generate DMA and formate, with drum air, DMA is entrained with reactor body, and the formate in liquid phase directly can pass through Biochemical method, the design will contain the waste water of DMF after alkaline hydrolysis process, wastewater biodegradability can improve greatly, large impact can not be caused to surrounding environment, can not reclaim, direct inorganization enters air.
2. the present invention is by the DMF in alkaline hydrolysis process waste water, and not only treatment effect is stablized, and is beneficial to the carrying out of subsequent biochemical process, and structure is simple, is convenient to installation operation.
3. body bottom portion of the present invention is also provided with the supporting leg of at least two, and body sidewall outside is also installed with aisle and cat ladder, and such design is safety in order to ensure field personnel and conveniently carries out operational observations.
4. this inside and outside of the present invention all scribbles corrosion protection coating, protects equipment, adds the work-ing life of equipment.
Accompanying drawing explanation
Fig. 1 is internal structure front view of the present invention.
Fig. 2 is internal structure side-view of the present invention.
Fig. 3 is reactor body bottom pipe structural representation of the present invention.
Fig. 4 is structure vertical view of the present invention.
Drawing reference numeral: 1, body, 2, blow-down pipe, 3, steam passes into mouth, 4, water inlet pipe, 5, alkali chemical feed pipe, 6, gas distribution pipe, 7, steam-pipe, 71, with gas distribution pipe Connectivity Section, 72, with body side parallel-segment, 8, supporting leg, 9, aisle.
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification sheets can understand other advantages of the present invention and effect easily.
As depicted in figs. 1 and 2, a kind of sewage pretreatment device containing DMF, comprises the reactor body 1 of rectangular parallelepiped steel construction.Body 1 lower end sidewall has drain, and drain is fixedly communicated with blow-down pipe 2, body 1 upper end sidewall has steam and passes into mouth 3.As shown in Figure 4, body 1 top has water-in and alkali dosing mouth, and water-in is fixedly communicated with water inlet pipe 4, and alkali dosing mouth is fixedly communicated with alkali chemical feed pipe 5.
As shown in Figure 3, body 1 inner bottom surface is provided with the gas distribution pipe 6 of some parallel arrangements, steam-pipe 7 is vertically connected with between some gas distribution pipes 6, what steam-pipe 7 was formed in one comprises and gas distribution pipe Connectivity Section 71 and the L-type structure with body side parallel-segment 72, the passing into mouth 3 with the port of body side parallel-segment 72 with steam and be communicated with of steam-pipe 7.
As to further optimization of the present invention, as shown in Figure 1, be also provided with the supporting leg 8 of at least two bottom body 1, supporting leg 8 one end is fixedly connected with bottom body 1, and the other end is fixedly connected with ground.Body 1 sidewall outside is also installed with aisle 9, and aisle 9 is fixedly connected with a cat ladder upper end, and cat ladder lower end is fixedly connected with ground.All corrosion protection coating is scribbled inside and outside body 1.
Embodiment
The water inlet pipe 4 of the high density DMF waste water of certain foodstuff additive company limited from reactor body 1 of the present invention is passed into, add alkali by alkali chemical feed pipe 5 simultaneously, pass into steam by steam-pipe 7 to heat reactor body 1 inside, utilize the gas distribution pipe 6 of reactor body 1 inside by vapor diffusion, heat under this alkaline condition, DMF and NaOH reaction during waste water to 60 DEG C, after qi exhaustion 30min, DMF decomposes completely, and the waste water removing DMF is discharged through blow-down pipe.
Draw through testing us, this sewage pretreatment device can reach 95% to the clearance of DMF.And after alkaline hydrolysis process, wastewater biodegradability can improve greatly.
Principle of design of the present invention will be intensive into an integrated suite of equipment containing the wastewater treatment equipment of DMF, pre-treatment can be carried out for the waste water containing high density DMF, the form of separate modular is more convenient for directly selecting in water technology, the water inlet of alkali and waste water is carried out adding by water-in that reactor body 1 has and alkali dosing mouth, pass into steam by steam-pipe 7 simultaneously, recycle the gas distribution pipe 6 that is communicated with steam-pipe 7 by vapor diffusion to inside reactor, caustic soda is added like this to containing in the waste water of DMF, make it that basic hydrolysis occurs and generate DMA and formate, with drum air, DMA is entrained with reactor body 1, and the formate in liquid phase directly can pass through Biochemical method.Also be provided with the supporting leg 8 of at least two bottom body 1, body 1 sidewall outside is also installed with aisle 9 and cat ladder, and such design is safety in order to ensure field personnel and conveniently carries out operational observations.All scribble corrosion protection coating inside and outside body 1, protect equipment, add the work-ing life of equipment.
The sewage pretreatment device of the present invention's design can by the waste water containing DMF after alkaline hydrolysis process, and wastewater biodegradability can improve greatly, and can not cause large impact to surrounding environment, can not reclaim, direct inorganization enters air.Not only treatment effect is stablized, and is beneficial to the carrying out of subsequent biochemical process, and structure is simple, is convenient to installation operation.
Claims (4)
1., containing a sewage pretreatment device of DMF, it is characterized in that: the reactor body comprising rectangular parallelepiped steel construction;
Described bodies top has water-in and alkali dosing mouth, and described water-in is fixedly communicated with water inlet pipe, and described alkali dosing mouth is fixedly communicated with alkali chemical feed pipe;
Described body lower end sidewall has drain, and described drain is fixedly communicated with blow-down pipe, described body upper end sidewall has steam and passes into mouth;
Described body interior bottom surface is provided with the gas distribution pipe of some parallel arrangements, steam-pipe is vertically connected with between described some gas distribution pipes, what described steam-pipe was formed in one comprises and gas distribution pipe Connectivity Section and the L-type structure with body side parallel-segment, the passing into mouth with the port of body side parallel-segment with steam and be communicated with of described steam-pipe.
2. a kind of sewage pretreatment device containing DMF according to claim 1, it is characterized in that: described body bottom portion is also provided with the supporting leg of at least two, described supporting leg one end is fixedly connected with body bottom portion, and the other end is fixedly connected with ground.
3. a kind of sewage pretreatment device containing DMF according to claim 1, is characterized in that: described body sidewall outside is also installed with aisle, and described aisle is fixedly connected with a cat ladder upper end, and described cat ladder lower end is fixedly connected with ground.
4. a kind of sewage pretreatment device containing DMF according to claim 1, is characterized in that: this inside and outside described all scribbles corrosion protection coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189729.2A CN104828880A (en) | 2015-04-21 | 2015-04-21 | Pretreatment device for DMF (dimethyl formamide)-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189729.2A CN104828880A (en) | 2015-04-21 | 2015-04-21 | Pretreatment device for DMF (dimethyl formamide)-containing wastewater |
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| CN104828880A true CN104828880A (en) | 2015-08-12 |
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ID=53807140
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| CN201510189729.2A Pending CN104828880A (en) | 2015-04-21 | 2015-04-21 | Pretreatment device for DMF (dimethyl formamide)-containing wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113666562A (en) * | 2021-09-14 | 2021-11-19 | 西安思科赛实业有限公司 | Device for removing DMF (dimethyl formamide) in red wastewater and preparation method thereof |
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Application publication date: 20150812 |
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