CN204958682U - Polyformaldehyde effluent treatment plant - Google Patents
Polyformaldehyde effluent treatment plant Download PDFInfo
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- CN204958682U CN204958682U CN201520711279.4U CN201520711279U CN204958682U CN 204958682 U CN204958682 U CN 204958682U CN 201520711279 U CN201520711279 U CN 201520711279U CN 204958682 U CN204958682 U CN 204958682U
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Abstract
The utility model relates to a polyformaldehyde effluent treatment plant, polyformaldehyde processing apparatus includes from swimming over to pretreatment systems and the biochemical treatment system that low reaches feed through in proper order, pretreatment systems includes indisputable carbon reactor, type fenton reaction ware and the sedimentation tank of swimming over to low reaches on from and feeding through in proper order, the biochemical treatment system sinks the pond oxygen processing unit that becomes reconciled in, including the one -level hydrolysis -acidification pool that communicates in proper order, formaldehyde preliminary treatment pond, UASB reactor. In this application, owing to adopt the combination technology of compound materialization oxidizing process and biological method, and adopt the preliminary treatment mode that the good class fenton reaction of indisputable carbon electrode reaction combined together in the preliminary treatment stage, make follow -up biochemical treatment provide fine reaction basis, in the biochemical treatment stage, adopt the mode of processing that UASB reacts and second grade aerobic reaction combines together, the micro molecule that makes the organic matter thoroughly turns into the molecular state emission, COD value greatly reduced, basically, the fragmentary pollutant discharge to polyformaldehyde waste water has been realized.
Description
Technical field
The utility model relates to wastewater processing technology, relates to a kind of polyoxymethylene wastewater treatment equipment more specifically and applies the waste water treatment process of this device.
Background technology
At present, polyoxymethylene (POM) is applied widely in fields such as automobile, daily necessities, mechanical industries, and develops rapidly and become one of five large-engineering plastics.And along with the development of some novel industries, China is also sharply riseing to the demand of polyoxymethylene, China's methyl alcohol production capacity surplus simultaneously, development polyoxymethylene project is also being one of approach solving this present situation.Therefore, domestic construction had successively been gone into operation many polyoxymethylene enterprises in recent years, but waste water of its discharge can not meet the emission standard requirement of increasingly stringent, not only causes serious harm to ecotope, and waste great lot of water resources, implementing advanced treatment to it has been trend of the times.
The difference of molecular chain structure pressed by polyoxymethylene, is divided into acefal homopolymer (CH3CO-(CH2O) n-COCH3) and copolymerized methanal (-(CH2O) n-(CH2O-CH2-CH2) m-), belongs to hardly degraded organic substance.The pollution substance produced in polyoxymethylene explained hereafter comprises two polyoxymethylene, trioxymethylene, dioxolane, sodium formiate, methyl alcohol etc., and simultaneously due to polyreaction, have a lot of by products and generate, its waste water content has very large uncertainty.Polyoxymethylene device factory effluent contains two polyoxymethylene, trioxymethylene, dioxolane etc., be macromole Recalcitrant chemicals, common metabolic effect only by aerobic treatment in prior art is difficult to degraded completely, the COD of its correspondence is more difficult reaches emission standard requirement, therefore need to carry out the pre-treatment such as physical oxidation or acidication measure, it is made to be decomposed into low molecule organic matter, thus by biochemical degradation.
Utility model content
In view of this, the purpose of this utility model is that providing a kind of can make the macromole hard-degraded substance in polyoxymethylene waste water be processed thoroughly, and COD value is reduced greatly, substantially achieve a kind of polyoxymethylene wastewater treatment equipment and corresponding technique that the no pollution of polyoxymethylene waste water is discharged.
The utility model provides a kind of polyoxymethylene wastewater treatment equipment, it is characterized in that, comprises and is from upstream to the pretreatment system and biochemical treatment system that downstream is communicated with successively; Described pretreatment system comprises iron carbon reactor, class Fenton reactor and settling tank from above swimming over to downstream and being communicated with successively; Described biochemical treatment system comprises the one-stage hydrolysis acidification pool, formaldehyde pretreatment pool, UASB reactor, medium sediment pool and the aerobic treatment unit that are communicated with successively.
Preferably, described UASB reactor comprises sludge reaction district, gas-liquid-solid three-phase separator and air chamber.
Preferably, described aerobic treatment unit comprise be communicated with successively one-level Aerobic Pond, two-stage acidulation pond and secondary Aerobic Pond.
Preferably, described aerobic treatment unit is also provided with gas blower.
Utility model this kind of polyoxymethylene wastewater treatment equipment and apply the waste water treatment process of this device, owing to adopting the combined process of compound materialization oxidation style and biological process, and at the pretreatment mode that pretreatment stage adopts the completely reacted class Fenton's reaction of iron carbon dioxide process carbon electrode to combine, subsequent biochemical process is provided and well reacts basis, in the biochemical treatment stage, adopt the processing mode that UASB reaction and secondary aerobic reaction combine, organic small molecules is made thoroughly to be converted into molecular state discharge, through multiple process, macromole hard-degraded substance in polyoxymethylene waste water obtains and processes thoroughly, COD value reduces greatly, substantially achieve and the no pollution of polyoxymethylene waste water is discharged.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the utility model embodiment, above-mentioned and other objects of the present utility model, feature and advantage will be more clear, in the accompanying drawings:
Fig. 1 is the structural representation of polyoxymethylene wastewater treatment equipment.
Embodiment
Hereinafter with reference to accompanying drawing, various embodiment of the present utility model is described in more detail.In various figures, identical element adopts same or similar Reference numeral to represent.For the sake of clarity, the various piece in accompanying drawing is not drawn in proportion.
For convenience of explanation, in the application, along pending water flow direction, pending water flow towards side be defined as in " downstream ", the side contrary with pending water flow direction is defined as " upstream ".
As shown in Figure 1, a kind of polyoxymethylene wastewater treatment equipment, comprise and be from upstream to the pretreatment system 1 and biochemical treatment system 2 that downstream is communicated with successively, described pretreatment system 1 is for carrying out the process such as materialization and/or acidication by treatment sewage, remove part toxic pollutant and improve B/C value simultaneously, and make the hardly degraded organic substance in treatment sewage be decomposed into the low molecule organic matter that can be processed by described biological treatment system 2.
Described pretreatment system 1 comprises iron carbon reactor 11, class Fenton reactor 12 and settling tank 13 from above swimming over to downstream and being communicated with successively.
From the water in upstream regulation pond 6 in acid, by adding iron filings and active carbon powder in the waste water in described iron carbon reactor 11, due to the difference in Electrode Potential between iron and carbon, form corrosion cell in waste water, the action principle of described corrosion cell is as follows:
Anode (Fe): Fe-2e → Fe2+, E=-0.44V
Negative electrode (C) 2H
++ 2e → 2 [H] → H
2, E=0V
The product that electrode reaction generates has higher chemically reactive, on the one hand, and the Fe of the new iron surface produced and a large amount of status nascendis produced in reacting
2+with atom H, there is high chemically reactive, many organic structure and characteristics in waste water can be changed, make the effects such as organism generation chain rupture, open loop, and because iron ion has coagulation, there is a natural attraction between the sexes for contaminant particles with faint negative charge in it and waste water, forms more stable throw out (being also iron mud) and remove.
Pending waste water enters described class Fenton reactor 12 after described iron carbon reactor 11, by adding H in described class Fenton reactor 12
2o
2, the Fe that anodic reaction generates
2+can be used as the catalyzer of subsequent catalyst oxide treatment, i.e. Fe
2+with H
2o
2form Fenton-type reagent oxidation system, following reaction will occur in the reactor:
Fe
2++H
2O
2→Fe
3++OH
-+·OH
Fe
3++H
2O
2→Fe
2++HO
2·+H
+
Fe
2++·OH→OH
-+Fe
3+
RH+·OH→R·+H
2O
R·+Fe
3+→R
++Fe
2+
R
++O
2→ROO
+→…→CO
2+H
2O
Fe
2+the redox reaction participated in solution generates Fe
3+, the pH value of reaction later stage waste water raises, Fe
3+hydrolysis generates the large Fe (OH) of the polymerization degree gradually
3colloid flocculation agent, can adsorb, the pollutent condensed in water effectively, thus strengthens the decontamination effect improving to waste water.
Can be drawn by reaction above, the nascent state [H] that cathodic reaction generates can with many component generation redox reactions in waste water, destroy larger molecular organics, the organic pollutant making it change into small molecules easily to degrade.Reacted by ferrum carbon aeration, consume a large amount of hydrogen ions, the pH value of waste water is raised, for subsequent catalyst oxide treatment creates condition.Light electrolysis is combined with Fenton technique, and relative to light electrolysis, the waste water more effectively can removing complicated component particularly has more obvious advantage to CODCr, biodegradability.Compare and Fe2+ is added for Fenton reagent, not only save reagent cost, and reach the object of the treatment of wastes with processes of wastes against one another.
Described biochemical treatment system 2 comprises the one-stage hydrolysis acidification pool 21, formaldehyde pretreatment pool 22, UASB reactor 23, medium sediment pool 24 and the aerobic treatment unit 25 that are communicated with successively.
Described one-stage hydrolysis acidification pool 21 makes to be difficult to biodegradable macromolecular substance generation biocatalytic reaction in water by the enzymatic of hydrolysis bacterium, acid-producing bacteria release, is embodied in chain rupture and water-soluble.Microorganism utilizes water soluble substrate to complete biochemical reaction in born of the same parents, discharges various organic acid simultaneously.Therefore in Hydrolysis Acidification waste water, easily biodegradable organics matter reduces less, and some difficult degradation macromolecular substance are converted into the small-molecule substance being easy to degrade, thus the biodegradability of waste water and degradation speed are increased substantially.Therefore, follow-up anaerobic biological treatment can reach higher COD clearance in shorter hydraulic detention time, and makes COD reduce about 10% ~ 20%.
Described formaldehyde pretreatment pool 22 adopts anaerobic technique, is reduced the concentration of formaldehyde by anaerobic reaction principle, improves waste water biodegradable, thus improves the effect of follow-up Aerobic biological process.
Described UASB reactor 23 comprises sludge reaction district, gas-liquid-solid three-phase separator (comprising settling region) and air chamber.In reaction zone, bottom, retain a large amount of anaerobic sludge, the mud with good sedimentation function and cohesion performance forms sludge blanket in bottom.Sewage to be processed carries out mixing from the inflow of anaerobic mud bed bottom with mud sludge blanket and contacts, and the organism in the microbial decomposition sewage in mud is converted into biogas it and overflows.Complete hydrolysis in the reactor, acidifying, produce the reaction process such as acetic acid and methane phase, participate in the conversion process of substrate by different microorganisms and be final product by substrate conversion---the inorganics such as biogas, water.
Described medium sediment pool 24 for making sludge reflux from the sludge settling in the waste water of upstream under the effect of reflux pump.
Described aerobic treatment unit 25 comprise be communicated with successively one-level Aerobic Pond 251, two-stage acidulation pond 252 and secondary Aerobic Pond 253, described aerobic treatment unit 25 is also provided with gas blower 254, by this gas blower, aeration is carried out to one-level Aerobic Pond 251 and secondary Aerobic Pond 253, for aerobic biochemical reaction provides required dissolved oxygen, play again the effect to biomembranous hydraulic mixing disturbance, promote biomembranous metabolism, improve the efficiency of supply of oxygen, microorganism growth is fully contacted with sewage under favourable envrionment conditions, thus water quality is purified.
When polyoxymethylene waste water is after the treatment unit in the utility model, will through once treatment scheme:
S1, physico-chemical pretreatment
A, it is after 2.5-4.5 that waste water is processed to pH value in equalizing tank 6, enter described iron-carbon micro-electrolysis reactor 11, by adding iron filings and active carbon powder in the waste water in described iron carbon reactor 11, corrosion cell is formed in waste water, form Fe2+, the contamination particle in this ionic adsorption waste water, forms more stable throw out (being also iron mud);
B, waste water enters class Fenton reactor 12, by adding H in described class Fenton reactor 12
2o
2, the Fe in waste water
2+can be used as the catalyzer of subsequent catalyst oxide treatment, i.e. Fe
2+with H
2o
2form Fenton-type reagent oxidation system, Fe
2+the redox reaction participated in solution generates Fe
3+, the pH value of reaction later stage waste water raises, Fe
3+hydrolysis generates the large Fe (OH) of the polymerization degree gradually
3colloid flocculation agent, adsorbs, the pollutent condensed in water effectively, by above-mentioned reaction, improves B/C value and degradability;
C, waste water enters described settling tank 13, completes the precipitation to flocculate precipitate;
S2, biochemical treatment
D, waste water enters one-stage hydrolysis acidification pool 21, there is a large amount of exclusive microorganism in this pond and forms removal of carbon and nitrogen active sludge, described microorganism can be anaerobion, when in sewage and active sludge contact process, by the biochemical reaction of this kind of exclusive microorganism, the organism effectively in degradation of sewage and ammonia nitrogen, for subsequent technique is prepared;
E, waste water enters described formaldehyde pretreatment pool 22, and in formaldehyde pretreatment reaction pond, water temperature maintains 20 DEG C ~ 30 DEG C, pH should control between 6 ~ 9, is conducive to carrying out smoothly of anaerobic reaction like this, removes a large amount of concentration of formaldehyde simultaneously;
F, waste water enters described UASB reactor 23, completes organic hydrolysis in the reactor, acidifying, produce the reaction process such as acetic acid and methane phase, participate in the conversion process of substrate by different microorganisms and be final product by substrate conversion---the inorganics such as biogas, water;
G, waste water enters described medium sediment pool 24, will make sludge reflux from the sludge settling in the waste water of upstream under the effect of reflux pump.
H, waste water enters described aerobic treatment unit 25, first in described one-level Aerobic Pond 251, one-level aerobic treatment is carried out, waste water enters described secondary hydrolysis acidification pool 252 afterwards, wherein will change readily biodegradable material into by recalcitrant substance, for the methanation stage in mixing anaerobic digestive process provides matrix, improve the biodegradability of waste water, be beneficial to follow-up anaerobic and aerobic biological treatment; Waste water carries out aerobic treatment from flowing to secondary Aerobic Pond 253 after acidication process, and to remove each type organic in waste water significantly, water outlet removes active sludge or humus sludge from flowing to second pond, carries out solid-liquid separation; In this aerobic reaction process, constantly aeration is carried out to described one-level Aerobic Pond 251 and secondary Aerobic Pond 253, carry out to add fast response.
After above-mentioned treatment process, complete the process to polyoxymethylene waste water.
In the application, owing to adopting the combined process of compound materialization oxidation style and biological process, and at the pretreatment mode that pretreatment stage adopts the completely reacted class Fenton's reaction of iron carbon dioxide process carbon electrode to combine, subsequent biochemical process is provided and well reacts basis, in the biochemical treatment stage, adopt the processing mode that UASB reaction and secondary aerobic reaction combine, organic small molecules is made thoroughly to be converted into molecular state discharge, through multiple process, macromole hard-degraded substance in polyoxymethylene waste water obtains and processes thoroughly, COD value reduces greatly, substantially achieve and the no pollution of polyoxymethylene waste water is discharged.
Should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Last it is noted that obviously, above-described embodiment is only for the utility model example is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection domain of the present utility model.
Claims (4)
1. a polyoxymethylene wastewater treatment equipment, is characterized in that, comprises the pretreatment system (1) and biochemical treatment system (2) that are from upstream to downstream and are communicated with successively;
Described pretreatment system (1) comprises iron carbon reactor (11), class Fenton reactor (12) and settling tank (13) from above swimming over to downstream and being communicated with successively;
Described biochemical treatment system (2) comprises the one-stage hydrolysis acidification pool (21), formaldehyde pretreatment pool (22), UASB reactor (23), medium sediment pool (24) and the aerobic treatment unit (25) that are communicated with successively.
2. polyoxymethylene wastewater treatment equipment according to claim 1, is characterized in that, described UASB reactor (23) comprises sludge reaction district, gas-liquid-solid three-phase separator and air chamber.
3. polyoxymethylene wastewater treatment equipment according to claim 1, it is characterized in that, described aerobic treatment unit (25) comprise be communicated with successively one-level Aerobic Pond (251), two-stage acidulation pond (252) and secondary Aerobic Pond (253).
4. polyoxymethylene wastewater treatment equipment according to claim 3, is characterized in that, described aerobic treatment unit (25) is also provided with gas blower (254).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520711279.4U CN204958682U (en) | 2015-09-14 | 2015-09-14 | Polyformaldehyde effluent treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520711279.4U CN204958682U (en) | 2015-09-14 | 2015-09-14 | Polyformaldehyde effluent treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204958682U true CN204958682U (en) | 2016-01-13 |
Family
ID=55053762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520711279.4U Active CN204958682U (en) | 2015-09-14 | 2015-09-14 | Polyformaldehyde effluent treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204958682U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152483A (en) * | 2015-09-14 | 2015-12-16 | 北京万邦达环保技术股份有限公司 | Polyformaldehyde wastewater treatment device and wastewater treatment technique using device |
| CN114772871A (en) * | 2022-05-27 | 2022-07-22 | 上海中耀环保实业有限公司 | Treatment method of polyformaldehyde production wastewater |
-
2015
- 2015-09-14 CN CN201520711279.4U patent/CN204958682U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152483A (en) * | 2015-09-14 | 2015-12-16 | 北京万邦达环保技术股份有限公司 | Polyformaldehyde wastewater treatment device and wastewater treatment technique using device |
| CN114772871A (en) * | 2022-05-27 | 2022-07-22 | 上海中耀环保实业有限公司 | Treatment method of polyformaldehyde production wastewater |
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|---|---|---|---|
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| GR01 | Patent grant |