CN219136568U - Treatment system for DMF (dimethyl formamide) -containing wastewater and acid-base wastewater - Google Patents
Treatment system for DMF (dimethyl formamide) -containing wastewater and acid-base wastewater Download PDFInfo
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- CN219136568U CN219136568U CN202222530301.8U CN202222530301U CN219136568U CN 219136568 U CN219136568 U CN 219136568U CN 202222530301 U CN202222530301 U CN 202222530301U CN 219136568 U CN219136568 U CN 219136568U
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Abstract
The utility model relates to a treatment system for DMF-containing wastewater and acid-base wastewater, which comprises a pretreatment device, an anaerobic device, a two-stage integrated biochemical treatment device, an advanced treatment device, a sludge treatment device and a water outlet tank; the DMF-containing wastewater and acid-base wastewater can enter a pretreatment device, the pretreatment device, an anaerobic device, a two-stage integrated biochemical treatment device, a deep treatment device and a water outlet tank are sequentially communicated, and the water outlet tank is used for discharging the treated wastewater; the pretreatment device, the anaerobic device and the advanced treatment device are respectively communicated with the sludge treatment device, and the sludge treatment device can treat sludge generated in the pretreatment device, the anaerobic device and the advanced treatment device. This contain DMF waste water and acid-base wastewater's processing system is through preprocessing device, anaerobic unit, two-stage integration biochemical treatment device and advanced treatment device's setting, handles DMF waste water and acid-base waste water through multistage device, has realized the high-efficient treatment to DMF waste water and acid-base waste water.
Description
Technical Field
The utility model relates to the technical field of water treatment, in particular to a treatment system for DMF (dimethyl formamide) -containing wastewater and acid-base wastewater.
Background
High-end Reverse Osmosis (RO) membranes and their components produce a portion of high-concentration organic wastewater and a portion of low-concentration wastewater during the production process. The main pollutants of the high-concentration organic wastewater comprise N, N-Dimethylformamide (DMF), citric acid, sodium hydroxide, trace additives and the like, and the wastewater can be discharged after being treated. According to the requirements of the wastewater inlet water quality and the wastewater outlet water quality of enterprises, the pollutants to be removed are mainly organic matters, total nitrogen, suspended matters, total dissolved solids, acid and the like, and the strict water outlet requirement or the re-disposal requirement on residues generated in the treatment process can not be met easily by only relying on a single treatment process for the pollutants. The biochemical property of DMF wastewater is poor, the single treatment is difficult to reach the standard, the cost is high, and the common combined process is difficult to ensure the treatment effect.
At present, common treatment processes for DMF wastewater mainly comprise a combination process of rectification treatment, catalytic decomposition, stripping, biochemical treatment and the like. Although DMF recovered by rectification has certain economic value, the treatment cost per ton of water is higher and the economical efficiency is poorer. Although the catalytic decomposition process can reduce the rectification cost and the treatment cost, the catalytic decomposition reaction process is difficult to control and has poor stability. Although the stripping method is theoretically feasible, the stripping method needs to be carried out under alkaline conditions, and the pH value of the effluent needs to be adjusted by a large amount of hydrochloric acid, which is unfavorable for subsequent biochemical and recycling treatment.
Therefore, an optimized treatment process for DMF-containing wastewater and acid-base wastewater is needed to realize efficient treatment of DMF-containing wastewater and acid-base wastewater so as to reach the discharge required standard.
Disclosure of Invention
First, the technical problem to be solved
In view of the above-mentioned shortcomings and disadvantages of the prior art, the utility model provides a treatment system for DMF-containing wastewater and acid-base wastewater, which solves the technical problem of poor treatment effect of DMF-containing wastewater and acid-base wastewater.
(II) technical scheme
In order to achieve the above object, the treatment system of DMF-containing wastewater and acid-base wastewater of the present utility model comprises: the device comprises a pretreatment device, an anaerobic device, a two-stage integrated biochemical treatment device, a deep treatment device, a sludge treatment device and a water outlet tank;
the DMF-containing wastewater and acid-base wastewater can enter the pretreatment device, the anaerobic device, the two-stage integrated biochemical treatment device, the advanced treatment device and the water outlet pool are sequentially communicated, and the water outlet pool is used for discharging the treated wastewater;
the pretreatment device, the anaerobic device and the advanced treatment device are respectively communicated with the sludge treatment device, and the sludge treatment device can treat sludge generated in the pretreatment device, the anaerobic device and the advanced treatment device.
Optionally, the pretreatment device comprises an air floatation tank, an acid-base neutralization tank and an adjusting tank;
the air floatation tank and the acid-base neutralization tank are both communicated with the water inlet end of the regulating tank, the water outlet end of the regulating tank is communicated with the anaerobic device, and the air floatation tank is communicated with the sludge treatment device; the air floatation tank is used for treating the wastewater containing DMF, the acid-base neutralization tank is used for treating the acid-base wastewater so that the PH value of the wastewater is between 6 and 8, and the regulating tank is used for mixing and treating the wastewater containing DMF and the acid-base wastewater.
Optionally, the anaerobic device comprises an anaerobic reactor and an anaerobic sedimentation tank;
the water inlet end of the anaerobic reactor is communicated with the regulating tank, the water outlet end of the anaerobic reactor is communicated with the anaerobic sedimentation tank, the anaerobic sedimentation tank is communicated with the two-stage integrated biochemical treatment device, and the anaerobic sedimentation tank is communicated with the sludge treatment device; the anaerobic sedimentation tank can decompose macromolecules and refractory organic matters in the wastewater into micromolecules and easily degradable substances, and can perform mud-water separation.
Optionally, the two-stage integrated biochemical treatment device is an external membrane biochemical reaction device, and the external membrane biochemical reaction device comprises a reaction tank and ultrafiltration equipment;
one end of the reaction tank is communicated with the anaerobic sedimentation tank, the other end of the reaction tank is communicated with the ultrafiltration equipment, and the reaction tank can further decompose impurities and pollutants in the wastewater; the ultrafiltration equipment can carry out mud-water separation, the water outlet end of the ultrafiltration equipment is communicated with the advanced treatment device, and the ultrafiltration equipment is communicated with the sludge treatment device to treat separated sludge.
Optionally, the reaction tank comprises a primary denitrification tank, a primary nitrification tank, a secondary denitrification tank and a secondary nitrification tank;
the anaerobic sedimentation tank is communicated with one end of the primary denitrification tank, and the primary denitrification tank, the secondary nitrification tank and the ultrafiltration equipment are sequentially communicated.
Optionally, a tubular ultrafiltration membrane is arranged in the ultrafiltration device, the separation particle size of the tubular ultrafiltration membrane is not more than 20nm, and the pressure is not more than 6bar;
the ultrafiltration device is also connected with an ultrafiltration membrane cleaning device, and the ultrafiltration membrane cleaning device can clean sludge impurities on the tubular ultrafiltration membrane.
Optionally, the advanced treatment device comprises a Fenton oxidation tank and a coagulating sedimentation tank;
the Fenton oxidation pond is communicated with the ultrafiltration equipment, the Fenton oxidation pond is communicated with the coagulating sedimentation pond, and the advanced treatment device is communicated with the water outlet pond; the Fenton oxidation pond can treat residual organic pollutants and impurities in wastewater, the coagulating sedimentation pond can separate wastewater and sludge after reaction, and the advanced treatment device is communicated with the sludge treatment device to treat the separated sludge.
Optionally, the treatment system further comprises a sludge reflux system, wherein the sludge reflux system comprises an anaerobic sludge reflux device, a nitrifying liquid reflux device and an ultrafiltration sludge reflux device;
the sludge of the anaerobic sludge reflux device is refluxed to the anaerobic device from the anaerobic sedimentation tank;
the sludge of the nitrifying liquid reflux device is refluxed from the primary nitrifying pond to the primary denitrifying pond;
and the sludge of the ultrafiltration sludge reflux device is refluxed to the primary denitrification tank by the ultrafiltration equipment.
Optionally, the sludge treatment device comprises a sludge storage tank, a feed pump, a conditioning tank and a filter press, wherein one end of the sludge storage tank is respectively communicated with the pretreatment device, the anaerobic device and the advanced treatment device to collect sludge generated after treatment, the other end of the sludge storage tank is communicated with the conditioning tank, one end of the feed pump is communicated with the conditioning tank, the other end of the feed pump is communicated with the filter press, and the filter press can dehydrate and treat the sludge until the water content of the sludge is below 60%.
(III) beneficial effects
The utility model mainly realizes the following beneficial effects: the utility model provides a treatment system for DMF-containing wastewater and acid-base wastewater, which is characterized in that the DMF-containing wastewater and acid-base wastewater are systematically treated by a plurality of devices through the arrangement of a pretreatment device, an anaerobic device, a two-stage integrated biochemical treatment device and an advanced treatment device, and the DMF-containing wastewater and the acid-base wastewater are subjected to layer-by-layer reaction and filtration through a multi-stage device, so that the problem of poor treatment effect of a single treatment process in the prior art is avoided, and the efficient treatment of the DMF-containing wastewater and the acid-base wastewater is realized. The utility model also has the following beneficial effects:
1. according to the treatment system for the DMF wastewater and the acid-base wastewater, provided by the utility model, the DMF wastewater and the acid-base wastewater are treated efficiently by the pretreatment device, the anaerobic device, the two-stage integrated biochemical treatment device and the advanced treatment device which are arranged continuously, so that the system is stable in operation and good in effluent quality.
2. The pretreatment device is used for independently pretreating DMF wastewater and acid-base wastewater by adopting a classification and quality-separation collection mode, so that the difficulty of subsequent treatment of the DMF wastewater and the acid-base wastewater is greatly reduced.
3. The UASB anaerobic reactor adopted by the anaerobic device has high volume load and small occupied area, greatly reduces the operation cost, decomposes macromolecular and nondegradable organic pollutants into micromolecular and easily degradable substances through anaerobic hydrolysis, greatly improves the biodegradability of sewage, and is particularly suitable for treating high-concentration organic wastewater such as DMF.
4. The two-stage integrated biochemical treatment device adopts an external split MBR membrane reactor process, so that the hydraulic retention time and the complete separation of sludge age are realized, the sludge concentration is increased from 3-5 g/L to 15-30 g/L, the volume load is high, the occupied area is small, the sludge age is greatly prolonged, and the denitrification effect is remarkably improved.
5. The utility model has the advantages of strong load impact resistance, high treatment efficiency, less sludge output and low operation cost.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a treatment system for DMF wastewater and acid-base wastewater.
[ reference numerals description ]
1: an air floatation tank; 2: acid-base neutralization pond; 3: an adjusting tank; 4: an anaerobic reactor; 5: an anaerobic sedimentation tank; 6: a primary denitrification tank; 7: a primary nitrification tank; 8: a secondary denitrification tank; 9: a secondary nitrification tank; 10: an ultrafiltration device; 11: fenton oxidation pond; 12: a coagulating sedimentation tank; 13: a water outlet tank; 14: sludge treatment equipment.
Detailed Description
In order to better understand the above technical solution, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
As shown in fig. 1, the present utility model provides a treatment system for DMF-containing wastewater and acid-base wastewater, the treatment system for DMF-containing wastewater and acid-base wastewater comprising: a pretreatment device, an anaerobic device, a two-stage integrated biochemical treatment device, a deep treatment device, a sludge treatment device 14 and a water outlet tank 13; the DMF-containing wastewater and acid-base wastewater can enter a pretreatment device, the pretreatment device, an anaerobic device, a two-stage integrated biochemical treatment device, a deep treatment device and a water outlet tank 13 are sequentially communicated, and the water outlet tank 13 is used for discharging the treated wastewater; the pretreatment device, the anaerobic device and the advanced treatment device are also respectively communicated with the sludge treatment device 14, and the sludge treatment device 14 can treat sludge generated in the pretreatment device, the anaerobic device and the advanced treatment device.
In this embodiment, this treatment system that contains DMF waste water and acid-base waste water passes through preprocessing device, anaerobism device, two-stage integration biochemical treatment device, advanced treatment device and go out the primary communication setting of water basin 13 for waste water and acid-base waste water that contains DMF get into preprocessing device earlier in, remove the tiny suspended solid in the DMF waste water and carry out the neutralization to acid-base waste water in preprocessing device, make the PH value of the waste water that flows into in the next stage processing device between 6 ~ 8, and do not contain a large amount of tiny suspended solid in the waste water. The wastewater treated by the pretreatment device flows into the anaerobic device, the wastewater undergoes anaerobic hydrolysis reaction in the anaerobic device, macromolecules and refractory organic matters in the wastewater are decomposed into micromolecules and refractory substances through the anaerobic hydrolysis reaction, and solid impurities after the reaction are separated from the wastewater in the anaerobic device. The separated wastewater enters a two-stage integrated biochemical treatment device, reacts in the two-stage integrated biochemical treatment device, further decomposes residual micromolecules and easily degradable organic matters in the wastewater into nitrogen, carbon dioxide and water, absorbs and removes phosphorus carried in the wastewater, and the reacted solid impurities are separated from the wastewater in the two-stage integrated biochemical treatment device to further remove pollutants in the water body. The wastewater treated by the two-stage integrated biochemical treatment device enters a deep treatment system, residual organic matters which are difficult to degrade in the wastewater are oxidized and decomposed in the deep treatment system, and COD, suspended matters and the like in the wastewater are removed through flocculation. The wastewater treated by the pretreatment device, the anaerobic device, the two-stage integrated biochemical treatment device and the advanced treatment device finally enters the water outlet tank 13, and is discharged after reaching the discharge standard in the water outlet tank 13 through detection. The solid impurities remained in the pretreatment device, the anaerobic device, the two-stage integrated biochemical treatment device and the advanced treatment device all enter the sludge treatment device 14, and are treated by the sludge treatment device 14 after dehydration treatment and then are transported and disposed.
This contain DMF waste water and acid-base waste water's processing system passes through the setting of above-mentioned preprocessing device, anaerobism device, two-stage integration biochemical treatment device and advanced treatment unit to the multi-device systematic handles DMF waste water and acid-base waste water, has avoided the poor problem of single treatment process treatment effect among the prior art, has realized the high-efficient treatment to DMF waste water and acid-base waste water, and makes this system stable durable through multi-device combination treatment.
In a preferred embodiment, the pretreatment device comprises an air floatation tank 1, an acid-base neutralization tank 2 and a regulating tank 3; the air floatation tank 1 and the acid-base neutralization tank 2 are both communicated with the water inlet end of the regulating tank 3, the water outlet end of the regulating tank 3 is communicated with the anaerobic device, and the air floatation tank 1 is communicated with the sludge treatment device 14; the air floatation tank 1 is used for treating the wastewater containing DMF, the acid-base neutralization tank 2 is used for treating the acid-base wastewater so that the PH value of the wastewater is between 6 and 8, and the regulating tank 3 is used for mixing and treating the wastewater containing DMF and the acid-base wastewater.
In the embodiment, the pretreatment device classifies and collects the DMF-containing wastewater and the acid-base wastewater through the air floatation tank 1 and the acid-base neutralization tank 2, treats the DMF-containing wastewater in the air floatation tank 1, and adjusts the pH value of the wastewater in the acid-base neutralization tank 2. According to the pretreatment device, DMF wastewater and acid-base wastewater are treated according to classification and quality, the condition that the acid-base condition of the wastewater is not met in the reaction process of DMF wastewater is avoided, the treatment difficulty of DMF wastewater and acid-base wastewater is reduced, and the treatment efficiency is improved.
As shown in fig. 1, the anaerobic apparatus includes an anaerobic reactor 4 and an anaerobic precipitation tank 5; the water inlet end of the anaerobic reactor 4 is communicated with the regulating tank 3, the water outlet end of the anaerobic reactor 4 is communicated with the anaerobic sedimentation tank 5, the anaerobic sedimentation tank 5 is communicated with the two-stage integrated biochemical treatment device, and the anaerobic sedimentation tank 5 is communicated with the sludge treatment device 14; the anaerobic sedimentation tank 5 can decompose macromolecules and refractory organic matters in the wastewater into micromolecules and easily degradable substances, and the anaerobic sedimentation tank 5 can perform mud-water separation.
In this embodiment, the anaerobic reactor 4 is preferably a UASB anaerobic reactor 4, the volume load of the UASB anaerobic reactor 4 is high, the occupied area is small, the occupied area of a treatment system containing DMF wastewater and acid-base wastewater is reduced, the cost of the system is reduced, and macromolecules and nondegradable organic pollutants in the wastewater are decomposed into micromolecules and degradable substances through anaerobic hydrolysis by the UASB anaerobic reactor 4, so that the biodegradability of sewage is greatly improved, the UASB anaerobic reactor is particularly suitable for treating high-concentration organic wastewater containing DMF, and the wastewater treatment efficiency of the system is remarkably improved.
In a preferred embodiment, the two-stage integrated biochemical treatment device is an external membrane biochemical reaction device, and the external membrane biochemical reaction device comprises a reaction tank and an ultrafiltration device 10; one end of the reaction tank is communicated with the anaerobic sedimentation tank 5, the other end of the reaction tank is communicated with the ultrafiltration device 10, and the reaction tank can further decompose impurities and pollutants in the wastewater; the ultrafiltration apparatus 10 is capable of performing sludge-water separation, the water outlet end of the ultrafiltration apparatus 10 is communicated with a deep treatment device, and the ultrafiltration apparatus 10 is communicated with a sludge treatment device 14 to treat separated sludge. The reaction tank comprises a primary denitrification tank 6, a primary nitrification tank 7, a secondary denitrification tank 8 and a secondary nitrification tank 9; the anaerobic sedimentation tank 5 is communicated with one end of the primary denitrification tank 6, and the primary denitrification tank 6, the primary nitrification tank 7, the secondary denitrification tank 8, the secondary nitrification tank 9 and the ultrafiltration device 10 are sequentially communicated.
In the embodiment, the two-stage integrated biochemical treatment device adopts an external split membrane bioreactor process, and after the decomposition and conversion of organic pollutants are completed in the reactor through biological treatment, the solid-liquid separation of sewage is completed by utilizing the separation of an ultrafiltration membrane, so that the purification effect of the sewage is improved. The ultrafiltration device 10 arranged in the reactor can completely replace a secondary sedimentation tank and a conventional filtering and adsorbing unit in the traditional process, so that the hydraulic retention time and the sludge age are completely separated, and stable and high-quality effluent quality is obtained. And the integrated water treatment device has the advantages of short production and manufacturing period, low operation cost, low maintenance cost and long service life. In this two-stage integration biochemical treatment device, the reaction tank includes one-level denitrification tank 6, one-level nitrification tank 7, second grade denitrification tank 8 and second grade nitrification tank 9, has further strengthened the sewage treatment efficiency of the device through the setting of two-level nitrification tank and denitrification tank, has shown the waste water denitrification effect that has improved the device. The two-stage integrated biochemical treatment device realizes the complete separation of the hydraulic retention time and the sludge age by adopting the external membrane biochemical reactor, so that the sludge concentration is increased from 3-5 g/L to 15-30 g/L, the volume load is high, the occupied area is small, the sludge age is greatly prolonged, and the denitrification effect is obvious.
In a preferred embodiment, a tubular ultrafiltration membrane is arranged in the ultrafiltration device 10, the separation particle size of the tubular ultrafiltration membrane is not more than 20nm, and the pressure is not more than 6bar; the ultrafiltration device 10 is also connected with an ultrafiltration membrane cleaning apparatus which is capable of cleaning sludge impurities on the tubular ultrafiltration membrane.
In the embodiment, the tubular ultrafiltration membrane has high chemical resistance and chemical stability, the water pressure loss along the way of the wastewater flowing in the tubular ultrafiltration membrane is small, the operation cost is low, the occupied area of the tubular ultrafiltration membrane is small, the filtration precision is high, and the requirements on the working environment are low. The filter mechanism is also connected with an ultrafiltration membrane cleaning device, and the cleaning period can be specifically set according to different water quality conditions, and the cleaning period adopted in the embodiment is once a month.
As shown in fig. 1, the advanced treatment apparatus includes a Fenton oxidation tank 11 and a coagulation sedimentation tank 12; the Fenton oxidation tank 11 is communicated with the ultrafiltration device 10, the Fenton oxidation tank 11 is communicated with the coagulating sedimentation tank 12, and the advanced treatment device is communicated with the water outlet tank 13; the Fenton oxidation tank 11 can treat residual organic pollutants and impurities in the wastewater, the coagulating sedimentation tank 12 can separate the wastewater and sludge after the reaction, and the advanced treatment device is communicated with the sludge treatment device 14 to treat the separated sludge.
In this embodiment, the effluent of the two-stage integrated biochemical treatment device enters the Fenton oxidation tank 11, the organic pollutants which are remained in the wastewater and are difficult to degrade are oxidized and decomposed through the strong oxidation action of Fenton reagent, COD and suspended matters and the like in the wastewater are removed through flocculation, and then enters the coagulating sedimentation tank 12 for solid-liquid separation, and the effluent after the advanced treatment system enters the effluent tank 13 for reaching the standards and being discharged.
As shown in fig. 1, the treatment system further comprises a sludge reflux system, wherein the sludge reflux system comprises an anaerobic sludge reflux device, a nitrifying liquid reflux device and an ultrafiltration sludge reflux device; the sludge of the anaerobic sludge reflux device is refluxed to the anaerobic device from the anaerobic sedimentation tank; the sludge of the nitrifying liquid reflux device is refluxed from the primary nitrifying pond to the primary denitrifying pond; the sludge of the ultrafiltration sludge reflux device is refluxed to the primary denitrification tank by ultrafiltration equipment.
In this embodiment, the sludge of the anaerobic sludge recirculation apparatus is recirculated from the anaerobic sedimentation tank to the anaerobic reactor 4, and the recirculation of the anaerobic sludge ensures that the amount of activated sludge (i.e., the amount of microorganisms) in the anaerobic reactor 4 satisfies the demands in the anaerobic reaction process and ensures the stability of the anaerobic reaction. The sludge in the nitrifying liquid reflux device is refluxed to the first-stage denitrification tank 6 from the first-stage nitrification tank 7, denitrification reaction of denitrification is realized through the reflux of nitrifying liquid, and nitrate nitrogen generated by the reaction in the first-stage nitrification tank 7 is reduced into nitrogen in the first-stage denitrification tank 6, so that the aim of denitrification is fulfilled. The sludge in the ultrafiltration sludge reflux device is refluxed to the primary denitrification tank 6 by the ultrafiltration device 10, and the sludge reflux of the ultrafiltration device 10 ensures the quantity of activated sludge (namely microbial biomass) in the primary denitrification tank 6 and the stability of denitrification reaction. The arrangement of the sludge reflux device effectively reduces the running cost of the treatment system containing DMF wastewater and acid-base wastewater, reduces the sludge yield and enhances the treatment efficiency.
Referring to fig. 1, the sludge treatment apparatus 14 includes a sludge storage tank, a feed pump, a conditioning tank and a filter press, one end of the sludge storage tank is respectively communicated with the pretreatment apparatus, the anaerobic apparatus and the advanced treatment apparatus to collect sludge generated after treatment, the other end of the sludge storage tank is communicated with the conditioning tank, one end of the feed pump is communicated with the conditioning tank, the other end of the feed pump is communicated with the filter press, and the filter press is capable of dewatering sludge until the water content of the sludge is below 60%.
In the embodiment, the sludge storage tank mainly collects sludge impurities from the pretreatment device, the anaerobic device and the advanced treatment device after reaction, the sludge collected by the sludge storage tank is subjected to tempering by the tempering tank and then is conveyed to the filter press by the feed pump, and the filter press dehydrates the sludge to the water content of below 60% to prepare sludge cakes for outward transportation and disposal. The treatment system for the DMF-containing wastewater and the acid-base wastewater avoids the influence of biochemical residues in wastewater treatment on the surrounding environment through the arrangement of the sludge treatment device 14, is convenient for sludge treatment after wastewater treatment, and reduces the operation cost of the treatment system for the DMF-containing wastewater and the acid-base wastewater.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.
In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.
Claims (9)
1. The utility model provides a contain treatment system of DMF waste water and acid-base waste water which characterized in that, contain DMF waste water and acid-base waste water's treatment system includes: the device comprises a pretreatment device, an anaerobic device, a two-stage integrated biochemical treatment device, a deep treatment device, a sludge treatment device and a water outlet tank;
the DMF-containing wastewater and acid-base wastewater can enter the pretreatment device, the anaerobic device, the two-stage integrated biochemical treatment device, the advanced treatment device and the water outlet pool are sequentially communicated, and the water outlet pool is used for discharging the treated wastewater;
the pretreatment device, the anaerobic device and the advanced treatment device are respectively communicated with the sludge treatment device, and the sludge treatment device can treat sludge generated in the pretreatment device, the anaerobic device and the advanced treatment device.
2. The DMF containing wastewater and acid-base wastewater treatment system of claim 1, wherein the pretreatment device comprises an air floatation tank, an acid-base neutralization tank and a regulating tank;
the air floatation tank and the acid-base neutralization tank are both communicated with the water inlet end of the regulating tank, the water outlet end of the regulating tank is communicated with the anaerobic device, and the air floatation tank is communicated with the sludge treatment device; the air floatation tank is used for treating the wastewater containing DMF, the acid-base neutralization tank is used for treating the acid-base wastewater so that the PH value of the wastewater is between 6 and 8, and the regulating tank is used for mixing and treating the wastewater containing DMF and the acid-base wastewater.
3. The DMF containing wastewater and acid-base wastewater treatment system of claim 2, wherein the anaerobic apparatus comprises an anaerobic reactor and an anaerobic sedimentation tank;
the water inlet end of the anaerobic reactor is communicated with the regulating tank, the water outlet end of the anaerobic reactor is communicated with the anaerobic sedimentation tank, the anaerobic sedimentation tank is communicated with the two-stage integrated biochemical treatment device, and the anaerobic sedimentation tank is communicated with the sludge treatment device; the anaerobic sedimentation tank can decompose macromolecules and refractory organic matters in the wastewater into micromolecules and easily degradable substances, and can perform mud-water separation.
4. The DMF-containing wastewater and acid-base wastewater treatment system of claim 3, wherein the two-stage integrated biochemical treatment device is an external membrane biochemical reaction device, and the external membrane biochemical reaction device comprises a reaction tank and an ultrafiltration device;
one end of the reaction tank is communicated with the anaerobic sedimentation tank, the other end of the reaction tank is communicated with the ultrafiltration equipment, and the reaction tank can further decompose impurities and pollutants in the wastewater; the ultrafiltration equipment can carry out mud-water separation, the water outlet end of the ultrafiltration equipment is communicated with the advanced treatment device, and the ultrafiltration equipment is communicated with the sludge treatment device to treat separated sludge.
5. The treatment system of DMF-containing wastewater and acid-base wastewater of claim 4, wherein the reaction tank comprises a primary denitrification tank, a primary nitrification tank, a secondary denitrification tank, and a secondary nitrification tank;
the anaerobic sedimentation tank is communicated with one end of the primary denitrification tank, and the primary denitrification tank, the secondary nitrification tank and the ultrafiltration equipment are sequentially communicated.
6. The treatment system for DMF wastewater and acid-base wastewater as claimed in claim 4, wherein a tubular ultrafiltration membrane is arranged in the ultrafiltration device, the separation particle size of the tubular ultrafiltration membrane is not more than 20nm, and the pressure is not more than 6bar;
the ultrafiltration device is also connected with an ultrafiltration membrane cleaning device, and the ultrafiltration membrane cleaning device can clean sludge impurities on the tubular ultrafiltration membrane.
7. The DMF containing wastewater and acid-base wastewater treatment system of claim 4, wherein the advanced treatment apparatus comprises a Fenton oxidation tank and a coagulation sedimentation tank;
the Fenton oxidation pond is communicated with the ultrafiltration equipment, the Fenton oxidation pond is communicated with the coagulating sedimentation pond, and the advanced treatment device is communicated with the water outlet pond; the Fenton oxidation pond can treat residual organic pollutants and impurities in wastewater, the coagulating sedimentation pond can separate wastewater and sludge after reaction, and the advanced treatment device is communicated with the sludge treatment device to treat the separated sludge.
8. The DMF containing wastewater and acid-base wastewater treatment system of claim 5, further comprising a sludge return system comprising an anaerobic sludge return device, a nitrified liquid return device and an ultrafiltration sludge return device;
the sludge of the anaerobic sludge reflux device is refluxed to the anaerobic device from the anaerobic sedimentation tank;
the sludge of the nitrifying liquid reflux device is refluxed from the primary nitrifying pond to the primary denitrifying pond;
and the sludge of the ultrafiltration sludge reflux device is refluxed to the primary denitrification tank by the ultrafiltration equipment.
9. The treatment system of DMF-containing wastewater and acid-base wastewater of any one of claims 1-7, wherein the sludge treatment apparatus comprises a sludge storage tank, a feed pump, a conditioning tank and a filter press, one end of the sludge storage tank is respectively communicated with the pretreatment apparatus, the anaerobic apparatus and the advanced treatment apparatus to collect sludge produced after treatment, the other end of the sludge storage tank is communicated with the conditioning tank, one end of the feed pump is communicated with the conditioning tank, the other end of the feed pump is communicated with the filter press, and the filter press is capable of dewatering sludge to a water content of less than 60%.
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| CN202222530301.8U CN219136568U (en) | 2022-09-23 | 2022-09-23 | Treatment system for DMF (dimethyl formamide) -containing wastewater and acid-base wastewater |
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| CN202222530301.8U CN219136568U (en) | 2022-09-23 | 2022-09-23 | Treatment system for DMF (dimethyl formamide) -containing wastewater and acid-base wastewater |
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