CN214571379U - Fuel cell production wastewater treatment system - Google Patents
Fuel cell production wastewater treatment system Download PDFInfo
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- CN214571379U CN214571379U CN202120008490.5U CN202120008490U CN214571379U CN 214571379 U CN214571379 U CN 214571379U CN 202120008490 U CN202120008490 U CN 202120008490U CN 214571379 U CN214571379 U CN 214571379U
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 24
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Abstract
The utility model discloses a fuel cell waste water treatment system includes: the regulating tank is connected with an upstream production wastewater pipe network through a wastewater pipe, and is respectively connected with a sulfuric acid pipe and a sodium hydroxide pipe; the regulating tank is at least provided with a liquid level meter and a pH meter; an inlet is connected with a lift pump of the regulating tank through a pipeline; a contact oxidation pond connected with the outlet of the lift pump; a membrane tank connected with the contact oxidation tank for solid-liquid separation, wherein a membrane bioreactor is arranged in the membrane tank; and the clear liquid separated by the membrane tank enters the clear water tank. The utility model discloses can have higher clearance to containing ethylene glycol waste water, go out the water quality of water and be good, investment and working costs are all lower.
Description
Technical Field
The utility model relates to a fuel cell waste water treatment system.
Background
The waste water containing glycol cleaning and the like is generated in the production process of the automobile fuel cell, the B/C ratio of the glycol waste water is 0.3, the waste water is basically biodegradable waste water, and the quality of inlet water in the production process is as follows:
| name of waste water | pH | CODcr(mg/L) | Ammonia nitrogen (mg/L) | Total phosphorus (mg/L) | SS(mg/L) | |
| 1 | Ethylene glycol wastewater | 5.88 | 506 | 0.504 | 0.38 | 35 |
| 2 | Titanium plate cleaning water | 5.73 | 538 | 0.658 | 0.27 | 42 |
| 3 | Graphite plate cleaning water | 5.11 | 1160 | 0.721 | 0.63 | 43 |
| 4 | Mixed waste water | 5.5～6 | 800 (valuation) | <1 | <1 | <100 |
The quality of treated effluent water needs to meet the three-level standard shown in the table in the Integrated wastewater discharge Standard of Shanghai city (DB31/199 and 2018).
| Contaminants | pH | CODcr(mg/L) | Ammonia nitrogen (mg/L) | Total phosphorus (mg/L) | SS(mg/L) |
| Limit value | 6～9 | 500 | 45 | 8 | 400 |
There is a need in the art to develop equipment for the treatment of wastewater from fuel cell production.
Disclosure of Invention
The utility model aims at solving the problems and providing a fuel cell production wastewater treatment system, which can have higher removal rate for wastewater containing glycol, has good effluent quality and lower investment and operating cost.
The purpose of the utility model is realized like this:
the utility model discloses a fuel cell waste water treatment system includes:
the regulating tank is connected with an upstream production wastewater pipe network through a wastewater pipe, and is respectively connected with a sulfuric acid pipe and a sodium hydroxide pipe; the regulating tank is at least provided with a liquid level meter and a pH meter;
an inlet is connected with a lift pump of the regulating tank through a pipeline;
a contact oxidation pond connected with the outlet of the lift pump through a pipeline;
a membrane tank connected with the contact oxidant for solid-liquid separation, wherein a membrane bioreactor is arranged in the membrane tank; and
and the clear liquid separated by the membrane tank enters the clear water tank.
The contact oxidation pond in the fuel cell production wastewater treatment system is internally provided with the filler which is a combined filler, the combined filler comprises a filler disc made of polyethylene and a soft filler, and the soft filler is made of vinylon fiber yarns.
The size of the discs of the filler in the fuel cell production wastewater treatment system is 10cm, and the longitudinal distance between adjacent discs of the filler is 3-6 cm.
The contact oxidation pond in the fuel cell production wastewater treatment system is also provided with an aeration fan and a plurality of aerators connected with the aeration fan, the aerators are microporous aerators made of ABS material, the model is BQ-215-0.3 phi 215, and the working area of each set of aerator is as follows: 0.2 to 0.4m2。
The area of the middle membrane pool of the fuel cell production wastewater treatment system is 60-80 m2The MBR membrane of hollow fiber membrane of (1).
A backwashing pump is arranged between the clean water tank and the membrane tank in the fuel cell production wastewater treatment system.
The contact oxidation tank, the membrane tank and the clean water tank in the fuel cell production wastewater treatment system form a carbon steel water treatment integrated device.
The inside and the outside of the water treatment integrated equipment in the fuel cell production wastewater treatment system are provided with epoxy asphalt anticorrosive coatings.
A filler bracket for placing fillers is arranged in the contact oxidation pond in the fuel cell production wastewater treatment system.
The filler support in the fuel cell production wastewater treatment system adopts deformed steel bar with the diameter of 10-12 mm, and the surface of the filler support is also provided with an epoxy asphalt anticorrosive coating.
The utility model discloses a biological contact oxidation + MBR membrane treatment process can have higher clearance to containing ethylene glycol waste water, and it is good to go out water quality of water, and investment and working costs are all lower, through the utility model discloses the waste water of handling far surpasss water quality standard.
Drawings
FIG. 1 is a schematic structural diagram of a wastewater treatment system for fuel cell production.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, a system for treating wastewater from fuel cell production according to the present invention is shown, which comprises:
a regulating reservoir 1 connected with an upstream production wastewater pipe network through a wastewater pipe 11, a sulfuric acid pipe 12 and a sodium hydroxide pipe 13; it also comprises a liquid level meter 14 and a pH meter 15;
the inlet of the lift pump 2 is connected with the adjusting tank 1 through a pipeline;
a contact oxidation pond 3 connected with the outlet of the lift pump 2 through a pipeline;
a membrane tank 4 connected with the contact oxidation tank 3 for solid-liquid separation, wherein a membrane bioreactor 41 is arranged in the membrane tank 4; and
a clean water tank 5, and the clean liquid separated by the membrane tank 4 enters the clean water tank 5.
In this embodiment;
the pH value of the adjusting tank 1 is adjusted by adopting acid and alkali, the acid adopts sulfuric acid, the preparation concentration is 1.5%, the pure drug dosage is 3KG, and the preparation volume is 200L; the alkali is sodium hydroxide, and the preparation concentration is 1.5%. The pure medicine dose is 3KG, and the preparation volume is 200L;
the contact oxidation tank 3 is internally provided with a filler 31, the filler 31 is a combined filler, the combined filler comprises a polyethylene filler disc and a soft filler, the soft filler adopts vinylon fiber yarns, the diameter of each filler disc is 10cm, the longitudinal distance between every two adjacent filler discs is 3-6 cm, the contact oxidation tank 3 is provided with an aeration fan (not shown in the figure) and an aerator 32 connected with the aeration fan, and the aeration fan is a high-pressure fan with the power of 0.75 KW; the aerator is a microporous aerator made of ABS material, the model is BQ-215-0.3 phi 215, the working area is as follows: 0.3m2A/sleeve.
The membrane tank 4 has an area of 60-80 m2The MBR membrane of the hollow fiber membrane is subjected to backwashing and regular dosing cleaning, and sodium hydroxide and sodium hypochlorite are adopted as dosing cleaning agents, wherein the concentration of the sodium hydroxide is 50mg/L, and the concentration of the sodium hypochlorite is 100 mg/L. Sodium hydroxide and sodium hypochlorite are added into a clean water tank 5 and then pumped into a membrane tank 4 through a backwashing pump 51, and the membrane tank is soaked for 20 minutes. The membrane tank 4 is connected with sludgeThe pump (not shown in the figure), the mud concentration in the membrane tank 4 can rise gradually, when the mud concentration in the membrane tank 4 exceeds 8000mg/L, carry out the mud of arranging through the sludge pump, discharge the mud into the vat, the outward transport is handled after air-drying.
The contact oxidation pond 3, the membrane pond 4 and the clean water pond 5 jointly form a water treatment integrated device made of carbon steel, and epoxy asphalt anticorrosive coatings (not shown in the figure) are arranged inside and outside the water treatment integrated device and are used for reinforcement treatment. A filler support (not shown in the figure) for placing fillers is arranged in the contact oxidation pond 3, the filler support is made of deformed steel bars with the diameter of 10-12 mm, and an epoxy asphalt anticorrosive coating is also arranged on the surface of the filler support.
In the use of the utility model, three strands of production wastewater (containing glycol cleaning wastewater, titanium plate cleaning wastewater and graphite plate cleaning wastewater) are collected by a pipe network and then flow into the adjusting tank 1, the water quality and the water quantity are adjusted, and the pH is adjusted to be neutral by adding acid or alkali; then the wastewater enters the water treatment integrated equipment, is aerobically treated by the contact oxidation tank 3, degrades organic matters and the like in the wastewater by using metabolism of microorganisms, enters the membrane tank 4 for biological reaction, further degrades COD in the wastewater, intercepts most suspended matters, activated sludge and the like by filtering, and discharges the obtained clean effluent into the clean water tank 5 to ensure that the wastewater reaches the standard and is discharged.
The utility model discloses carry out aerobic biological treatment in well contact oxidation pond 3, be the effect through good oxygen fungus cut the organic substance in the waste water by a wide margin, get rid of COD's in the waste water main process through this technology, also be the most important link of waste water up to standard in-process. The utility model discloses well contact oxidation pond 3, characteristics set up the filler in contact oxidation pond 3, and 3 bottoms of the pool aeration in contact oxidation pond oxygenate sewage to make 3 cell bodies in the contact oxidation pond sewage be in the mobile state, with the abundant contact of filler in guaranteeing sewage and sewage, avoid having sewage and the uneven defect of filler contact among the contact oxidation pond 3. The basic principle of purifying waste water is the same as that of a common biomembrane method, and the biomembrane is used for adsorbing organic matters in the waste water, so that the organic matters are oxidized and decomposed by microorganisms under the aerobic condition, and the waste water is purified. A large amount of combined fillers are arranged in the contact oxidation tank 3, and due to the huge specific surface area of the fillers, microorganisms can be attached to the carriers of the fillers, so that the advantages of a biofilm method and an activated sludge method are achieved, and the contact oxidation process can achieve the effect of an activated sludge process for 8 hours only by 0.5-1.0 hour.
The organic matter is subjected to biological contact oxidation in the contact oxidation tank 3, the zoogloea on the filler is removed, and the zoogloea in a suspension state can also have a removing effect on the organic matter. The concentration of the intercepted sludge in the membrane tank 4 is very high, the sludge retention time is long, and the undegradable organic matters which cannot be degraded and cannot be removed by contact oxidation can be further removed, so that the concentration of the organic matters in the effluent of the membrane tank 4 is very low, and the COD is lower than 50 mg/L.
The Membrane tank 4 and a Membrane Bioreactor (MBR) are biochemical reaction systems that integrate Membrane separation technology and biodegradation of the bioreactor. It uses ultrafiltration or microfiltration membrane component to replace the sedimentation tank in the traditional activated sludge process to realize sludge-water separation. The system has the characteristics of strong treatment capacity, high solid-liquid separation efficiency, good effluent quality, small occupied space, simple operation management and the like. At present, MBR technology plays a great role in water resource recycling, and the MBR technology is used for treating domestic sewage and industrial wastewater, which becomes a trend. Especially in the occasions requiring high standard discharge or reuse, the method becomes the preferred process. In the membrane bioreactor, a membrane component (comprising a hollow fiber membrane or a flat membrane and the like) is immersed in a membrane pool 4, and the aperture of the membrane with the micron size of 10-1 can completely prevent bacteria from passing through, so that zoogloea and free bacteria are all kept in the membrane pool 4, and only filtered water is collected into a water collecting pipe to be discharged, so that mud-water separation is achieved, a secondary sedimentation tank is not required to be arranged, various suspended particles, bacteria, algae, turbidity, COD (chemical oxygen demand) and organic matters are effectively removed, and the excellent effluent quality with the effluent suspended matters close to zero is ensured. Because of the nearly one hundred percent strain isolation effect of the microfiltration membrane, the activated biological sludge can be kept from loss and flows back to the aerobic zone through the sludge, so that the impact load resistance capability of the aeration tank is improved, the load capacity of the aeration tank is improved, the required volume of the aeration tank is reduced to a certain extent, and the civil engineering investment of a biochemical system is reduced.
The MBR membrane has the following advantages:
(1) high pollutant removing rate and good effluent quality
MBR can be used for treating high-concentration and difficult-to-degrade organic industrial wastewater, and can also be used for purifying domestic sewage and general industrial wastewater. In MBR, the membrane module has quite good interception effect on microorganisms in a reaction tank, particularly on nitrifying and denitrifying bacteria with long generation period and microorganisms existing in small sludge particles; and due to the existence of the membrane, the activated sludge in the MBR system can reach (MLSS) 8000-15000mg/L which is far higher than that of the traditional activated sludge method (about 3000-4000mg/L), the pollutant removal efficiency is high, the quality of treated effluent is good, the removal efficiency of suspended matters (SS) and organic matters is high, the suspended matters (SS) and turbidity of the effluent can be close to zero, and bacteria, viruses and the like can be removed to be used as a sewage advanced treatment and resource technology. Based on the high-efficiency biological reaction and the good separation and interception effects of the membrane, the removal rates of COD, BOD and SS of the membrane bioreactor can reach 95%, 98% and 99% respectively, and the effluent of the membrane bioreactor can be directly reused as reclaimed water.
(2) Strong adaptability to load change and impact load resistance
The membrane bioreactor can completely intercept activated sludge due to the high-efficiency interception function of the membrane, so that the concentration of the sludge in the reactor is very high, the complete separation of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT) in the reactor is realized, and even if the water inflow is suddenly increased, the biological properties in the whole reactor can be kept in a relatively stable state; meanwhile, the adsorption effect of the activated sludge is enhanced due to the increase of the concentration of the sludge; moreover, under the interception effect of the membrane, the pollutants which are not degraded by the organisms can not be discharged along with the effluent. Based on the above points, the operation control of the whole reactor can be more flexible and stable. Therefore, the membrane bioreactor system overcomes the problems of sludge expansion and the like in the traditional water treatment process when the hydraulic load and the organic load of the system are changed.
(3) The discharge amount of sludge is small
The membrane bioreactor water treatment technology can be used as an important technology for sludge reduction and an effective means for avoiding the difficult problem of treatment of a large amount of excess sludge in a conventional sewage plant besides being used as a sewage advanced treatment and resource technology. The membrane bioreactor has small sludge discharge amount, and even can not produce sludge. Sludge self-degradation and sludge hydrolysis can reduce the efficiency of traditional water treatment systems, but are very beneficial to membrane biological reaction systems. The traditional activated sludge method usually adopts activated sludge from the end of a stabilization period to the beginning of a decay period, and because of high sludge concentration in a membrane bioreactor, organic matters are consumed in large quantity, and meanwhile, a part of microorganisms in the decay period are metabolized and decomposed by self endogenous respiration, so that the low concentration of effluent pollutants is maintained, and the residual quantity in the sludge growth process is consumed. The membrane separation enables macromolecular refractory substances in the sewage to have enough retention time in the membrane bioreactor with limited volume, and the degradation efficiency of the refractory substances is greatly improved. The reactor operates under the conditions of high volume load, low sludge load and long sludge age, and can completely realize no sludge discharge or small sludge discharge amount, little residual sludge discharge amount and even no sludge production in a longer period (such as 6 months or longer).
(4) Short technological process, simple and compact system equipment, and less land occupation
Because the membrane bioreactor does not need to generate flocs in an aerobic sludge system for sludge-water separation of a secondary sedimentation tank, the sludge concentration in the bioreactor can be much higher than that of the traditional process, and the biochemical reaction rate is related to the reactant concentration. The higher the reactant concentration is, the higher the reaction rate is, so the volume load of the membrane bioreactor can reach 5 kgCOD/(m)3d) While the traditional process is usually only 0.4-0.9 kgBOD/(m)3d) The Hydraulic Retention Time (HRT) can be reduced to 2h when the domestic sewage is treated, the volume of the biological reaction tank can be greatly reduced, and according to the foreign research data, the volume of the aerobic tank of the membrane bioreactor is one third of that of the aerobic tank of the traditional treatment process for the sewage quantity with the same scale. Meanwhile, the membrane bioreactor saves auxiliary equipment such as a secondary sedimentation tank, a filter tank, a sludge reflux system and the like, even sludge treatment equipment and cost. Almost all MBR processes have the effect of pathogenic bacteriaBetter removal effect, intestinal viruses, total escherichia coli, streptococcus faecalis, faecal escherichia coli and the like in the effluent are all lower than the detection limit, which shows that disinfection facilities can be even omitted if MBR effluent is directly discharged or has no residual chlorine for recycling, so that the structure of the membrane bioreactor is simple and compact.
(5) Easy to realize automatic control, simple to maintain and labor-saving
In the conventional activated sludge process, since fluctuation and instability frequently occur during operation, a large amount of manpower, financial resources and material resources must be invested in operation management in order to ensure good effluent quality. The membrane bioreactor adopts a membrane separation technology, so that the stable effluent quality is realized, and simultaneously, a mud-water separation facility is saved, so that the whole process from water inlet to water outlet of the membrane bioreactor system can be easily and automatically controlled by a microcomputer.
(6) The system has high starting speed, and the water quality can quickly meet the treatment requirement
Because the sludge concentration in water can be well maintained, the sludge concentration is improved by removing supernatant through precipitation in the start-up period of the reaction tank, which is different from the traditional aeration tank. Because the sludge particles are completely intercepted by the membrane separation effect, the sludge concentration in the system can be rapidly improved under the combined action of aeration and nutrient substances, so that the whole membrane bioreactor system is rapidly started, and the water quality can quickly meet the treatment requirement.
The utility model discloses a biological contact oxidation + MBR membrane treatment process can have higher clearance to ethylene glycol waste water, and it is good to go out water quality of water, and investment and working costs are all lower, and are higher relatively to operation management technical requirement. The COD of the inlet water is 800-1000 mg/L, and the water quality of the outlet water can reach below 100mg/L, which is superior to the water quality standard of the outlet water.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (10)
1. A fuel cell production wastewater treatment system, characterized in that it comprises:
the regulating tank is connected with an upstream production wastewater pipe network through a wastewater pipe, and is respectively connected with a sulfuric acid pipe and a sodium hydroxide pipe; the regulating tank is at least provided with a liquid level meter and a pH meter;
an inlet is connected with the lift pump of the adjusting tank through a pipeline;
a contact oxidation pond connected with the outlet of the lift pump through a pipeline;
a membrane tank connected with the contact oxidation tank for solid-liquid separation, wherein a membrane bioreactor is arranged in the membrane tank; and the clear liquid separated by the membrane tank enters the clear water tank.
2. The fuel cell production wastewater treatment system of claim 1, wherein the contact oxidation pond is internally provided with a filler, the filler is a combined filler, the combined filler comprises a filler tray made of polyethylene and a soft filler, and the soft filler is made of vinylon fibers.
3. The fuel cell production wastewater treatment system of claim 2, wherein the disk size of the filler is 10cm in diameter, and the longitudinal distance between adjacent disks of the filler is 3-6 cm.
4. The system of claim 1, wherein the contact oxidation tank further comprises an aeration blower and a plurality of aerators connected to the aeration blower, the aerators are microporous aerators made of ABS material, and the working area of each aerator is 0.3-0.4 m2。
5. The system for treating the production wastewater of the fuel cell according to claim 1, wherein the membrane tank has an area of 60 to 80m2The MBR membrane of hollow fiber membrane of (1).
6. The fuel cell industrial wastewater treatment system according to claim 1, wherein a backwash pump is provided between the clean water tank and the membrane tank.
7. The fuel cell process wastewater treatment system of claim 1, wherein the contact oxidation tank, the membrane tank and the clean water tank together form a carbon steel water treatment integrated facility.
8. The fuel cell production wastewater treatment system according to claim 7, wherein epoxy asphalt anticorrosive coatings are provided inside and outside the water treatment integrated equipment.
9. The fuel cell production wastewater treatment system according to claim 2, wherein a filler holder for placing the filler is provided in the contact oxidation tank.
10. The fuel cell production wastewater treatment system according to claim 9, wherein the filler support is made of deformed steel with a diameter of 10-12 mm, and an epoxy asphalt anticorrosive layer is also arranged on the surface of the filler support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120008490.5U CN214571379U (en) | 2021-01-04 | 2021-01-04 | Fuel cell production wastewater treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120008490.5U CN214571379U (en) | 2021-01-04 | 2021-01-04 | Fuel cell production wastewater treatment system |
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| Publication Number | Publication Date |
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| CN214571379U true CN214571379U (en) | 2021-11-02 |
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|---|---|---|---|
| CN202120008490.5U Expired - Fee Related CN214571379U (en) | 2021-01-04 | 2021-01-04 | Fuel cell production wastewater treatment system |
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|---|---|
| CN (1) | CN214571379U (en) |
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2021
- 2021-01-04 CN CN202120008490.5U patent/CN214571379U/en not_active Expired - Fee Related
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Granted publication date: 20211102 |