CN113060828B - Aeration tank with function of strengthening micro interface - Google Patents
Aeration tank with function of strengthening micro interface Download PDFInfo
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- CN113060828B CN113060828B CN202110323436.4A CN202110323436A CN113060828B CN 113060828 B CN113060828 B CN 113060828B CN 202110323436 A CN202110323436 A CN 202110323436A CN 113060828 B CN113060828 B CN 113060828B
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- 238000005273 aeration Methods 0.000 title claims abstract description 95
- 238000005728 strengthening Methods 0.000 title claims abstract description 9
- 239000002351 wastewater Substances 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 41
- 239000007789 gas Substances 0.000 claims description 27
- 238000010521 absorption reaction Methods 0.000 claims description 23
- 239000002912 waste gas Substances 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 13
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 16
- 239000001301 oxygen Substances 0.000 abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 abstract description 16
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 239000010865 sewage Substances 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 239000002699 waste material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005276 aerator Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009044 synergistic interaction Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention provides an aeration tank with a function of strengthening a micro interface, which comprises: the waste water in the water tank enters the aeration tank through the top of the aeration tank in a spraying mode, and the aeration tank is divided into a plurality of areas by adopting partition plates; a micro-interface bubble generator for dispersing broken air is arranged in each area in the aeration tank, the micro-interface bubble generator is connected with an air compressor for supplying compressed air, and wastewater is subjected to aerobic treatment under the action of air in the aeration tank and then is discharged after reaching the standard. The aeration tank of the invention changes the traditional plane series reaction tank into a three-dimensional stacking reaction tank, fully utilizes the gravity of the wastewater, saves energy and greatly saves the occupied area. And micron-sized bubbles are generated by adopting a micro-interface enhanced reaction technology so as to improve the oxygen concentration in the wastewater and improve the oxygen utilization rate. The sewage oxidation treatment efficiency is greatly improved, and the construction cost and the operation cost are greatly reduced.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to an aeration tank with a function of strengthening a micro interface.
Background
In the sewage treatment process, aeration treatment refers to a treatment method in which aerobic microorganisms degrade organic matters under the condition of sufficient oxygen supply or gas supply, so that the organic matters are stabilized and harmless. Generally, in order to improve the treatment efficiency, the conventional aeration sewage treatment system is often formed by serially connecting a plurality of treatment tanks, each treatment tank is distributed dispersedly, and the volume of the aeration tank is large, so that the whole sewage treatment system has a large floor area, the construction cost is increased, and once the aeration sewage treatment system is constructed, the position cannot be adjusted. At present, the conventional aeration tank is of a common flat-bottom structure, an aerator is arranged at the bottom of the tank, gas is conveyed to the bottom of the tank through a blower and is released through a microporous aerator, so that the dissolved oxygen level in wastewater is improved, but the method generates overlarge bubbles, is not uniform in mixing, has a lower oxygen mass transfer effect, reduces the oxygen utilization rate, has a large contradiction between oxygen demand and oxygen supply, reduces the biological propagation and reaction rate, and has lower efficiency of sewage treatment oxidation treatment. Aerators placed at the bottom of the tank make it necessary to overcome a great resistance to aeration, which greatly increases the energy consumption. In addition, in the conventional aeration mode, because the aerator is arranged at the bottom of the biological pond, the work of the biological pond must be stopped during maintenance, and liquid in the biological pond is emptied, so that the normal operation is influenced.
How to study an integrated aeration equipment, make its simple structure, construction cost is low, easy maintenance, the treatment effeciency is high, and the running cost is low, and this is the technical problem who awaits the solution at present.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide an aeration tank with a function of strengthening a micro interface, which changes a traditional plane series reaction tank into a three-dimensional stacking reaction tank, fully utilizes the gravity of wastewater, saves energy and greatly saves occupied area. And micron-sized bubbles are generated by adopting a micro-interface enhanced reaction technology so as to improve the oxygen concentration in the wastewater and improve the oxygen utilization rate. The sewage oxidation treatment efficiency is greatly improved, and the construction cost and the operation cost are greatly reduced.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides an aeration tank with a function of strengthening a micro interface, which comprises: the waste water in the water tank enters the aeration tank through the top of the aeration tank in a spraying mode, and the aeration tank is divided into a plurality of areas by adopting partition plates;
a micro-interface bubble generator for dispersing broken air is arranged in each area in the aeration tank, the micro-interface bubble generator is connected with an air compressor for supplying compressed air, and wastewater is subjected to aerobic treatment under the action of air in the aeration tank and then is discharged after reaching the standard.
The aeration tank has the advantages of low oxygen utilization rate, high energy consumption and poor treatment effect, and can not effectively treat organic waste contained in wastewater.
In the device, the aeration tank is divided into a plurality of areas, each area in the aeration tank is separated by a partition plate through a three-dimensional stacking method, a micro-interface bubble generator is arranged in each area, the micro-interface bubble generator supplies air to the micro-interface through an air compressor, and the air which is dispersed and broken through the micro-interface forms fine micro-bubbles, so that the biological aerobic treatment effect is enhanced.
Preferably, as a further implementable scheme, the aeration tank is divided into four areas, the partition plates arranged on the central axis in the aeration tank are of a porous structure, and the wastewater sprayed into the aeration tank can flow back and forth through the holes in the partition plates so as to improve the treatment effect.
In the scheme of the invention, the partition plate arranged on the central axis in the aeration tank is designed into a porous structure, and the pore channels are relatively uniform, so that the wastewater sprayed from the top flows through the pore channels on the partition plate to improve the treatment effect, and the pore channels also have a certain extrusion effect on the wastewater, so that the action degree of air on the wastewater is improved, and the aeration effect is improved by the synergistic interaction of the air and the micro-interface bubble generator.
Preferably, as a further practicable solution, the top of the partition plate on the central axis is spaced from the top of the aeration tank by a distance to allow a gap for the sprayed-in wastewater. It is preferable that the top of the partition plate is spaced apart to give a spraying space.
Preferably, as a further implementable scheme, two micro-interface bubble generators are arranged in each region, the two micro-interface bubble generators are arranged in a staggered manner, and a connecting rod is arranged between the two micro-interface bubble generators. The micro-interface bubble generator is arranged in a staggered mode so as to improve the air utilization rate in the region, and the staggered arrangement mode can ensure that the action condition of the whole region has no dead angle. The connecting rod can play a certain fixed role.
Preferably, as a further implementable solution, the micro-interface bubble generator is submerged below the liquid level of the waste liquid in the aeration tank. The advantage of immersing the micro-interface bubble generators below the liquid level is that the broken bubbles can immediately enter the wastewater to fully contact with the wastewater, and the aerobic treatment effect is improved.
Preferably, as a further practical solution, a wastewater circulating pump is arranged on the side of each aeration tank, and the wastewater circulating pump is used for circulating wastewater at the bottom of the tank back to enter from the top of the micro-interface bubble generator.
Every micro-interface bubble generator utilizes the waste water that waste water circulating pump circulation comes as the power of dispersion broken air, through beating the circulation of waste water circulating pump like this, utilize this partial waste water as the broken motive power of drive micro-interface bubble generator dispersion on the one hand, lie in aeration tank bottom waste water on the other hand and return the top again and strengthen its aerobic treatment effect, it is not simple that this micro-interface bubble generator disperses the breakage with the air, still through inhaling the waste water to the continuous backmixing improvement waste water's in the micro-interface bubble generator treatment effect.
It will be appreciated by those skilled in the art that the micro-interfacial bubble generator employed in the present invention is embodied in the inventor's prior patents, such as those of application nos. CN201610641119.6, CN201610641251.7, CN201710766435.0, CN106187660, CN105903425A, CN109437390A, CN205833127U and CN 207581700U. The detailed product structure and working principle of the micro bubble generator (i.e. micro interfacial bubble generator) are described in the prior patent CN201610641119.6, which describes that "the micro bubble generator comprises a body and a secondary crushing member, a cavity is arranged in the body, the body is provided with an inlet communicated with the cavity, the opposite first end and second end of the cavity are both open, wherein the cross-sectional area of the cavity decreases from the middle of the cavity to the first end and second end of the cavity; the secondary crushing member is disposed at least one of the first end and the second end of the cavity, a portion of the secondary crushing member is disposed within the cavity, and an annular passage is formed between the secondary crushing member and the through holes open at both ends of the cavity. The micron bubble generator also comprises an air inlet pipe and a liquid inlet pipe. "the specific working principle of the structure disclosed in the application document is as follows: liquid enters the micro-bubble generator tangentially through the liquid inlet pipe, and gas is rotated at a super high speed and cut to break gas bubbles into micro-bubbles at a micron level, so that the mass transfer area between a liquid phase and a gas phase is increased, and the micro-bubble generator in the patent belongs to a pneumatic micro-interface generator.
In addition, in the prior patent 201610641251.7, it is described that the primary bubble breaker has a circulation liquid inlet, a circulation gas inlet and a gas-liquid mixture outlet, and the secondary bubble breaker is a device that communicates the feed inlet with the gas-liquid mixture outlet, which indicates that the bubble breakers all need to be mixed with gas and liquid, and in addition, as can be seen from the following figures, the primary bubble breaker mainly uses the circulation liquid as power, so that the primary bubble breaker belongs to a hydraulic micro-interface generator, and the secondary bubble breaker simultaneously introduces the gas-liquid mixture into an elliptical rotating ball for rotation, thereby realizing bubble breaking in the rotation process, so that the secondary bubble breaker actually belongs to a gas-liquid linkage micro-interface generator. In fact, whether it is a hydraulic micro-interface generator or a gas-liquid linkage micro-interface generator, it is a specific form of the micro-interface generator, however, the micro-interface bubble generator adopted in the present invention is not limited to the above forms, and the specific structure of the bubble breaker described in the prior patent is only one of the forms that the micro-interface generator of the present invention can adopt.
Furthermore, the prior patent 201710766435.0 states that "the principle of the bubble breaker is that of high-speed jet to achieve mutual collision of gases", and also states that it can be used in a micro-interface enhanced reactor, verifying the correlation between the bubble breaker itself and the micro-interface generator; moreover, in the prior patent CN106187660, there is a related description on the specific structure of the bubble breaker, see paragraphs [0031] to [0041] in the specification, and the accompanying drawings, which illustrate the specific working principle of the bubble breaker S-2 in detail, the top of the bubble breaker is a liquid phase inlet, and the side of the bubble breaker is a gas phase inlet, and the liquid phase coming from the top provides the entrainment power, so as to achieve the effect of breaking into ultra-fine bubbles, and in the accompanying drawings, the bubble breaker is also seen to be of a tapered structure, and the diameter of the upper part is larger than that of the lower part, and also for better providing the entrainment power for the liquid phase.
Since the micro-interface bubble generator was just developed in the early stage of the prior patent application, the micro-interface bubble generator was named as a micro-bubble generator (CN 201610641119.6), a bubble breaker (201710766435.0) and the like in the early stage, and the micro-interface bubble generator is named as a micro-interface bubble generator in the later stage along with the continuous technical improvement, and the micro-interface bubble generator in the present invention is equivalent to the previous micro-bubble generator, bubble breaker and the like, and the names are different.
In summary, the micro-interface bubble generator of the present invention belongs to the prior art, although some micro-interface bubble generators belong to the pneumatic micro-interface generator type, some micro-interface generators belong to the hydraulic micro-interface generator type, and some micro-interface generators belong to the gas-liquid linkage micro-interface generator type, the difference between the types is mainly selected according to the different specific working conditions, and in addition, the connection between the micro-interface bubble generator and the reactor, as well as other devices, including the connection structure and the connection position, is determined according to the structure of the micro-interface generator, which is not limited. Although the structure of the micro-interface bubble generator belongs to the prior art, the specific arrangement position and the working mode of the micro-interface bubble generator are combined in the wastewater aerobic treatment process of the invention, and the micro-interface bubble generator is specially designed in combination with the specific actual process.
Preferably, as a further practicable scheme, the system further comprises water dropping ports communicated with all the areas of the aeration tank, and the wastewater in the upper area enters the lower area through the water dropping ports.
Preferably, as a further practicable solution, an exhaust gas outlet is arranged at a position close to the upper side of the side wall of the aeration tank, and the exhaust gas outlet is connected with an absorption tower for treating the exhaust gas.
The upper area of the aeration tank is provided with a water drop port to be communicated with the area of the next stage aeration tank; in addition, the top of the first stage area is provided with a water inlet, and the last stage area is provided with a water outlet.
Preferably, as a further implementable scheme, a liquid outlet is formed in the absorption tower, the liquid outlet is communicated with the water tank, and carbon dioxide and H in the waste gas 2 S、NH 3 And returning to the water tank from the liquid outlet after being absorbed.
Preferably, as a further practicable scheme, the top of the absorption tower is provided with a gas outlet for discharging the gas after absorption treatment to the atmosphere.
The absorption tower is used for absorbing carbon dioxide and H in the waste gas 2 S、NH 3 The gas and the waste liquid absorbing the waste gas are returned to the original water tank of the process for wastewater treatment, and the treated gas basically does not contain any waste and can be directly discharged into the atmosphere through the gas outlet. The absorption tower is also provided with a fresh absorption liquid inlet for supplementing fresh absorption liquid.
Preferably, as a further implementable scheme, the system further comprises a wastewater delivery pump, wherein one end of the wastewater delivery pump is connected with the water tank through a pipeline, and the other end of the wastewater delivery pump is connected with the top of the aeration tank through a pipeline.
When the device is operated, sewage is conveyed to the topmost area of the aeration tank through the wastewater conveying pump, the micro-interface bubble generator conveys the sewage at the bottom of the area to the micro-interface bubble generator through the wastewater circulating pump, and simultaneously conveys compressed air to the micro-interface bubble generator, so that micron-sized bubbles are continuously generated, the micron-sized bubbles can improve the mass transfer efficiency of oxygen in water, and simultaneously play a role in stirring, and the distribution of the concentration of microorganisms and the concentration of organic matters in the whole reaction tank is uniform. When the wastewater in the upper area of the aeration tank fully reacts and the liquid level reaches the water drop port, the wastewater starts to enter the lower area of the aeration tank for further reaction. The type and concentration of microorganisms in the lower area of the aeration tank can be adjusted according to the requirements to meet the standard requirement of water quality, other operations are similar to those in the upper area of the aeration tank, and the number of the areas of the aeration tank can be set according to the treatment requirement. And finally, after the wastewater enters the bottommost area of the aeration tank, the wastewater reaching the standard is discharged through a last-stage water outlet. The waste gas generated by each level of biological reaction is gathered at the top of the level area and is finally uniformly conveyed into the absorption tower through a pipeline, the air and most of carbon dioxide in the waste gas are discharged from the top of the tower, and the liquid discharged from the tower bottom, which contains hydrogen sulfide, ammonia gas, a small amount of carbon dioxide and the like, returns to the water tank again for reaction.
Compared with the prior art, the invention has the beneficial effects that:
1) The three-dimensional stacked integrated aeration tank greatly saves the occupied area; the aeration tank can be made of stainless steel, high-strength plastic and the like, and is corrosion-resistant and low in consumption.
2) The aeration tank has the advantages of convenient and reliable installation, simple structure, low construction cost, small occupied area, convenient maintenance, high treatment efficiency and low operation cost, and can carry and recombine areas at all levels according to requirements.
3) The liquid flows by self gravity, and the micro-interface bubble generator changes the form that the traditional aeration method needs to supply air from the bottom of the tank, thereby reducing the operation energy consumption required by the whole treatment device.
4) The waste gas of the traditional device is directly discharged into the atmosphere, so that the environment is polluted, and the aeration tank can collect the waste gas generated in each area, absorb harmful gas in the waste gas by adopting the absorption tower and then discharge the harmful gas, so that the aeration tank is environment-friendly and safe.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of an aeration tank with a function of strengthening a micro interface according to an embodiment of the present invention.
Reference numerals:
1-a water tank; 2-a waste water delivery pump;
3, an air compressor; 4-micro-interface bubble generator;
5-an aeration tank; 6-water drop;
7-an exhaust gas outlet; 8-an absorption tower;
9-a liquid outlet; 10-air outlet;
11-fresh absorption liquid inlet; 12-standard sewage outlet;
13-a wastewater circulating pump; 14-a separator;
15-connecting rod.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly illustrate the technical solution of the present invention, the following description is made in the form of specific embodiments.
Examples
Referring to fig. 1, an aeration tank with a function of strengthening a micro interface according to an embodiment of the present invention mainly includes a water tank 1 for storing waste liquid to be treated, and an aeration tank 5 divided into a plurality of areas by partitions 14, wherein a micro interface bubble generator 4 for dispersing broken air is disposed in each area of the aeration tank 5, and the micro interface bubble generator 4 is connected to an air compressor 3 for supplying compressed air. The entering air is dispersed and crushed by the micro-interface bubble generator 4, so that the oxygen concentration in the wastewater is improved, and the utilization rate of the oxygen is improved. Aeration tank 5 is cut apart into four regions, and the inside baffle that is located the axis setting of aeration tank is porous structure, sprays and enters into 5 inside waste water of aeration tank and can make a round trip to flow in order to improve the treatment effect through the hole on the baffle 14, baffle 14 top on the axis with there is the distance in order to leave the space for spraying the waste water of coming between the top of aeration tank 5 at the interval, and every regional inside is provided with two micro-interface bubble generator 4, and two micro-interface bubble generator 4 fall by mistake set up, connect through connecting rod 15 between the micro-interface bubble generator 4.
When the reaction device is operated, the waste water in the water tank 1 is conveyed into the upper area of the aeration tank 5 through the waste water inlet by the waste water conveying pump 2, after biological treatment, the waste water enters the lower area of the aeration tank 5 through the water dropping ports 6 communicating with all areas of the aeration tank 5, after further reaction, the aeration tank 5 of the area is provided with a standard-reaching sewage outlet 12, and the treated standard-reaching waste water is discharged from the sewage outlet.
In order to improve the efficiency of the micro-interface bubble generator 4, the micro-interface bubble generator 4 is preferably immersed under the wastewater level in the region of each aeration tank 5, and a wastewater circulating pump 13 is disposed at the side of the aeration tank 5, the wastewater circulating pump 13 is used for circulating the wastewater at the bottom of the tank back to enter from the top of the micro-interface bubble generator 4 to be used as a power for dispersing and crushing and also to play a role in stirring the treated wastewater.
In addition, waste gas generated by the reaction is collected at the top of the aeration tank 5, enters from the air inlet of the absorption tower 8 through the waste gas outlet 7, fresh absorption liquid is sprayed from the fresh absorption liquid inlet 11, and a small amount of carbon dioxide and H in the waste gas 2 S、NH 3 And the absorbed waste gas is re-merged into the waste water conveying pump 2 through the liquid outlet 9, and is re-returned to the water tank 1 for further treatment, and the nitrogen, oxygen and other gases in the waste gas can be discharged into the atmosphere through the gas outlet 10 at the top of the absorption tower 8. It is understood that the number of stages of the biological treatment tank and the kind of the microorganism in each stage of the biological treatment tank are not limited in this example, and only need to be determined according to the treatmentAnd (5) preparing the waste water according to the requirement.
In practical application, the wastewater of a certain chemical plant is stored in a water tank 11, the BOD of the original wastewater is 800, the COD is 1500, the wastewater is conveyed to an aeration tank 5 by a wastewater conveying pump 2, and aerobic strains are cultured in the stage treatment tank. The micro-interface bubble generator 4 is supplied with compressed air by the air compressor 3 through a pipeline, in addition, the waste liquid at the bottom of the first-stage pool is pumped by the waste water circulating pump 13 for supplying liquid, finally bubbles with the bubble size within the range of 400-1000 mu m are generated, and the DO value reaches 2mg/L. After the wastewater stays in the aeration tank 5 for a certain time, the BOD and COD values are respectively reduced to 400 and 500. Further, the wastewater flows into the lower area of the aeration tank 5 through a water drop port 6 in the aeration tank 5, and the treatment tank at the stage is cultivated with a second aerobic strain. The micro-interface bubble generator 4 is supplied with compressed air by the air compressor 3 through a pipeline, in addition, the waste liquid at the bottom of the second-stage pool is pumped by the waste water circulating pump 13 for supplying liquid, finally bubbles with the bubble size within the range of 400-1000 mu m are generated, and the DO value reaches 2mg/L. After the wastewater stays in the secondary treatment tank for a certain time, the BOD and the COD values respectively drop to 100 and 300. Finally generating bubbles with the bubble size ranging from 400 to 1000 μm, and the DO value reaches 2mg/L. After the waste water stays in the last stage treatment tank for a certain time, the BOD and COD values are respectively reduced to 40 and 150. The wastewater reaching the standard is discharged through a sewage outlet 12. Waste gas generated by reaction is gathered at the top of the biological treatment tank, and is discharged through a waste gas outlet 7 and then enters from an air inlet of an absorption tower 8, clear water is adopted as fresh absorption liquid to be sprayed from an inlet 11 of the fresh absorption liquid, and a small amount of carbon dioxide and H in the waste gas 2 S、NH 3 Etc. are absorbed and re-introduced into the waste water pump 2 via the liquid outlet 9 for further treatment, while the nitrogen, oxygen, etc. in the waste gas can be discharged into the atmosphere through the gas outlet 10.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An aeration tank with a function of strengthening a micro interface is characterized by comprising: the waste water in the water tank enters the aeration tank through the top of the aeration tank in a spraying mode, and the aeration tank is divided into a plurality of areas by adopting partition plates;
a micro-interface bubble generator for dispersing broken air is arranged in each area in the aeration tank, the micro-interface bubble generator is connected with an air compressor for supplying compressed air, and wastewater is subjected to aerobic treatment under the action of air in the aeration tank and then is discharged after reaching the standard;
the aeration tank is divided into four areas, the partition plates arranged in the aeration tank and positioned on the central axis are of porous structures, and wastewater sprayed into the aeration tank flows back and forth through the holes in the partition plates so as to improve the treatment effect;
two micro-interface bubble generators are arranged in each area, the two micro-interface bubble generators are arranged in a staggered mode, and a connecting rod is arranged between the two micro-interface bubble generators.
2. An aeration tank according to claim 1, wherein the top of the partition in the central axis is spaced from the top of the aeration tank to provide clearance for the wastewater being sprayed in.
3. An aeration tank according to claim 1, further comprising a wastewater circulation pump for circulating wastewater from the bottom of the tank back into the top of the micro-interface bubble generator.
4. The aeration tank according to claim 1, wherein an exhaust gas outlet is provided at a position above the side wall of the aeration tank, and the exhaust gas outlet is connected with an absorption tower for treating exhaust gas.
5. The aeration tank as claimed in claim 4, wherein the absorption tower is provided with a liquid outlet, the liquid outlet is communicated with the water tank, and carbon dioxide in the waste gas and H2S and NH 3 are absorbed and then returned to the water tank from the liquid outlet.
6. The aeration tank of claim 4, wherein the top of the absorption tower is provided with an air outlet for discharging the absorption-treated gas to the atmosphere.
7. An aeration tank according to any one of claims 1 to 6, further comprising a wastewater delivery pump, one end of which is connected to the water tank by a pipe and the other end of which is connected to the top of the aeration tank by a pipe.
8. An aeration tank according to any one of claims 1 to 6, wherein the micro-interface bubble generator is submerged below the wastewater level in the aeration tank.
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