CN111039518B - Water body supersaturated gas dissolving device - Google Patents
Water body supersaturated gas dissolving device Download PDFInfo
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- CN111039518B CN111039518B CN201911421750.5A CN201911421750A CN111039518B CN 111039518 B CN111039518 B CN 111039518B CN 201911421750 A CN201911421750 A CN 201911421750A CN 111039518 B CN111039518 B CN 111039518B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 239000007788 liquid Substances 0.000 claims abstract description 174
- 239000007789 gas Substances 0.000 claims abstract description 80
- 238000002156 mixing Methods 0.000 claims abstract description 70
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 238000007670 refining Methods 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 26
- 239000000945 filler Substances 0.000 claims description 10
- 239000010432 diamond Substances 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000012528 membrane Substances 0.000 abstract description 3
- 230000010355 oscillation Effects 0.000 abstract description 2
- 238000005273 aeration Methods 0.000 description 11
- 230000001965 increasing effect Effects 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 238000006213 oxygenation reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- 238000000034 method Methods 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
- 238000005516 engineering process Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
- B01F33/71—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming working at super-atmospheric pressure, e.g. in pressurised vessels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
-
- 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
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/305—Treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
-
- 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
Abstract
The invention discloses a water body supersaturated gas dissolving device, which comprises an oxygen generator, an air compressor, a booster pump, a gas dissolving tank and a protective filter; the water outlet of the pressurizing pump is connected with the water inlet of the protection filter, and the water outlet of the protection filter is connected with the water inlet of the dissolved air tank; the air outlet of the air compressor is connected with the air inlet of the oxygenerator, the air outlet of the oxygenerator is connected with the air inlet of the dissolved air tank, and the dissolved air tank is internally provided with a gas-liquid mixing bin, a liquid refiner and a gas-liquid mixer for refining and cutting the water body for many times. The invention can promote the high-frequency oscillation of the water-gas double-membrane interface, greatly reduce the diameters of gas and water molecule groups, sharply increase the number of small water molecule groups and gas molecule groups, greatly increase the contact area of gas and water molecules, greatly reduce mass transfer resistance, realize the full contact mass transfer of water and air, and enable the air to dissolve in human water to reach supersaturated dissolved gas.
Description
Technical Field
The invention belongs to the technical field of oxygenation equipment, and particularly relates to a water body supersaturation gas dissolving device.
Background
Along with the rapid increase of urban progress and population in China, the discharge amount of industrial wastewater and domestic sewage is rapidly increased, so that the concentration of pollutants such as COD, suspended matters, nitrogen, phosphorus and the like in water bodies exceeds the standard, the phenomenon of seasonal or annual water body eutrophication of water bodies of a plurality of urban rivers is caused, and the structural imbalance of a water body ecological system seriously influences the life and the physical health of people.
In recent years, water purification and ecological restoration, which are relatively commonly used, mainly include: flocculation precipitation, aeration and oxygenation, a biological membrane technology, an artificial wetland constructed by aquatic plants, an aquatic plant oxidation pond, an ecological floating bed, an artificial floating island and the like. Wherein, the aeration oxygenation is widely used in the treatment of polluted river channels at home and abroad because of the simplicity, rapidness, no limitation, no secondary pollution, low investment cost and quick effect.
The dissolved oxygen is an important index for measuring the quality of water and is also one of important influencing factors of the ecological environment of the water body. The aeration and oxygenation of the water body are beneficial to the mass transfer of oxygen, the dissolved oxygen level of the water body is improved, the activity of aerobic microorganisms in the water body is recovered and enhanced, and the release of bottom mud nitrogen and phosphorus is inhibited, so that pollutants in the water body are removed, and the water quality of a river channel is improved. At present, the existing river aeration oxygenation technology mainly comprises a pure oxygen aeration system, a blower microporous gas distribution pipe aeration system, an impeller suction plug flow type aeration system, an underwater jet aeration system and the like, and the technologies have the defects of poor oxygenation effect, low oxygen utilization rate, high cost and the like, and the utilization rate of gas is taken as an example, and the utilization rate of oxygen in the prior art is only 30-60%.
Chinese patent CN207493516U discloses a high-efficient high concentration gas dissolving device that can go on supersaturated solution, including dissolving tank, release jar, aeration head, gas-liquid mixing pump, the dissolving tank is from top to bottom divided into residual gas recovery district, produces water district, dissolved gas district and mixed district, the release jar upper end is the open end, and its lower extreme and dissolving tank bottom airtight connection, the top of dissolving tank is equipped with residual gas recovery mouth, the dissolving tank upper end is equipped with inlet and liquid outlet, and the dissolving tank lower extreme is equipped with gas-liquid mixture entry and gas-liquid mixture export, aeration head one end is connected with gas-liquid mixture entry through the pipeline, and the other end is connected with gas-liquid mixing pump one end through the pipeline, the other end of gas-liquid mixing pump passes through pipeline and gas-liquid mixture exit linkage, the gas-liquid mixing pipe of gas-liquid mixture entry stretches into the inside of release jar, the release mouth of gas-liquid mixing pipe is upwards, be equipped with the air inlet on the gas-liquid mixing pump, the air inlet passes through the pipeline and is connected with residual gas recovery mouth. The high-efficiency high-concentration gas dissolving device realizes the multiple contact dissolution of the gas and the gas-liquid mixture through the multiple suction of the gas-liquid mixing pump, but the gas in the gas-liquid mixture cannot be dissolved again after being dissolved to a certain degree, and the dissolved gas can be separated from the gas-liquid mixture.
Chinese patent CN108083461a discloses a micro-nano oxygenation device comprising, in order from top to bottom, a diverter, at least one dissolved air tank and a double suction pump; the tail end of the water inlet of the double-suction pump is provided with an air inlet, and the air inlet of the double-suction pump is communicated with the outside atmosphere through an air inlet pipe; the water inlet of the diverter is connected with the water outlet of the double-suction pump; the top of the diverter is provided with a plurality of water outlets, and the water outlet of each diverter is connected with the dissolved air tank through the water inlet of the dissolved air tank; at least one group of turbulence blades are arranged at the water inlet of the dissolved air tank and inside the dissolved air tank; the bottom of the dissolved air tank is provided with a water outlet, and the liquid in the dissolved air tank is discharged into the water body through the water outlet. The micro-nano oxygenation equipment in the patent realizes dissolution through collapse and bursting of bubbles dissolved in water, the gas content in the gas-liquid mixture is about 10mg/L, and the dissolution rate and the dissolution efficiency are low.
Disclosure of Invention
Based on the problems existing in the background technology, the invention aims to provide a water body supersaturated gas dissolving device aiming at the problems of water body eutrophication and the like so as to overcome the defects of the prior art. The invention can increase the contact area of the gas and the water body, prolong the residence time of the gas in the water, improve the oxygenation rate of the water body, realize the supersaturation dissolution of the gas in the water, and simultaneously can increase the content of active oxygen in the water body and greatly improve the utilization rate of the oxygen.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention provides a water body supersaturated gas dissolving device which comprises an oxygenerator, an air compressor, a pressurizing pump, a gas dissolving tank and a protective filter, wherein the oxygen generator is arranged on the air compressor; the water outlet of the pressurizing pump is connected with the water inlet of the protection filter, and the water outlet of the protection filter is connected with the water inlet of the dissolved air tank; the air outlet of the air compressor is connected with the air inlet of the oxygenerator, the air outlet of the oxygenerator is connected with the air inlet of the dissolved air tank, and the dissolved air tank is internally provided with a gas-liquid mixing bin, a liquid refiner and a gas-liquid mixer for refining and cutting the water body for many times.
Preferably, a filter head is arranged at the water inlet of the pressurizing pump, a pressure gauge and a liquid stop valve are arranged on the liquid pipelines of the protection filter and the dissolved air tank, and a flowmeter and a gas stop valve are arranged on the gas pipelines of the oxygen generator and the dissolved air tank.
Preferably, the dissolved air tank comprises a shell, a gas-liquid mixing bin, a liquid refiner and a gas-liquid mixer, wherein the gas-liquid mixing bin and the gas-liquid mixer are arranged in the shell; the top of the shell is provided with an air inlet, the side part of the shell is provided with a liquid inlet, the bottom of the shell is provided with a water outlet, the gas-liquid mixing bin is connected with the oxygenerator through the air inlet, the liquid refiner is connected with the protective filter through the liquid inlet, the liquid refiner is arranged in the gas-liquid mixing bin, and the liquid outlet of the gas-liquid mixing bin is connected with the gas-liquid mixer.
Preferably, the gas-liquid mixing bin is internally provided with a multi-stage guide vane, the guide vane is fixed on the inner wall of the gas-liquid mixing bin, the thickness of the guide vane at the part close to the inner wall of the gas-liquid mixing bin is large, the thickness of the guide vane at the part far away from the inner wall of the gas-liquid mixing bin is small, the central angles corresponding to the guide vane are all 150 degrees, and the helix angle is 30 degrees.
Preferably, a plurality of overflow discs are arranged in the liquid refiner, the overflow discs are horizontally arranged at intervals, a plurality of first micropores are formed in the overflow discs, and the sizes of the first micropores are sequentially reduced from top to bottom.
Preferably, the gas-liquid mixer comprises a fluid shunt tube and a gas-liquid mixing tube, wherein the fluid shunt tube is connected with a liquid outlet of the gas-liquid mixing bin, the gas-liquid mixing tube is installed on the fluid shunt tube at intervals and is communicated with the fluid shunt tube, a filler is arranged in the gas-liquid mixing tube, and a water outlet at the bottom of the gas-liquid mixing tube is communicated with a water outlet of the shell.
Preferably, the guide vane comprises a clockwise guide vane and a counterclockwise guide vane.
Preferably, the first micropores are one or more of round, diamond, square and honeycomb.
Preferably, the water outlet of the fluid shunt tube is provided with a nano-filter disc, the nano-filter disc is made of high polymer materials, and a plurality of second micropores are formed in the nano-filter disc and are round, diamond or square.
Preferably, the filler is one or more of round, diamond, corrugated, and honeycomb.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. the dissolved air tank of the invention promotes the high-frequency oscillation of the water-air double-membrane interface by the action of the common pressurization of the gas and the liquid, the strong cutting and collision generated by the multi-stage guide vane in the gas-liquid mixing bin, and the like, so that the diameters of the gas and the water molecule groups are greatly reduced, the number of the small water molecule groups and the gas group is greatly increased, the contact area of the gas and the water molecule is greatly increased, the mass transfer resistance is greatly reduced, the full contact mass transfer of the water and the air is realized, and the air is dissolved in the water to reach the saturation degree as far as possible.
2. The liquid refiner of the invention adopts the first micropores with different specifications, and can cut high-pressure liquid layer by layer, so that macromolecular water clusters are refined into small molecular water clusters, the contact area of liquid and gas is increased, and the content of dissolved oxygen in water is improved.
3. The multistage sequential needle guide vane and the reverse needle guide vane are arranged in the gas-liquid mixing bin, and the mixed fluid of high-pressure gas and liquid can realize the micro-nano level gas-liquid mixing degree in the cutting, collision and re-cutting processes of the guide vane.
4. The nano filter disc is arranged in the fluid shunt tube, so that the nano mixing degree of the gas-liquid mixed fluid is further refined, the contact area of the gas and water is increased to the greatest extent, and the residence time of the gas in the water is prolonged. The nano filter disc is made of high molecular polymer materials, and has the advantages of impact resistance, corrosion resistance, stable chemical property, aging resistance, long service life, excellent processability and the like.
5. The filler is arranged in the gas-liquid mixed flow pipe, so that the mixing time of gas and liquid can be prolonged, the gas is supersaturated and dissolved in the water body, the utilization efficiency of the gas is improved, and meanwhile, the gas-liquid separation caused by sudden change of air pressure can be prevented, and the gas is locked in the water body to the greatest extent.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of a gas-liquid tank according to the present invention;
FIG. 3 is a schematic diagram of the structure of the gas-liquid mixing chamber in the invention;
FIG. 4 is a schematic view of the structure of the liquid refiner of the present invention;
FIG. 5 is a schematic view of the structure of the overcurrent disc according to the invention;
FIG. 6 is a schematic view of a multi-stage vane according to the present invention;
FIG. 7 is a schematic diagram of a gas-liquid mixer according to the present invention;
FIG. 8 is a schematic view of a fluid shunt according to the present invention;
FIG. 9 is a schematic diagram of a gas-liquid mixing tube according to the present invention;
labeling in the schematic illustration:
1-an air compressor; 2-an oxygenerator; 3-a flow meter; 4-a filter head; 5-a booster pump; 6-protecting the filter; 7-a pressure gauge; 8-a dissolved air tank; 9-an air stop valve; 10-a liquid stop valve; 81-a housing; 82-a gas-liquid mixing bin; 83-a liquid refiner; 84-a gas-liquid mixer; 85-guide vanes; 86-overcurrent disc; 811-an air inlet; 812-liquid inlet; 813-a water outlet; 841-fluid shunt; 842-a gas-liquid mixing tube; 843-filler; 844-nano-filter discs; 845-second microwells; 851-clockwise guide vanes; 852-reverse time needle guide vane; 861-first microwells.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the present embodiment relates to a water body supersaturated gas dissolving device, which comprises an oxygen generator 2, an air compressor 1, a booster pump 5, a gas dissolving tank 8 and a protection filter 6; the water outlet of the booster pump 5 is connected with the water inlet of the protection filter 6, and the water outlet of the protection filter 6 is connected with the water inlet of the dissolved air tank 8; the air outlet of the air compressor 1 is connected with the air inlet of the oxygenerator 2, and the air outlet of the oxygenerator 2 is connected with the air inlet of the dissolved air tank 8. The water inlet of the pressure pump 5 is provided with a filter head 4, the liquid pipelines of the protection filter 6 and the dissolved air tank 8 are provided with a pressure gauge 7 and a liquid stop valve 10, the pressure gauge 7 is used for measuring the pressure of the inlet liquid on the inlet liquid pipeline, so that the pressure of the inlet liquid is properly regulated, and the liquid stop valve 10 is used for preventing the liquid from flowing backwards. The gas paths of the oxygenerator 2 and the dissolved gas tank 8 are provided with a flowmeter 3 and a gas stop valve 9. The flow meter 3 in the air inlet pipeline is used for measuring the air supply flow of the air compressor 1, and the air stop valve 9 is used for preventing the air-liquid mixture from flowing backwards.
As shown in fig. 2, the dissolved air tank 8 comprises a shell 81, a gas-liquid mixing bin 82, a liquid refiner 83 and a gas-liquid mixer 84, wherein the gas-liquid mixing bin 82 and the gas-liquid mixer 84 are arranged in the shell 81; the top of the shell 81 is provided with an air inlet 811, the side part is provided with a liquid inlet 812, the bottom is provided with a water outlet 813, the gas-liquid mixing bin 82 is connected with the oxygenerator 2 through the air inlet 811, the liquid refiner 83 is connected with the protection filter 6 through the liquid inlet 812, the liquid refiner 83 is arranged in the gas-liquid mixing bin 82, and the liquid outlet of the gas-liquid mixing bin 82 is connected with the liquid inlet of the gas-liquid mixer 84.
As shown in fig. 3 and 6, the gas-liquid mixing chamber 82 is provided therein with a plurality of stages of guide vanes 85, the guide vanes 85 are fixed on the inner wall of the gas-liquid mixing chamber 82, the thickness of the guide vanes 85 near the inner wall of the gas-liquid mixing chamber 82 is large, the thickness of the guide vanes far from the inner wall of the gas-liquid mixing chamber 82 is small, the central angles corresponding to the guide vanes 85 are all 150 ° and the helix angle is 30 °. The guide vane 85 includes a clockwise guide vane 851 and a counterclockwise guide vane 852. The mixed fluid of high-pressure gas and liquid can realize the micro-nano level gas-liquid mixing degree in the cutting, collision and re-cutting processes of the guide vane 85
As shown in fig. 4 and 5, the liquid refiner 83 is provided with a plurality of flow-through plates 86, the flow-through plates 86 are horizontally arranged at intervals, the flow-through plates 86 are provided with a plurality of first micro-holes 861, the first micro-holes 861 are circular, the sizes of the first micro-holes 861 are sequentially reduced from top to bottom, the aperture of the first micro-holes 861 on the flow-through plate 86 at the uppermost layer is 10mm, and the aperture of the first micro-holes 861 on the flow-through plate 86 at the lowermost layer is 100um. The liquid refiner adopts the first micropores 861 with different specifications, and can cut high-pressure liquid layer by layer, so that macromolecular water clusters are refined into small molecular water clusters, the contact area of liquid and gas is increased, and the content of dissolved oxygen in water is improved.
As shown in fig. 7 to 9, the gas-liquid mixer 84 includes a fluid shunt tube 841 and a gas-liquid mixing tube 842, the fluid shunt tube 841 is connected with a liquid outlet of the gas-liquid mixing chamber 82, the gas-liquid mixing tube 842 is installed on the fluid shunt tube 841 at intervals and is communicated with the fluid shunt tube 841, a filler 843 is disposed inside the gas-liquid mixing tube 842, the filler 843 has a circular structure, the filler 843 can prolong the mixing time of gas and liquid, so that the gas is dissolved in the water body in an supersaturated manner, the utilization efficiency of the gas is improved, and meanwhile, the gas can be prevented from being separated due to sudden change of air pressure, and the gas is locked in the water body to the maximum extent. The water outlet at the bottom of the gas-liquid mixing tube 842 is communicated with the water outlet 813 of the housing 81. The water outlet of the fluid shunt 841 is provided with a nano-filter plate 844, the nano-filter plate 844 is made of high molecular polymer materials, a plurality of second micropores 845 are formed in the nano-filter plate 844, and the second micropores 845 are round. The nano-filter plate 844 further refines the nano-scale mixing degree of the gas-liquid mixed fluid, the contact area of the gas and water is increased to the greatest extent, and the residence time of the gas in the water is prolonged. The nano filter plate 844 is made of a high molecular polymer material, and has the advantages of impact resistance, corrosion resistance, stable chemical property, aging resistance, long service life and excellent processability.
The working principle of the invention is as follows:
(1) Pressurized water body conveying process: the water body is filtered by the filter head 4 and then is conveyed to the booster pump 5 through the liquid pipeline, the pressurized wastewater is filtered for the second time in the protection filter 6, then is conveyed to the gas-liquid dissolved air tank 8 through the liquid pipeline, pressurized liquid enters the liquid refiner 83 from the liquid inlet 812, the pressurized liquid is subjected to primary cutting in the liquid refiner 83 through the first micropores 861 on the overflow disc 86, and the refined liquid enters the gas-liquid mixing bin 82 to be mixed with pressurized air.
(2) Pressurized air delivery process: the air is pressurized by the air compressor 1 and then conveyed to the oxygenerator 2 through the gas pipeline, the gas is extracted under the action of the oxygenerator 2, the pressurized gas enters the gas-liquid mixing bin 82 through the gas inlet 81, and the pressurized gas is mixed with refined pressurized liquid in the gas-liquid mixing bin 82.
(3) The process of dissolving the gas in the water body: the process of dissolving the gas in the water body is carried out in the gas-liquid dissolved air tank 8, and comprises the following steps of:
step one: the pressurized refined liquid and the pressurized gas are mixed in the gas-liquid mixing bin 82, and under the actions of cutting, collision and re-cutting of the multi-stage guide vane 85, the large water molecular clusters are refined into water molecular clusters, so that the contact area of water molecules and gas is increased, and the residence time of the gas in water is prolonged.
Step two: the gas-liquid fluid mixed by the gas-liquid mixing bin 82 enters the gas-liquid mixer 84, and the second micropores 845 on the nano-filter plate 844 in the gas-liquid mixer 84 refine the gas-liquid mixed fluid flowing through again, so that the gas-liquid mixing degree reaches the nano-scale, the utilization efficiency of oxygen in the water body is improved, and finally the gas is dissolved in the water body in a supersaturated manner.
Step three: the mixed gas-liquid fluid is deeply mixed in the gas-liquid mixed flow tube 842, and the filler 843 in the gas-liquid mixed flow tube 842 can prolong the mixing time of gas-liquid, so that the gas is fully dissolved in the water body, and the gas is ensured to stay in the water body for a long time, thereby improving the utilization efficiency of the gas, preventing the gas-liquid separation caused by the sudden change of air pressure, locking the gas in the water body to the greatest extent, and finally discharging the mixed gas-liquid fluid from the water outlet 913.
The experiment shows that the oxygen increasing effect of the supersaturated gas dissolving device is analyzed, dissolved oxygen is taken as an example, the water sample at the water outlet 813 of the gas-liquid dissolved gas tank 8 is taken by a beaker for oxygen increasing effect assessment, and the result shows that the gas concentration in water is greatly improved after the water is treated by the supersaturated gas dissolving device, the dissolved oxygen content of the water is up to 50mg/L, the oxygen utilization rate is up to more than 98%, and compared with 30% -60% of the microporous aeration utilization rate, the device can dissolve oxygen in the water in an supersaturated manner, and microorganisms in water supply provide a good living environment, so that mass propagation of the microorganisms is promoted, and the purposes of reducing various pollutants in the water and improving the ecological environment of the water are achieved.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (5)
1. A water body supersaturation air dissolving device is characterized in that: the device comprises an oxygenerator, an air compressor, a booster pump, a dissolved air tank and a protective filter; the water outlet of the pressurizing pump is connected with the water inlet of the protection filter, and the water outlet of the protection filter is connected with the water inlet of the dissolved air tank; the air outlet of the air compressor is connected with the air inlet of the oxygenerator, the air outlet of the oxygenerator is connected with the air inlet of the dissolved air tank, and the dissolved air tank is internally provided with a gas-liquid mixing bin, a liquid refiner and a gas-liquid mixer for refining and cutting the water body for many times;
the dissolved air tank comprises a shell, and the gas-liquid mixing bin and the gas-liquid mixer are arranged in the shell; the top of the shell is provided with an air inlet, the side part of the shell is provided with a liquid inlet, the bottom of the shell is provided with a water outlet, the gas-liquid mixing bin is connected with the oxygenerator through the air inlet, the liquid refiner is connected with the protective filter through the liquid inlet, the liquid refiner is arranged in the gas-liquid mixing bin, and the liquid outlet of the gas-liquid mixing bin is connected with the gas-liquid mixer;
the gas-liquid mixer comprises a fluid shunt pipe and a gas-liquid mixing pipe, the fluid shunt pipe is connected with a liquid outlet of the gas-liquid mixing bin, the gas-liquid mixing pipe is arranged on the fluid shunt pipe at intervals and is communicated with the fluid shunt pipe, a filler is arranged in the gas-liquid mixing pipe, and a water outlet at the bottom of the gas-liquid mixing pipe is communicated with a water outlet of the shell;
the gas-liquid mixing bin is internally provided with a multi-stage guide blade, the guide blade is fixed on the inner wall of the gas-liquid mixing bin, the thickness of the guide blade close to the inner wall of the gas-liquid mixing bin is large, the thickness of the guide blade far away from the inner wall of the gas-liquid mixing bin is small, the central angles corresponding to the guide blade are all 150 degrees, and the helix angle is 30 degrees;
a plurality of overflow discs are arranged in the liquid refiner, the overflow discs are horizontally arranged at intervals, a plurality of first micropores are formed in the overflow discs, and the sizes of the first micropores are sequentially reduced from top to bottom;
the guide vane comprises a clockwise guide vane and a counterclockwise guide vane.
2. The water body supersaturated gas dissolving device according to claim 1, wherein: the water inlet of the pressure pump is provided with a filter head, the liquid pipelines of the protection filter and the dissolved air tank are provided with a pressure gauge and a liquid stop valve, and the gas pipelines of the oxygen generator and the dissolved air tank are provided with a flowmeter and a gas stop valve.
3. The water body supersaturated gas dissolving device according to claim 1, wherein: the first micropores are one or more of round, diamond, square and honeycomb.
4. The water body supersaturated gas dissolving device according to claim 1, wherein: the water outlet of the fluid shunt tube is provided with a nano-filter disc, the nano-filter disc is made of high polymer materials, the nano-filter disc is provided with a plurality of second micropores, and the second micropores are round, diamond or square.
5. The water body supersaturated gas dissolving device according to claim 1, wherein: the filler is one or more of round, diamond, corrugated and honeycomb.
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| CN113929258A (en) * | 2021-10-22 | 2022-01-14 | 佛山市顺德区养德顺农业科技有限公司 | New water system |
| CN114699939B (en) * | 2022-04-11 | 2023-08-29 | 北京化工大学 | Supergravity gas mixing device for gradually cutting bubbles and application thereof |
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