CN111039428A - Ozone aeration cavity manufacturing method - Google Patents
Ozone aeration cavity manufacturing method Download PDFInfo
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- CN111039428A CN111039428A CN201911323158.1A CN201911323158A CN111039428A CN 111039428 A CN111039428 A CN 111039428A CN 201911323158 A CN201911323158 A CN 201911323158A CN 111039428 A CN111039428 A CN 111039428A
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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
- C02F7/00—Aeration of stretches of water
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- 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
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
- B01F23/23105—Arrangement or manipulation of the gas bubbling devices
- B01F23/2312—Diffusers
-
- 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
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
- B01F23/23105—Arrangement or manipulation of the gas bubbling devices
- B01F23/2312—Diffusers
- B01F23/23123—Diffusers consisting of rigid porous or perforated material
- B01F23/231231—Diffusers consisting of rigid porous or perforated material the outlets being in the form of perforations
-
- 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
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
- B01F23/23105—Arrangement or manipulation of the gas bubbling devices
- B01F23/2312—Diffusers
- B01F23/23126—Diffusers characterised by the shape of the diffuser element
- B01F23/231262—Diffusers characterised by the shape of the diffuser element having disc shape
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/784—Diffusers or nozzles for ozonation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
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- 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 method for manufacturing an ozone aeration cavity, which comprises the steps of mixing 66-70% of silicon dioxide powder, 23-26% of carbon powder and 7-8% of calcium lignosulphonate powder in percentage by weight, adding water, uniformly stirring, precipitating mixed liquor, then pumping and squeezing the slurry, and pressing the obtained mixed slurry into a spherical structure; adding pure silicon dioxide powder into water, uniformly stirring, performing slurry pumping and mud squeezing treatment after slurry settling, and pressing the obtained mud into a paraboloid flanged structure, wherein the paraboloid is positioned in the middle of the flanged structure; coating AB glue on the peripheral edge of the pressed spherical structure; bonding the spherical structure on the flange structure, and arranging the spherical structure and the paraboloid in the same direction; sintering the bonded whole at high temperature to form a whole; and laser drilling is carried out on the sintered paraboloid, the aperture is controlled to be between 1mm and 1.5mm, and the axis of the hole is parallel to the axis of the paraboloid. The ozone aeration cavity manufactured by the method reduces aeration resistance, pressure and energy loss, and improves aeration quality.
Description
Technical Field
The invention relates to a manufacturing method of an aeration device, in particular to a manufacturing method of an ozone aeration device.
Background
Ozone aeration is generally carried out by mixing ozone gas with water to obtain a water-gas mixed fluid by using a pump or a water injector, and then sending the mixed fluid into the interface of the water body to be aerated through an aeration disc. The prior aeration technology adopts disc type aeration, namely a plane disc type and a spherical disc type.
The plane aeration is that the ozone water-gas mixed fluid is aerated through the micropores on a flat plate. Because a certain aeration area is needed for plane aeration, a medium pipeline input into the aeration disc is only made into a gradually expanding pipe, and the pipe is small and large. The axial direction of the large part of micropores on the aeration disc is not consistent with the flow velocity direction of the ozone water-gas fluid medium from the gradually expanding pipe, so that only a small part of the medium flowing through the gradually expanding pipe is directly communicated with the micropores on the aeration disc to enter an aeration interface, and the large part of the medium can rebound to form resistance. Similarly, for the spherical aeration disc, due to the existence of the spherical surface, the axes of the micropores on the spherical surface are not completely in the same direction with the water-gas mixed fluid of the medium conveying pipe, and a small part of the water-gas mixed fluid passes through the micropores on the spherical surface and most of the water-gas mixed fluid rebounds back to form resistance.
In the process of movement of the fluid, all the particles move linearly along the tube axis direction completely, the particles are not mixed with each other, the flow state without mutual interference is called laminar flow, if the moving particles move along the tube axis direction and are also mixed with transverse mixing, the flow lines are mixed, the movement is called turbulent flow, the resistance is increased sharply, and the energy loss is increased. In addition, the flow velocity of the ozone water-gas mixed fluid in the conveying circular pipe is distributed in a paraboloid manner, so that no matter the ozone water-gas mixed fluid is conveyed to the interface of the water body to be aerated, the ozone water-gas mixed fluid can not be conveyed to the interface of the water body to be aerated at the same time no matter the aeration disc is of a plane type or a spherical type.
Plane aeration and spherical aeration are both surface aeration, the aeration disc has large resistance and uneven aeration, and a part of ozone components are easily decomposed before aeration. Because ozone is composed of oxygen molecules carrying an oxygen atom, it is determined to be in a temporary storage state, and the decomposition speed of ozone in aqueous solution is much faster than that in gas phase, just because the ozone mixed with aqueous vapor fluid before aeration is decomposed too fast, it is required that ozone must be delivered to the interface of the water body to be aerated quickly and uniformly.
Disclosure of Invention
The invention aims to solve the technical problem of providing a manufacturing process of an ozone aeration cavity, and the defect of too fast decomposition of ozone mixed aqueous vapor fluid can be effectively reduced by utilizing the aeration cavity manufactured by the process.
In order to solve the technical problem, the method for manufacturing the ozone aeration cavity comprises the following steps of mixing 66-70 wt% of silicon dioxide powder, 23-26 wt% of carbon powder and 7-8 wt% of calcium lignosulfonate powder, adding water, uniformly stirring, precipitating the mixed solution, pumping and squeezing the slurry, and pressing the obtained mixed slurry into a spherical structure; adding pure silicon dioxide powder into water, uniformly stirring, performing slurry pumping and mud squeezing treatment after slurry settling, and pressing the obtained mud into a paraboloid flanged structure, wherein the paraboloid is positioned in the middle of the flanged structure; coating AB glue on the peripheral edge of the pressed spherical structure; bonding the spherical structure on the flange structure, and arranging the spherical structure and the paraboloid in the same direction; sintering the bonded whole at high temperature to form a whole; and laser drilling is carried out on the sintered paraboloid, the aperture is controlled to be between 1mm and 1.5mm, and the axis of the hole is parallel to the axis of the paraboloid.
According to a further optimization scheme of the technical scheme, the artificial fiber with the length of 10-30 mm and the diameter of 10-15 um is added into the mixed powder of the silicon dioxide powder, the carbon powder and the calcium lignosulfonate powder.
According to a further optimization scheme of the technical scheme, the sintered whole is firstly placed into vacuum equipment for vacuum pumping treatment, so that the sintered whole is kept in a vacuum environment for more than 30 seconds.
According to the further optimization scheme of the technical scheme, high-pressure gas is continuously injected into the cavity formed by the spherical surface, the paraboloid and the flange structure through the holes in the paraboloid, and the injection time of the high-pressure gas is more than 1 minute.
According to a further optimization scheme of the technical scheme, the mixed mud contains 67.5% of silicon dioxide powder, 25% of carbon powder and 7.5% of calcium lignosulfonate powder.
According to the further optimization scheme of the technical scheme, the compression molding pressure is 6Mpa, the sintering temperature is 1080 ℃, and the heat preservation time is 30 minutes.
The outer spherical surface of the aeration cavity manufactured by the manufacturing method of the ozone aeration cavity is naturally provided with micron-sized through holes, the paraboloid is provided with millimeter-sized through holes through laser processing, the middle part of the paraboloid is provided with a curved surface cavity with a closed structure, and the whole structure is integrally sintered. Ozone water-gas mixed fluid enters the curved surface cavity at a constant speed through the millimeter holes, a common pressure state is formed in the curved surface cavity, and then permeates to an aerated water body through the micron holes, so that the aeration resistance, the aeration pressure and the energy loss are greatly reduced in the whole process, and the aeration quality is greatly improved.
Drawings
FIG. 1 is a structural view of an ozone aeration chamber.
Detailed Description
Referring to fig. 1, the method for manufacturing the ozone aeration cavity mainly adopts a ceramic manufacturing process, and comprises the following steps of mixing 67.5% by weight of silicon dioxide powder, 25% by weight of carbon powder and 7.5% by weight of calcium lignosulfonate powder, and adding fibers with the length of 10mm-20mm and the diameter of 10 um-15 um into the mixed powder. And then adding water, uniformly stirring, precipitating the mixed solution, pumping and squeezing the slurry, and pressing the obtained mixed slurry into a spherical structure 1 with the thickness within 10mm under the pressure of 6 MPa.
Adding silicon dioxide powder into water, uniformly stirring, performing slurry pumping and mud squeezing treatment after slurry deposition, pressing the obtained mud into an integrated structure of a paraboloid 2 and a flange structure 7 with the thickness within 10mm under the pressure of 6Mpa, controlling the outer diameter of the flange 7 to be between 150mm and 200mm, and positioning the paraboloid 2 in the middle of the flange structure 7. Coating AB glue on the peripheral edge 6 of the pressed spherical structure; bonding the spherical structure 1 on the flange structure 7, and arranging the spherical structure 1 and the paraboloid 7 in the same direction to form a curved cavity 5; and sintering the bonded whole into a whole at high temperature of 1080 ℃ for 30 minutes. And laser drilling is carried out on the sintered paraboloid, so that holes are uniformly distributed on the paraboloid, the hole diameter is controlled to be between 1mm and 1.5mm, and the axis of each hole is parallel to the axis of the paraboloid.
And putting the sintered whole into vacuum equipment for vacuumizing treatment, and keeping the sintered whole in a vacuum environment for more than 30 seconds.
And continuously injecting high-pressure gas into the curved cavity 5, wherein the injection time of the high-pressure gas is kept for more than 1 minute.
Or injecting high-pressure gas into the curved cavity 5 and then performing vacuum treatment, wherein the high-pressure and vacuum treatment mainly aims at removing fibers which become slag after sintering and discharging the fiber slag to form a through hole.
Though through holes can be naturally formed on the spherical structure 1 by adding the pore-forming agent carbon powder and the binder calcium lignosulfonate, the hole forming rate is only 30%, and the requirement of aeration through hole amount cannot be well met. At present, no corresponding mature technology exists for directly processing a large number of micron-sized through holes on a ceramic surface. Through in this scheme will be replaced by the hole through sintering the fibre position after adding the fibre wherein, the pore-forming rate can improve to more than 70, very big requirement that has satisfied aeration through-hole volume. The ozone can be fully cut into small bubbles by the micron-sized through holes 3, the aeration resistance is small, and the gas-liquid interface is uniformly diffused.
The ozone aeration cavity is made of corrosion-resistant and strong-oxidation-resistance ceramic materials. After the ceramic powder is made into slurry, the slurry is formed in a die and then is sintered at high temperature. The spherical structure 1 is provided with micron-sized through holes 3 which are arranged in all directions and are formed naturally by sintering after being pressed and formed by adopting a ceramic micropore manufacturing process, and the aperture is micron-sized. The axes of the holes on the paraboloid 2 are parallel to the axis of the paraboloid sphere, namely, the holes are in the same direction with the ozone-water-gas mixed fluid.
From the fluid mechanics principle, we know that when fluid flows in a pipe, the velocity of fluid particles is changed along the pipe diameter, the velocity at the pipe wall is zero, and the velocity at the center of the pipe is maximum. On any section of the pipeline, the velocity distribution of the laminar flow in the circular tube is in a paraboloid state. Therefore, the curved surface for leading in the ozone-water-gas mixed fluid is designed into a paraboloid with a certain opening, so that the aeration medium with the highest central speed of the circular tube and the medium with zero speed at the tube wall can enter the aeration cavity at the same time, and because the speed direction of the entering water-gas mixed fluid is the same as the axial line of the millimeter-level through hole 4 on the paraboloid 2, the resistance can be ignored.
The holes of the spherical structure 1 are micron-sized, the holes on the spherical structure 1 can be distributed irregularly, the axes of the holes can be straight lines or curved lines, and the holes can be arranged in a mixed and disorderly manner. The holes on the paraboloid 2 are millimeter-sized, and the holes are more in and less out, so that the water-gas mixed fluid in the aeration cavity forms a dynamic pressure cavity, and according to the hydrostatic principle, the depth of the cavity can be ignored, so that the pressures in all directions in the cavity are equal.
If we express the entering ozone-water-gas mixed fluid by a vector V, the direction of the fluid is consistent with the axis of the millimeter-scale through hole 4, only the size is different, the fluid can simultaneously reach the curved surface cavity 5 when passing through the parabola 2, then the speed and the direction are adjusted in the curved surface cavity 5, so that the speed passing through each hole on the outer curved surface 1 is equal, and the direction is automatically adjusted to be the same as the coincidence of the hole axis. For example, the optimal structure state is represented by a vector V1 for the ozone water-gas mixed fluid at the point A, a vector V2 for the ozone water-gas mixed fluid at the point B, and a vector Vn for the N point, and the fluid in the curved surface cavity automatically adjusts to be coincident with the normal lines f1 and f2 … … fn of each point when passing through each micron hole from the vectors V1 and V2 …. The millimeter holes on the paraboloid 2 play a role in guiding flow, the flow rates are different in size and consistent in flow velocity direction, and simultaneously enter the curved surface cavity 5, and the micron-sized micropores distributed on the outer curve 1 play a role in cutting water-gas mixed fluid macromolecules and finally enter the exposed water body 8.
Because the outer curved surface is a spherical surface, micron-sized micropores which are uniformly distributed in all directions can be manufactured more conveniently. The speed direction of the ozone-water-gas mixed fluid is enabled to be in the same direction with the micron hole axis and change along with the distribution position of the micron hole axis, so that the resistance and pressure loss are greatly reduced, the energy consumption is reduced, and the aeration is more uniform. If the micron-sized through holes 3 of the spherical structure 1 are arranged irregularly, the aeration will be partially affected, but the effect is much better than that of the existing equipment compared with the ideal structure. The current process can not realize an ideal structure.
Claims (7)
1. The manufacturing method of the ozone aeration cavity is characterized in that: mixing 66-70 wt% of silicon dioxide powder, 23-26 wt% of carbon powder and 7-8 wt% of calcium lignosulfonate powder, adding water, uniformly stirring, precipitating the mixed solution, pumping and squeezing the mixed solution to obtain mixed mud, and pressing the mixed mud into a spherical structure; adding pure silicon dioxide powder into water, uniformly stirring, performing slurry pumping and mud squeezing treatment after slurry settling, and pressing the obtained mud into a paraboloid flanged structure, wherein the paraboloid is positioned in the middle of the flanged structure; coating AB glue on the peripheral edge of the pressed spherical structure; bonding the spherical structure on the flange structure, and arranging the spherical structure and the paraboloid in the same direction; sintering the bonded whole at high temperature to form a whole; and laser drilling is carried out on the sintered paraboloid, the aperture is controlled to be between 1mm and 1.5mm, and the axis of the hole is parallel to the axis of the paraboloid.
2. The ozone aeration chamber manufacturing method according to claim 1, wherein: adding artificial fiber with length of 10-30 mm and diameter of 10-15 um into the mixed powder of silicon dioxide powder, carbon powder and calcium lignosulfonate powder.
3. The method for manufacturing an ozone aeration chamber according to claim 2, wherein: and putting the sintered whole into vacuum equipment for vacuumizing treatment, and keeping the sintered whole in a vacuum environment for more than 30 seconds.
4. The method for manufacturing an ozone aeration chamber according to claim 3, wherein: and continuously injecting high-pressure gas into a cavity formed by the spherical surface, the paraboloid and the flange structure through holes on the paraboloid, wherein the injection time of the high-pressure gas is more than 1 minute.
5. The ozone aeration chamber manufacturing method according to claim 4, wherein: the mixed mud comprises 67.5% of silicon dioxide powder, 25% of carbon powder and 7.5% of calcium lignosulfonate powder.
6. The ozone aeration chamber manufacturing method according to claim 5, wherein: the thickness of the spherical surface and the paraboloid is within 10mm, and the outer diameter of the flange is between 150mm and 200 mm.
7. The ozone aeration chamber manufacturing method according to claim 6, wherein: the compression molding pressure is 6Mpa, the sintering temperature is 1080 ℃, and the heat preservation time is 30 minutes.
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