CN116803958B - Preparation method of ceramic filter element and sewage filtering catalytic oxidation device comprising ceramic filter element - Google Patents
Preparation method of ceramic filter element and sewage filtering catalytic oxidation device comprising ceramic filter element Download PDFInfo
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- CN116803958B CN116803958B CN202310765201.XA CN202310765201A CN116803958B CN 116803958 B CN116803958 B CN 116803958B CN 202310765201 A CN202310765201 A CN 202310765201A CN 116803958 B CN116803958 B CN 116803958B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 141
- 239000010865 sewage Substances 0.000 title claims abstract description 76
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 43
- 230000003647 oxidation Effects 0.000 title claims abstract description 32
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 32
- 238000001914 filtration Methods 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 14
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 14
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000009826 distribution Methods 0.000 claims description 36
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 27
- 238000005868 electrolysis reaction Methods 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 21
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 12
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229920002748 Basalt fiber Polymers 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000007800 oxidant agent Substances 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- 229910001080 W alloy Inorganic materials 0.000 claims description 6
- 238000009713 electroplating Methods 0.000 claims description 6
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- VJFCXDHFYISGTE-UHFFFAOYSA-N O=[Co](=O)=O Chemical compound O=[Co](=O)=O VJFCXDHFYISGTE-UHFFFAOYSA-N 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 27
- 238000011282 treatment Methods 0.000 abstract description 7
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 4
- 150000004706 metal oxides Chemical class 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 238000005406 washing Methods 0.000 description 9
- 235000019441 ethanol Nutrition 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000000197 pyrolysis Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000428 cobalt oxide Inorganic materials 0.000 description 2
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 2
- LBFUKZWYPLNNJC-UHFFFAOYSA-N cobalt(ii,iii) oxide Chemical compound [Co]=O.O=[Co]O[Co]=O LBFUKZWYPLNNJC-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 238000004075 wastewater filtration Methods 0.000 description 1
Classifications
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
- C04B41/90—Coating or impregnation for obtaining at least two superposed coatings having different compositions at least one coating being a metal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- 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
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Filtering Materials (AREA)
Abstract
The invention belongs to the technical field of sewage treatment equipment, and discloses a preparation method of a ceramic filter piece and a sewage filtering catalytic oxidation device comprising the ceramic filter piece, wherein the preparation method of the ceramic filter piece comprises the following steps: 1) Manufacturing a ceramic tube; 2) Manufacturing a filter material; 3) Manufacturing a ceramic filter piece: spraying a filter material on the surface of a ceramic tube, drying for 5-7 days in a nitrogen atmosphere at 25 ℃, heating the filter material in a nitrogen atmosphere at 260-280 ℃, pressing and forming under 100-120MPa, soaking the formed part in silica sol with the concentration of 1.5% for 48 hours, and drying to obtain the ceramic filter. The ceramic filter element is obtained by spraying the filter material outside the ceramic tube and then pressing the ceramic tube, and the projections on the surface of the ceramic tube enable the sprayed filter material to be more easily attached to the surface of the ceramic tube, so that wastewater can contact the filter material on the outer layer of the ceramic filter element through pores, and the oxidation is accelerated under the synergistic effect of various nano metal oxides, so that the oxidation efficiency is further improved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment equipment, and relates to a preparation method of a ceramic filter element and a sewage filtering catalytic oxidation device comprising the ceramic filter element.
Background
When biomass pyrolysis gasification treatment is carried out, pyrolysis gas contains a large amount of oil phase components, various organic acid components, various combustible gas components, carbon ash dust and the like, and water spraying is generally adopted to purify the pyrolysis gas, so that a large amount of washing wastewater is generated. The ceramic membrane is often used for filtering the washing wastewater in treatment, but the washing wastewater contains a large amount of suspended matters, so that the pores of the ceramic membrane are easily blocked, the back flushing of the ceramic membrane is also difficult, and in addition, the oil phase contained in the washing wastewater is easily adsorbed on the ceramic membrane, and the pores of the ceramic membrane are also blocked, so that the service life of the ceramic membrane is greatly reduced. Therefore, there is a need to improve the functionality of ceramic membranes and to increase the useful life of ceramic membranes.
Disclosure of Invention
Aiming at the technical problem that the ceramic membrane pores are easy to be blocked by the seed impurities of the wastewater washed by biomass pyrolysis gas, the invention provides a preparation method of a ceramic filter element and a wastewater filtering catalytic oxidation device comprising the ceramic filter element, so that the wastewater is subjected to catalytic oxidation, electrolysis and filtration, the oil phase in the wastewater is not easy to be adsorbed on the ceramic filter element, the back flushing resistance is reduced, and the service life of the ceramic filter element is prolonged.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a preparation method of a ceramic filter element, which comprises the following steps:
1) Manufacturing a ceramic tube:
sintering spherical aluminum oxide particles with the particle size below 50 mu m into a ceramic tube with bulges on the surface, electroplating a nickel-tungsten alloy anticorrosive layer on the surface of the ceramic tube, and effectively improving the conductivity of a nonmetallic material by an alloy plating layer;
2) Manufacturing a filter material:
The filter material comprises the following components in parts by weight: 6-7 parts of oxidant powder, 8-10 parts of spherical aluminum oxide particles, 8-10 parts of spherical graphite, 13-15 parts of polytetrafluoroethylene, 3-5 parts of polymethyl methacrylate, 30-45 parts of absolute ethyl alcohol and 5-7 parts of basalt fiber, adding each component in the filter material into an ethanol water solution of methyl silicate with the dosage of 15.5% of the total mass of the filter material, and stirring to obtain a cement-shaped filter material;
3) Manufacturing a ceramic filter piece:
Spraying a filter material on the surface of a ceramic tube, drying for 5-7 days in a nitrogen atmosphere at 25 ℃, heating the filter material in a nitrogen atmosphere at 260-280 ℃, then pressing and forming under 100-120 MPa, soaking the formed part in silica sol (solution pH is approximately equal to 9) with the concentration of 1.5% for 48 hours, and drying to obtain the ceramic filter.
Preferably, the oxidant powder is selected from one or more of titanium dioxide, manganese dioxide, and cobalt oxide, and the particle size of the oxidant powder is not more than 5nm.
Preferably, the pore size of the ceramic filter is less than 50nm.
Preferably, the middle part of the cross section of the ceramic filter element is provided with an arc-shaped bulge, two ends of the arc-shaped bulge are horizontal, and the adjacent ceramic filter elements are connected through horizontal sections at the two ends of the arc-shaped bulge.
The methyl silicate and the silica gel help the oxidant powder to react with basalt fibers and aluminum oxide to generate other composite silicate minerals, so that the fusion and adhesive strength of the material are enhanced; basalt fibers help to increase the overall strength of the ceramic tube.
The invention also provides a sewage filtering catalytic oxidation device which comprises a sewage inlet main pipe, a plurality of sewage inlet branch pipes, a plurality of sewage outlet branch pipes, a sewage outlet main pipe, a plurality of rows of sewage inlet distribution components and a plurality of rows of ceramic filter pieces; the plurality of sewage water inlet branch pipes are communicated with the sewage water inlet main pipe, and the plurality of sewage water outlet branch pipes are communicated with the sewage water outlet main pipe; the multiple rows of sewage water inlet distribution components and the multiple rows of ceramic filter pieces are arranged at intervals; the multi-row sewage water inlet distribution component is used as a positive electrode of catalytic electrolysis, and the multi-row ceramic filter piece is used as a negative electrode of the catalytic electrolysis;
Each row of sewage water inlet distribution components consists of a plurality of liquid distribution pipes and a catalytic electrolysis plate welded between two adjacent liquid distribution pipes, each row of sewage water inlet distribution components is embedded into each sewage water inlet distribution pipe, each row of ceramic filter pieces is formed by closely arranging a plurality of ceramic filter pieces prepared by the preparation method of the ceramic filter pieces, and the upper end of each ceramic filter piece is connected with each sewage water outlet distribution pipe through a steel pipe.
Preferably, the liquid distribution pipe is also provided with water distribution holes.
Preferably, the catalytic electrolysis plate is uniformly provided with water permeable holes.
Compared with the prior art, the invention has the beneficial effects that:
The ceramic filter element is obtained by spraying the filter material outside the ceramic tube and then pressing and forming the ceramic tube, and the protrusions on the surface of the ceramic tube enable the sprayed filter material to be more easily attached to the surface of the ceramic tube; the ceramic tube of the inner layer forms pores on the surface after sintering, and the filter material of the outer layer also forms pores on the surface after pressing, so that wastewater can contact the filter material of the outer layer of the ceramic filter element through the pores, and the wastewater is oxidized under the synergistic effect of various nano metal oxides, thereby further improving the oxidation efficiency.
The sewage filtering catalytic oxidation device ensures that washing wastewater is subjected to various treatments of catalytic oxidation, electrolysis and filtration, the catalytic electrolysis plate is continuously dissolved in the electrolysis process, iron-based flocculation sediment is generated, impurity ions in the sewage are accelerated to oxidize, and the viscosity of the wastewater is reduced; on the one hand, the ceramic filter element intercepts sediment or insoluble matters formed in the catalytic oxidation and electrolysis processes, on the other hand, the soluble matters are contacted with the filter material on the outer layer of the ceramic filter element, the oxidation is accelerated under the synergistic effect of various nano metal oxides, the oxidation efficiency is further improved, and in addition, the spherical graphite and the spherical aluminum oxide added in the filter material reduce the lipophilicity of the surface of the ceramic filter element, so that the oil phase in wastewater is not easy to be adsorbed on the ceramic filter element, and the backwash resistance is also reduced.
Drawings
FIG. 1 is a schematic diagram of a sewage filtering catalytic oxidation device according to the present invention.
FIG. 2 is a side view of the apparatus for filtering, catalyzing and oxidizing sewage according to the present invention.
FIG. 3 is a schematic view of the structure of a sewage inflow distribution assembly in the sewage filtering catalytic oxidation apparatus of the present invention.
FIG. 4 is a schematic structural view of a ceramic filter member in the sewage filtering catalytic oxidation apparatus of the present invention.
FIG. 5 is a schematic cross-sectional view of a ceramic filter element in a wastewater filtration catalytic oxidation apparatus according to the present invention.
FIG. 6 is a schematic structural view of a ceramic tube in the sewage filtering catalytic oxidation apparatus of the present invention.
The reference numbers in the drawings: 1 is a sewage inlet main pipe, 2 is a sewage inlet branch pipe, 3 is a sewage outlet branch pipe, 4 is a sewage outlet main pipe, 5 is a ceramic filter piece, 501 is a ceramic pipe, 502 is a filter material, 503 is a bulge, 6 is a sewage inlet distribution component, 601 is a liquid distribution pipe, 602 is a catalytic electrolysis plate, and 603 is a water distribution hole.
Detailed Description
The following examples are illustrative of the present invention and are not intended to limit the scope of the invention. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated. The test methods in the following examples are conventional methods unless otherwise specified.
The spherical aluminum oxide particles used in the following examples were purchased from Jiangsu Tianshi New Material Co., ltd., specification: less than or equal to 50 mu m; titanium dioxide powder was purchased from the winning chemical company, specification: less than or equal to 5 mu m; manganese dioxide powder was purchased from the company of the manganese industry, large Ji, hunan, specification: less than or equal to 5 mu m; the cobalt oxide powder is purchased from BoHuasi nanotechnology (Ningbo) limited company, and the specification is less than or equal to 5 mu m; spherical graphite was purchased from Jiangsu Tianshi New Material Co., ltd., specification: less than or equal to 50 mu m; basalt fiber was purchased from tham, inc. With a specification of 15 μm diameter and 10mm length. Polytetrafluoroethylene is purchased from the company of qi hong polymeric materials, the specification: less than or equal to 25 mu m; polymethyl methacrylate is purchased from the company of Hefei-Ming high molecular materials, inc., specification: less than or equal to 25 mu m. The methyl silicate content in the aqueous ethanol solution of methyl silicate was 5.5%, and the ethanol content in the aqueous ethanol solution was 75%. The methyl silicate content in the aqueous ethanol solution of methyl silicate was 5.5%, and the ethanol content in the aqueous ethanol solution was 75%.
Example 1
The preparation method of the ceramic filter piece comprises the following steps:
1) Manufacturing a ceramic tube 501:
Sintering spherical aluminum oxide particles with the particle size of less than 50 mu m into a ceramic tube 501 (see figure 6) with a protrusion 503 on the surface, and electroplating a nickel tungsten alloy anticorrosive layer on the surface of the ceramic tube 501; the surface pore size of the ceramic tube 501 is less than 5 μm.
2) Filter material 502 was prepared:
The filter material comprises the following components in parts by weight (each part corresponds to 1kg in the present example): 7 parts of titanium dioxide powder, 10 parts of spherical aluminum oxide particles, 10 parts of spherical graphite, 15 parts of polytetrafluoroethylene, 13 parts of polymethyl methacrylate, 40 parts of absolute ethyl alcohol and 5 parts of basalt fibers, adding ethanol aqueous solution of methyl silicate with the dosage of 15.5% of the total mass of the filter material into each component of the filter material, and stirring to obtain a cement-like filter material 502.
3) Manufacturing a ceramic filter element 5:
The ceramic filter 5 is obtained by spraying the filter material 502 on the surface of the ceramic tube 501, drying the ceramic tube in a nitrogen atmosphere at 25 ℃ for 7 days, heating the filter material 502 in a nitrogen atmosphere at 280 ℃, pressing the ceramic tube under 120MPa, soaking the ceramic tube in silica sol with the concentration of 1.5% for 48 hours, and drying the ceramic tube. As shown in FIG. 5, the ceramic filter element 5 has arc-shaped bulges at the middle part of the cross section and two horizontal ends, and the surface aperture is smaller than 50nm.
Example two
The preparation method of the ceramic filter piece comprises the following steps:
1) Manufacturing a ceramic tube 501:
Sintering spherical aluminum oxide particles with the particle size of less than 50 mu m into a ceramic tube 501 (see figure 6) with a protrusion 503 on the surface, and electroplating a nickel tungsten alloy anticorrosive layer on the surface of the ceramic tube 501;
2) Filter material 502 was prepared:
The filter material comprises the following components in parts by weight (each part corresponds to 1kg in the present example): 3 parts of titanium dioxide powder, 3 parts of manganese dioxide powder, 8 parts of spherical aluminum oxide particles, 10 parts of spherical graphite, 13 parts of polytetrafluoroethylene, 5 parts of polymethyl methacrylate, 40 parts of absolute ethyl alcohol and 5 parts of basalt fiber, adding each component in the filter material into an ethanol water solution of methyl silicate with the dosage of 15.5% of the total mass of the filter material, and stirring to obtain a daub-like filter material 502;
3) Manufacturing a ceramic filter element 5:
the ceramic filter 5 is obtained by spraying the filter material 502 on the surface of the ceramic tube 501, drying the ceramic tube in a nitrogen atmosphere at 25 ℃ for 7 days, heating the filter material 502 in a nitrogen atmosphere at 280 ℃, pressing the ceramic tube under 120MPa, soaking the ceramic tube in silica sol with the concentration of 1.5%, and drying the ceramic tube.
Example III
The preparation method of the ceramic filter piece comprises the following steps:
1) Manufacturing a ceramic tube 501:
Sintering spherical aluminum oxide particles with the particle size of less than 50 mu m into a ceramic tube 501 (see figure 6) with a protrusion 503 on the surface, and electroplating a nickel tungsten alloy anticorrosive layer on the surface of the ceramic tube 501;
2) Filter material 502 was prepared:
The filter material comprises the following components in parts by weight (each part corresponds to 1kg in the present example): 2 parts of titanium dioxide powder, 3 parts of manganese dioxide powder, 1 part of cobalt oxide powder, 10 parts of spherical aluminum oxide particles, 10 parts of spherical graphite, 13 parts of polytetrafluoroethylene, 5 parts of polymethyl methacrylate, 40 parts of absolute ethyl alcohol and 7 parts of basalt fibers, adding each component in the filter material into an ethanol water solution of methyl silicate with the dosage of 15.5% of the total mass of the filter material, and stirring to obtain a cement-shaped filter material 502;
3) Manufacturing a ceramic filter element 5:
the ceramic filter 5 is obtained by spraying the filter material 502 on the surface of the ceramic tube 501, drying the ceramic tube in a nitrogen atmosphere at 25 ℃ for 7 days, heating the filter material 502 in a nitrogen atmosphere at 280 ℃, pressing the ceramic tube under 120MPa, soaking the ceramic tube in silica sol with the concentration of 1.5%, and drying the ceramic tube.
Example IV
The preparation method of the ceramic filter piece comprises the following steps:
1) Manufacturing a ceramic tube 501:
Sintering spherical aluminum oxide particles with the particle size of less than 50 μm into a ceramic tube 501 (see figure 6) with bulges 503 on the surface, and electroplating a nickel tungsten alloy anticorrosive layer on the surface of the ceramic tube 501 to increase the conductivity of the ceramic tube;
2) Filter material 502 was prepared:
The filter material comprises the following components in parts by weight (each part corresponds to 1kg in the present example): 3 parts of manganese dioxide powder, 3 parts of cobalt oxide middle powder, 10 parts of spherical aluminum oxide particles, 10 parts of spherical graphite, 15 parts of polytetrafluoroethylene, 3 parts of polymethyl methacrylate, 40 parts of absolute ethyl alcohol and 5 parts of basalt fibers, adding each component in the filter material into an ethanol water solution of methyl silicate with the dosage of 15.5% of the total mass of the filter material, and stirring to obtain a cement-like filter material 502;
3) Manufacturing a ceramic filter element 5:
the ceramic filter 5 is obtained by spraying the filter material 502 on the surface of the ceramic tube 501, drying the ceramic tube in a nitrogen atmosphere at 25 ℃ for 7 days, heating the filter material 502 in a nitrogen atmosphere at 280 ℃, pressing the ceramic tube under 120MPa, soaking the ceramic tube in silica sol with the concentration of 1.5%, and drying the ceramic tube.
Example five
As shown in fig. 1 and 2, the invention relates to a sewage filtering catalytic oxidation device, which comprises a sewage inlet main pipe 1, a plurality of sewage inlet branch pipes 2, a plurality of sewage outlet branch pipes 3, a sewage outlet main pipe 4, a plurality of rows of sewage inlet distribution components 6 and a plurality of rows of ceramic filter pieces 5; a plurality of sewage water inlet branch pipes 2 are communicated with a sewage water inlet main pipe 1, and a plurality of sewage water outlet branch pipes 3 are communicated with a sewage water outlet main pipe 4; the multiple rows of sewage inflow water distribution components 6 and the multiple rows of ceramic filter elements 5 are arranged at intervals; the multi-row sewage inflow water distribution assembly 6 is used as an anode of catalytic electrolysis, and the multi-row ceramic filter 5 is used as a cathode of the catalytic electrolysis.
As shown in fig. 3, each row of the sewage inflow distribution assembly 6 is composed of a plurality of liquid distribution pipes 601 and catalytic electrolysis plates 602 welded between two adjacent liquid distribution pipes 601, water distribution holes 603 are further formed in the liquid distribution pipes 601, water permeable holes are uniformly formed in the catalytic electrolysis plates 602, and each row of the sewage inflow distribution assembly 6 is embedded into each sewage inflow branch pipe 2. As shown in fig. 4, each row of ceramic filter elements 5 is formed by closely arranging a plurality of ceramic filter elements 5, and the upper end of each ceramic filter element 5 is connected with each sewage outlet water branch pipe 3 through a seamless steel pipe.
Taking a biomass pyrolysis gas washing wastewater of a certain factory as an example, the test content of each component in the wastewater is shown in table 1. The ceramic filter 5 obtained by the preparation method of the embodiments 1-4 is used for forming 4 sets of different sewage filtering catalytic oxidation devices, the catalytic electrolysis plate 602 and the liquid distribution pipe 601 are made of cast iron materials, the sewage filtering catalytic oxidation device is formed by assembling and adding the shell according to the method, and the sewage water inlet distribution assembly 6 is provided with 8 rows to serve as the positive electrode of catalytic electrolysis; 8 rows of ceramic filter elements 5 are arranged and serve as negative electrodes for catalytic electrolysis, and the treatment capacity of each sewage filtering catalytic oxidation device is 1m 3 of filter materials for filtering 20L/h of sewage. And switching on 220V power supply.
The washing wastewater enters the device from the top through the cavity of the liquid distribution pipe 601, the catalytic electrolysis plate 602 is continuously dissolved in the electrolysis process, iron-based flocculation sediment is generated, impurity ions in the wastewater are accelerated to oxidize, and the viscosity of the wastewater is reduced; the ceramic filter element 5 intercepts sediment or insoluble substances formed in the catalytic oxidation and electrolysis processes, and enables soluble substances to contact the filter material 502 on the outer layer of the ceramic filter element 5, so that the oxidation is accelerated under the synergistic effect of various nano metal oxides, the oxidation efficiency is further improved, and in addition, spherical graphite and spherical aluminum oxide added into the filter material 502 reduce the lipophilicity of the surface of the ceramic filter element 5, so that the oil phase in wastewater is not easy to be adsorbed on the ceramic filter element 5, and the backwash resistance is also reduced. After catalytic oxidation, electrolysis and filtration, the wastewater enters the wastewater outlet branch pipe 3 through a seamless steel pipe through the middle cavity of the ceramic pipe 501, and is collected in the wastewater outlet main pipe 4 and then is discharged out of the device. The wastewater detection indexes after the primary treatment by the sewage filtering catalytic oxidation device are shown in table 2.
TABLE 1 washing wastewater composition
| Detecting content | Numerical value |
| Suspension, mg/l | 200 |
| Ammonia nitrogen, mg/l | 35 |
| COD，mg/l | 800 |
| BOD5，mg/l | 100 |
| pH | 9 |
| Petroleum, mg/l | 10 |
| Conductivity, μs/cm | 1800 |
TABLE 2 wastewater detection index after one treatment
In combination with tables 1 and 2, it can be seen that: the indexes of the washing wastewater treated by the different sewage filtering catalytic oxidation devices for one time are greatly reduced.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and other embodiments can be easily made by those skilled in the art through substitution or modification according to the technical disclosure in the present specification, so that all changes and modifications made in the principle of the present invention shall be included in the scope of the present invention.
Claims (7)
1. A method of making a ceramic filter comprising the steps of:
1) Ceramic tube (501) was fabricated:
Sintering spherical aluminum oxide particles with the particle size of less than 50 mu m into a ceramic tube (501) with bulges (503) on the surface, and electroplating a nickel tungsten alloy anticorrosive layer on the surface of the ceramic tube (501);
2) Filter material (502) was produced:
The filter material comprises the following components in parts by weight: 6-7 parts of oxidant powder, 8-10 parts of spherical aluminum oxide particles, 8-10 parts of spherical graphite, 13-15 parts of polytetrafluoroethylene, 3-5 parts of polymethyl methacrylate, 30-45 parts of absolute ethyl alcohol and 5-7 parts of basalt fibers, adding each component in the filter material into an ethanol water solution of methyl silicate with the dosage of 15.5% of the total mass of the filter material, and stirring to obtain a cement-shaped filter material (502);
3) Manufacturing a ceramic filter element (5):
And spraying a filter material (502) on the surface of the ceramic tube (501), drying for 5-7 days in a nitrogen atmosphere at 25 ℃, heating the filter material (502) in a nitrogen atmosphere at 260-280 ℃, pressing and forming under 100-120 MPa, soaking the formed part in silica sol with the concentration of 1.5% for 48 hours, and drying to obtain the ceramic filter (5).
2. The method according to claim 1, wherein the oxidizing agent powder is one or more selected from the group consisting of titanium dioxide, manganese dioxide, and cobalt trioxide, and the oxidizing agent powder has a particle size of not more than 5 nm.
3. The method of claim 1, wherein the ceramic filter has a pore size of less than 50 nm a.
4. The preparation method according to claim 1, wherein the ceramic filter element (5) has an arc-shaped protrusion in the middle of its cross section and two horizontal ends.
5. The sewage filtering, catalyzing and oxidizing device is characterized by comprising a sewage water inlet main pipe (1), a plurality of sewage water inlet branch pipes (2), a plurality of sewage water outlet branch pipes (3), a sewage water outlet main pipe (4), a plurality of rows of sewage water inlet distribution components (6) and a plurality of rows of ceramic filter pieces (5); a plurality of sewage water inlet branch pipes (2) are communicated with a sewage water inlet main pipe (1), and a plurality of sewage water outlet branch pipes (3) are communicated with a sewage water outlet main pipe (4); the multiple rows of sewage inflow water distribution components (6) and the multiple rows of ceramic filter pieces (5) are arranged at intervals; the multi-row sewage inflow water distribution component (6) is used as an anode of catalytic electrolysis, and the multi-row ceramic filter (5) is used as a cathode of the catalytic electrolysis;
Each row of sewage water inlet distribution components (6) consists of a plurality of liquid distribution pipes (601) and a catalytic electrolysis plate (602) welded between two adjacent liquid distribution pipes (601), each row of sewage water inlet distribution components (6) is embedded into each sewage water inlet branch pipe (2), each row of ceramic filter pieces (5) is formed by closely arranging a plurality of ceramic filter pieces (5) prepared by adopting the preparation method according to any one of claims 1-3, and the upper end of each ceramic filter piece (5) is connected with each sewage water outlet branch pipe (3) through a steel pipe.
6. The sewage filtering catalytic oxidation device according to claim 5, wherein the liquid distribution pipe (601) is further provided with a water distribution hole (603).
7. The sewage filtering catalytic oxidation device according to claim 5, wherein the catalytic electrolysis plate (602) is uniformly provided with water permeable holes.
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