CN113731189A - Silicon carbide ceramic filter membrane group for industrial cutting fluid regeneration - Google Patents
Silicon carbide ceramic filter membrane group for industrial cutting fluid regeneration Download PDFInfo
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- 239000002173 cutting fluid Substances 0.000 title claims abstract description 63
- 239000012528 membrane Substances 0.000 title claims abstract description 63
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 52
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000000919 ceramic Substances 0.000 title claims abstract description 32
- 230000008929 regeneration Effects 0.000 title claims abstract description 23
- 238000011069 regeneration method Methods 0.000 title claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 17
- 239000002699 waste material Substances 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims description 16
- 229910052580 B4C Inorganic materials 0.000 claims description 11
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 16
- 241000894006 Bacteria Species 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 244000005700 microbiome Species 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
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- 230000001580 bacterial effect Effects 0.000 description 2
- 210000004666 bacterial spore Anatomy 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- -1 silver ions Chemical class 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
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- 238000001953 recrystallisation Methods 0.000 description 1
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- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/021—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0041—Inorganic membrane manufacture by agglomeration of particles in the dry state
-
- 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
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0051—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity
- C04B38/0054—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof characterised by the pore size, pore shape or kind of porosity the pores being microsized or nanosized
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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
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3821—Boron carbides
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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
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/408—Noble metals
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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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5445—Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
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Abstract
The invention discloses a silicon carbide ceramic filter membrane group for industrial cutting fluid regeneration, which comprises a filter membrane layer, a transition layer and a support layer which are sequentially arranged from inside to outside along a flow passage, wherein the filter membrane layer, the transition layer and the support layer are formed by integrally sintering silicon carbide with the purity of more than 99.9 percent. The silicon carbide ceramic filter membrane group for industrial cutting fluid regeneration, which adopts the structure, is formed by integrally sintering 99.9 percent of silicon carbide, reduces lipophilicity by utilizing the characteristics of the silicon carbide, and can remove 99 percent of waste oil, scrap iron, 95 percent of microorganisms and bacteria in the cutting fluid.
Description
Technical Field
The invention relates to a cutting fluid regeneration technology, in particular to a silicon carbide ceramic filter membrane group for industrial cutting fluid regeneration.
Background
The cutting fluid is an industrial fluid used for cooling and lubricating a cutter and a machined part in the metal cutting and grinding process, is formed by scientifically compounding and matching various super-strong functional additives, and has the characteristics of good cooling performance, lubricating performance, antirust performance, oil removal and cleaning functions, anticorrosion function and easiness in dilution. The defects that the traditional soap-based emulsion is easy to smell in summer, difficult to dilute in winter and poor in antirust effect are overcome, the lathe paint is not affected, and the soap-based emulsion is suitable for cutting and grinding ferrous metal and belongs to the most advanced grinding product at present.
When the existing cutting cooling liquid is used, bacteria grow along with the prolonging of the service life, the cutting cooling liquid is easy to smell and deteriorate, and needs to be replaced regularly, particularly more frequently in summer. Viscous machine oil saponified oil and suspended mechanical chips contained in the old cutting fluid not only increase production cost but also influence machining precision if the old cutting fluid is not repeatedly used, so that the renovation of the cutting fluid is a problem which needs to be solved urgently.
The existing technology for regenerating the old cutting fluid in the true sense is a technology taking an alumina ceramic filter membrane as a core element, wherein the alumina ceramic membrane removes suspended particles, partial waste oil and partial microorganisms in the old cutting fluid, and then an ultraviolet process is utilized to remove partial microorganisms in the old cutting fluid.
The above approach has the following disadvantages:
1) in the prior art, because the lipophilicity of the aluminum oxide material is stronger, oil easily passes through the aluminum oxide film layer, and the effect of removing waste oil in the cutting fluid is poor.
2) The ceramic membrane made of alumina generates molten state in the sintering process, the number of blind tracks of the supporting layer is large, and the water yield is low.
3) The filter element has insufficient hardness, is easily scratched, suspended and damaged by hard particles in the cutting fluid and is frequently replaced; and the filter element is not resistant to oil stain and is easy to block,
4) the filtering aperture of the ceramic membrane is unreasonable, bacteria and suspended solids pass through the membrane body due to the excessively large aperture, so that the effects of removing bacteria and suspended solids are poor, and effective components in the cutting fluid can be intercepted due to the excessively small aperture, so that the effect of regenerating the cutting fluid is influenced.
Disclosure of Invention
The invention aims to provide a silicon carbide ceramic filter membrane group for industrial cutting fluid regeneration, which is formed by integrally sintering 99.9 percent of silicon carbide, reduces lipophilicity by utilizing the characteristics of the silicon carbide, and can remove 99 percent of waste oil, scrap iron, 95 percent of microorganisms and bacteria in the cutting fluid.
In order to achieve the purpose, the invention provides a silicon carbide ceramic filter membrane group for regenerating industrial cutting fluid, which comprises a filter membrane layer, a transition layer and a support layer which are sequentially arranged from inside to outside along a flow passage, wherein the filter membrane layer, the transition layer and the support layer are formed by integrally sintering silicon carbide with the purity of more than 99.9%.
Preferably, the content of the silicon carbide in the filter membrane layer, the transition layer and the support layer is 94%.
Preferably, micron-sized silver powder is added to the support layer.
Preferably, the addition amount of the micron-sized silver powder is 1%.
Preferably, the pore diameter of the filter membrane layer is in the range of 80-120 nm.
Preferably, boron carbide is added to each of the filter membrane layer, the transition layer and the support layer.
Preferably, the particle size of the boron carbide is 0.9 microns.
Preferably, the addition amount of the boron carbide is 5%.
Preferably, the waste liquid in a plurality of the flow-passing channels is distributed in a cross-flow manner.
The invention has the following beneficial effects:
1. 99% of waste oil, scrap iron, 95% of microorganisms and bacteria in the cutting fluid are removed by the silicon carbide ceramic membrane in a cross-flow circulating operation mode, and the remaining oily substances and most of the surfactant are retained in the penetrating fluid, so that the antirust, lubricating and radiating effects of the recycled cutting fluid are ensured, and the cutting fluid is regenerated.
2. The silicon carbide ceramic filtering membrane has the following advantages: (1) the filtering efficiency is high, the service life of the membrane element is long, and equipment purchase cost and maintenance cost are reduced for machining enterprises; (2) the waste oil and suspended solid removal effect is good; (3) the interception rate of the effective components is reduced, and the quality of the regenerated cutting fluid is improved; (4) the silicon carbide ceramic filter membrane has high sterilization rate, prolongs the service life of the cutting fluid, and reduces the annual supplement amount of new cutting fluid and the treatment amount of waste cutting fluid of enterprises. (5) By the regeneration treatment of the silicon carbide ceramic membrane on the cutting fluid, the supplement of 50% of new cutting fluid can be saved every year and the discharge of 50% of deteriorated cutting fluid can be reduced according to the calculation of once treatment per month, and on the one hand, for the society, the reduction and emission reduction of the cutting fluid reduce the environmental protection pressure due to the emission reduction of the waste cutting fluid; on the other hand, for enterprises, a large amount of cutting fluid purchasing cost and dangerous waste treatment cost (4000 yuan per ton of treatment cost) can be saved every year, and economic benefits are brought to the machining industry. In addition, along with the common use and freshness of the cutting fluid in the process, solid matters and waste oil are reduced, and the quality of a machined part is improved.
3. By adding boron carbide into the filtering membrane layer, the water passing capacity of the membrane body is large, the regeneration efficiency is improved, the membrane body is more resistant to scratches, and the service life of the membrane element is prolonged;
4. by adding the micron-sized silver powder into the supporting layer, silver ions are leaked out to kill bacterial spores in the filtering and regenerating process of the cutting fluid, so that the bacterial removal rate is improved;
5. the pore diameter range of the filtering membrane layer is concentrated at 80-120nm, so that the bacteria removal rate and the retention rate of effective components of the regenerated cutting fluid are improved.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view showing the arrangement of layers of a silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the arrangement of flow channels of a silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration according to an embodiment of the present invention.
Wherein: 1. a filtration membrane layer; 2. a transition layer; 3. and (4) a support layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
FIG. 1 is a schematic view showing the arrangement of layers of a silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration according to an embodiment of the present invention; fig. 2 is a layout diagram of a flow passage of a silicon carbide ceramic filter membrane group for industrial cutting fluid regeneration according to an embodiment of the present invention, as shown in fig. 1 and 2, the structure of the present invention includes a filter membrane layer 1, a transition layer 2 and a support layer 3 sequentially arranged from inside to outside along the flow passage, the filter membrane layer 1, the transition layer 2 and the support layer 3 are integrally sintered from silicon carbide with a purity of more than 99.9%, and with respect to the case where silicon carbide with a purity of 99.9% is used, the properties of hardness, oil stain resistance, blocking resistance, acid and alkali corrosion resistance, etc. of the sintered silicon carbide membrane body can be further improved by using a high-purity silicon carbide raw material. Since the old cutting fluid contains a large amount of free waste oil and emulsified oil (effective components), the film layer and the support of the silicon carbide ceramic film are required to be silicon carbide materials with the purity of more than 99.9%. The silicon carbide particles of the filtering membrane layer, the transition layer and the supporting layer are uniformly distributed, the neck of each layer of silicon carbide particles is well sintered, the strength and the aperture precision of the membrane are ensured, no sintering aid is added, so that the characteristics of ultrahigh hardness, high temperature resistance, acid-base corrosion resistance and high flux of the silicon carbide material are inherited, the flux of the silicon carbide material can reach 100 times that of the traditional organic membrane material and 3-5 times that of a common ceramic membrane, and the silicon carbide ceramic microfiltration and ultrafiltration membrane is formed by recrystallization and sintering at the high temperature of 2400 ℃, so that the surfaces of the silicon carbide crystal particles are smooth and round, and the filtering membrane layer, the transition layer and the supporting layer are free of sealing air holes and channels; meanwhile, the integral sintering is adopted, so that the film layer is not easy to fall off, the film layer can be recycled, the service life of the film body is greatly prolonged, the integral sintering is more suitable for a back washing process, the film holes are not easy to block, the service life is as long as 15 years, and the integral sintering can be specially used for filtering the cutting fluid.
Preferably, the content of the silicon carbide in the filter membrane layer, the transition layer and the support layer is 94%, and micron-sized silver powder is added in the support layer 3. Preferably, the addition amount of the micron-sized silver powder is 1%, 1% of the micron-sized silver powder is added into the supporting layer 3 in the manufacturing process of the silicon carbide ceramic film aiming at the regeneration of the cutting fluid, and a small amount of silver ions are leaked out in the filtering and regenerating process of the cutting fluid to kill bacterial spores, so that the bacterial removal rate is improved.
Preferably, the aperture range of the filter membrane layer 1 is 80-120nm, the aperture range of the filter membrane layer is controlled to be concentrated at 80-120nm in the membrane layer manufacturing process of the silicon carbide ceramic membrane aiming at the regeneration of the cutting fluid, and the bacteria removal rate and the retention rate of effective components of the regenerated cutting fluid are improved.
Preferably, boron carbide is added to each of the filter membrane layer 1, the transition layer 2, and the support layer 3. Preferably, the particle size of the boron carbide is 0.9 microns. Preferably, the addition amount of the boron carbide is 5%, and aiming at the fact that hard solids contained in the cutting fluid have strong scratching capability on the film layer during filtering, 5% of boron carbide with the particle size of 0.9 micrometer is added into the material of the silicon carbide filtering film layer 1 for mixing, so that the hardness of the whole film body is improved, the film layer is more resistant to scratching of hard suspended matters in the cutting fluid, and the service life is prolonged in use.
Preferably, the waste liquid in the plurality of flow-passing channels is distributed in a cross-flow manner, and the small molecular liquid permeates a film layer on the wall of the pipeline under the action of high-speed flow and liquid pressure in the pipeline in a cross-flow filtering manner, so that the large molecular solid matters are intercepted and concentrated, and the solid-liquid separation and the oil-water separation of the liquid are realized. 99% of waste oil, scrap iron, 95% of microorganisms and bacteria in the cutting fluid are removed by adopting a cross-flow circulating operation mode, and the remaining oily substances and most of the surfactant are retained in the penetrating fluid, so that the antirust, lubricating and radiating effects of the recycled cutting fluid are ensured, and the cutting fluid is regenerated.
Therefore, the silicon carbide ceramic filter membrane group for regenerating the industrial cutting fluid, which adopts the structure, is formed by integrally sintering 99.9 percent of silicon carbide, reduces lipophilicity by utilizing the characteristics of the silicon carbide, and can remove 99 percent of waste oil, scrap iron, 95 percent of microorganisms and bacteria in the cutting fluid.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a carborundum ceramic filter membrane group for industry cutting fluid is regenerated, includes along the filtration rete, transition layer and the supporting layer that flow channel set gradually from inside to outside, its characterized in that: the filtering membrane layer, the transition layer and the supporting layer are formed by integrally sintering silicon carbide with purity of more than 99.9%.
2. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 1, wherein: the content of the silicon carbide in the filter membrane layer, the transition layer and the support layer is 94%.
3. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 2, wherein: micron-sized silver powder is added to the supporting layer.
4. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 3, wherein: the addition amount of the micron-sized silver powder is 1%.
5. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 1, wherein: the pore diameter range of the filter membrane layer is 80-120 nm.
6. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 2, wherein: boron carbide is added in the filter membrane layer, the transition layer and the support layer.
7. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 6, wherein: the particle size of the boron carbide is 0.9 micron.
8. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 6, wherein: the addition amount of the boron carbide is 5%.
9. The silicon carbide ceramic filter membrane module for industrial cutting fluid regeneration as claimed in claim 1, wherein: and the waste liquid in the plurality of flow passage channels is distributed in a cross flow manner.
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