CN217472846U - All-metal filter element for nuclear power station water treatment - Google Patents
All-metal filter element for nuclear power station water treatment Download PDFInfo
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- CN217472846U CN217472846U CN202122612060.7U CN202122612060U CN217472846U CN 217472846 U CN217472846 U CN 217472846U CN 202122612060 U CN202122612060 U CN 202122612060U CN 217472846 U CN217472846 U CN 217472846U
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 74
- 239000002184 metal Substances 0.000 title claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 10
- 238000001556 precipitation Methods 0.000 abstract description 8
- 229910004298 SiO 2 Inorganic materials 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 22
- 239000003365 glass fiber Substances 0.000 description 13
- 235000012239 silicon dioxide Nutrition 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 238000011001 backwashing Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
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- 229910001093 Zr alloy Inorganic materials 0.000 description 2
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- 239000011148 porous material Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
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- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- 238000004458 analytical method Methods 0.000 description 1
- HODFCFXCOMKRCG-UHFFFAOYSA-N bitolterol mesylate Chemical compound CS([O-])(=O)=O.C1=CC(C)=CC=C1C(=O)OC1=CC=C(C(O)C[NH2+]C(C)(C)C)C=C1OC(=O)C1=CC=C(C)C=C1 HODFCFXCOMKRCG-UHFFFAOYSA-N 0.000 description 1
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- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides an all-metal filter element for nuclear power station water treatment, which comprises a filter element main body, an upper end connector and a lower end sealing cover, wherein the interior of the filter element main body is hollow, one end of the filter element main body is connected with one end of the upper end connector, and the other end of the filter element main body is connected with one end of the lower end sealing cover; water in the water loop system of nuclear power station can pass the lateral wall of filter core main part gets into in the filter core main part, get into water in the filter core main part by filter core upper end connector flows, the filter core main part can be right water filters. The all-metal filter element comprisesSingle component, stable structure and no SiO 2 And (4) precipitation is carried out, so that the water quality requirement after filtration of the nuclear power plant water treatment filter is completely met.
Description
Technical Field
The utility model relates to an all metal filter element's manufacturing technical field, in particular to all metal filter element for nuclear power station water treatment.
Background
In order to maintain the purity of water quality in the nuclear power station water loop system, filters with different specifications and precisions are required to be used for filtering layer by layer, so that corrosion products and suspended solid particles in water are prevented from damaging the loop system, and the normal operation of the nuclear power station is ensured. The filter element used in nuclear power plant should ensure the safety and stability of the filter element structure, and has higher requirement for the filtering precision. At present, most of water treatment filter elements used in domestic nuclear power stations adopt nuclear grade glass fibers, which mainly depend on imports and have the problems of high price, long supply period, unsatisfactory after-sales service and the like. The substitute product cannot be really applied to the nuclear power field because the structural safety and the stability of the substitute product cannot meet the requirements, and although some domestic filter elements have application tests, the substitute product cannot meet the standard of replacing glass fiber filter elements.
The main component of the nuclear grade glass fiber is silicon dioxide (SiO) 2 ) The auxiliary component comprises Al 2 O 3 、CaO、MgO、Na 2 O+K 2 O, and the like. However, the diameter of the glass fiber is less than 1 μm, the surface area of the glass fiber is very large, so that the non-broken silicon-oxygen bonds and the broken silicon-oxygen bonds (dangling bonds) on the surface are very large, water molecules are very easily adsorbed, and SiO is very easily separated out in an acid medium 2 . SiO in nuclear island process system of pressurized water reactor nuclear power station 2 Precipitates are very prone to deposit on the fuel cladding, exacerbating corrosion of the zirconium alloy material in the system. Chinese patent CN103084005B discloses a method for modifying a filter element main body used by a nuclear-grade water filter element, wherein the filter element main body is SiO 2 The minimum precipitation amount still has 40PPM, and the requirement that the industrial standard is less than 0.8PPM is not met. Therefore, the glass fiber filter element main body has serious SiO when being soaked in the nuclear power working condition of the boron-containing medium for a long time 2 The problem of precipitation is very easy to deposit on the fuel cladding, the corrosion to metal pipe fittings and core zirconium alloy materials in the system is aggravated, and potential safety hazards are generated. SiO 2 2 The problem of precipitation is always the key difficulty in the research of the water filter element used in the nuclear power station.
The metal filter element is widely applied to the fields of coal chemical industry, petrochemical industry, biomedicine, aerospace, metallurgy, environmental protection and the like at present, but the high-precision metal filter element does not have a product and a technology which are applied in the field of nuclear power water filter elements in a large scale at present.
In view of the foregoing, there is a need for an all-metal filter element for nuclear power plant water treatment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a nuclear power station is all metallic filter for water treatment, this all metallic filter composition is single, stable in structureFixed and SiO-free 2 And (4) separating out, and completely meeting the water quality requirement after filtration by the nuclear power plant water treatment filter. Under the condition that the all-metal filter element is matched with an online automatic backwashing filter for use, the service cycle of the filter element can be greatly prolonged, the replacement frequency of the filter element is reduced, the great cost is saved for the post-treatment of products after radioactivity in the nuclear power field, and obvious economic and social benefits are generated.
In order to achieve the above object, the present invention provides the following technical solutions:
an all-metal filter element for nuclear power station water treatment comprises a filter element main body, an upper end connector and a lower end sealing cover, wherein the interior of the filter element main body is hollow, one end of the filter element main body is connected with one end of the upper end connector, and the other end of the filter element main body is connected with one end of the lower end sealing cover; water in the water loop system of nuclear power station can pass the lateral wall of filter core main part gets into in the filter core main part, get into water in the filter core main part by filter core upper end connector flows, the filter core main part can be right water filters.
Further, in the above all-metal filter element for nuclear power plant water treatment, the all-metal filter element further comprises an upper connecting ring and a lower connecting ring, wherein a first groove is formed in the periphery of one end of the upper end connecting head, a second groove is formed in the periphery of one end of the filter element main body, and the upper connecting ring covers the first groove and the second groove and connects the upper end connecting head with one end of the filter element main body; the periphery of the other end of the filter element main body is provided with a third groove, the periphery of one end of the lower end cover is provided with a fourth groove, and the lower connecting ring covers the third groove and the fourth groove and connects the lower end cover and the other end of the filter element main body.
Further, in the all-metal filter element for nuclear power plant water treatment, the filter element further comprises an inner tube, the inner tube is hollow, the filter element main body covers the periphery of the inner tube, and the filter element main body, the upper connecting ring, the lower connecting ring and the inner tube are connected through welding to form a whole; the upper end connector, the lower end sealing cover and the filter element main body, the upper connecting ring, the lower connecting ring and the whole formed by the inner tube are connected through assembly welding.
Further, in foretell nuclear power station is all metal filter for water treatment, the inner tube is used for right the filter core main part supports, the material of inner tube is stainless steel, the wall thickness of inner tube is 1 ~ 2mm, be provided with a plurality of holes on the inner tube, the percent opening of inner tube is 30 ~ 50%.
Further, in the above all-metal filter element for nuclear power plant water treatment, the filter element main body includes a metal fiber felt.
Further, in foretell full metal filter for nuclear power station water treatment, the filter core main part still includes the wire mesh protecting wire net, the inside and outside both sides face of metal fiber felt is provided with respectively the wire mesh protecting wire net, the wire mesh protecting wire net hugs closely on the inside and outside both sides face of metal fiber felt, the wire mesh protecting wire net be used for right the metal fiber felt provides the protection, the material of wire mesh protecting wire net is the stainless steel.
Further, in the above all-metal filter cartridge for nuclear power plant water treatment, the entire filter cartridge main body is cylindrical, and the filter cartridge main body is formed into a cylindrical wall in a pleated shape.
Further, in the all-metal filter element for nuclear power plant water treatment, the metal fiber felt is made of stainless steel.
Further, in the all-metal filter element for nuclear power plant water treatment, the wire mesh protecting net is a 20-100 mesh wire mesh; the all-metal filter element can realize the filtering precision of 0.1-100 mu m.
Further, in foretell full metal filter for nuclear power station water treatment, the upper end connector the lower extreme closing cap go up the go-between with the material of go-between is the stainless steel down.
The analysis can know, the utility model discloses an all metal filter core for nuclear power station water treatment, to current high price, change the frequency fast, supply the long period, the off-the-shelf service also unsatisfactory glass fiber filter core, all metal filter core price is moderate, the structure is reliable, be difficult to the damage, chemical compatibility is good with environmental suitability, can cooperate on-line automatic back flush filter to realize back flush recycling, greatly reduce the change frequency of nuclear power station water treatment filter core, possess long period application effect, effectively reduce use cost, and the good after treatment cost of saving radioactive filter core, and domestic production can guarantee that shorter supply of material period can also provide effective convenient after-sales service, can effectively provide huge economic and social.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a microstructure of a filter element main body according to an embodiment of the present invention.
Fig. 3 is a schematic sectional view along the direction a-a in fig. 1.
Fig. 4 is a schematic view of a part of the enlarged structure at the position I in fig. 3.
Description of reference numerals: 1, an upper end connector; 2, installing a connecting ring; 3 a filter element main body; 4, an inner pipe; 5, a lower connecting ring; 6, sealing the lower end of the container; 7 wire mesh protecting net.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. Each example is provided by way of explanation of the invention, and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention embrace such modifications and variations as fall within the scope of the appended claims and their equivalents.
In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "connected," "connected," and "disposed" used in the present invention should be understood broadly, and may be, for example, a fixed connection or a detachable connection; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
One or more examples of the invention are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention. As used herein, the terms "first," "second," and "third," etc. may be used interchangeably to distinguish one component from another, and are not intended to denote position or importance of the individual components.
As shown in fig. 1 to 4, according to an embodiment of the present invention, an all-metal filter element for nuclear power plant water treatment is provided, as shown in fig. 1, the all-metal filter element includes a filter element main body 3, an upper end connector 1 and a lower end cover 6, wherein the inside of the filter element main body 3 is hollow, one end of the filter element main body 3 is connected to one end of the upper end connector 1, and the other end of the filter element main body 3 is connected to one end of the lower end cover 6; the periphery of the other end of upper end connector 1 has the external screw thread, and the other end of upper end connector 1 is used for being connected with the filter of nuclear power station water loop system, and hydroenergy in the water loop system of nuclear power station can be by the lateral wall entering filter core main part 3 of filter core main part 3 in, and the water that gets into in the filter core main part 3 flows out through upper end connector 1, and filter core main part 3 can filter water. The filter element main body 3 is of an all-metal structure and can directly realize the filtering effectIn the production process of the filter element main body 3, other organic, inorganic or nonmetal additives are not used, so that the filter element main body 3 is made of a single material and has a stable and safe structure, and SiO can be fundamentally and completely eliminated 2 The problem of precipitation is solved, corrosion products in water and suspended solid particles are prevented from damaging a loop system, normal operation of the nuclear power station is guaranteed, and the problem that the existing glass fiber filter material is troublesome in the practical application process of a nuclear power station water treatment system is solved well.
Furthermore, the all-metal filter element also comprises an upper connecting ring 2 and a lower connecting ring 5, wherein a first groove is formed in the periphery of one end of the upper end connecting head 1, after the filter element main body 3 is subjected to closing-up treatment at two ends, a second groove is formed in the periphery of one end of the filter element main body 3, a third groove is formed in the periphery of the other end of the filter element main body 3, and the upper connecting ring 2 covers the first groove and the second groove and connects the upper end connecting head 1 with one end of the filter element main body 3; the periphery of one end of the lower end cover 6 is provided with a fourth groove, and the lower connecting ring 5 covers the third groove and the fourth groove and connects the lower end cover 6 with the other end of the filter element main body 3, so that the filter element main body 3 is conveniently connected with the upper connecting ring 2 and the lower connecting ring 5 respectively.
Furthermore, the filter element also comprises an inner tube 4, the inner tube 4 is hollow, the filter element main body 3 covers the periphery of the inner tube 4, and the inner tube 4 can support the whole strength of the filter element main body 3. Filter core main part 3, go up go-between 2, go up go-between 5 and inner tube 4 and pass through welded connection and form wholly, and the whole that upper end connector 1 and lower extreme closing cap 6 and filter core main part 3, go up go-between 2, go-between 5 and inner tube 4 formed is through the assembly welding connection to realize the whole sealed processing of full metal filter core.
Further, the inner tube 4 is used for supporting the filter element main body 3, the material of the inner tube 4 is 316L stainless steel, and the wall thickness of the inner tube 4 is 1 mm-2 mm (such as 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2 mm). The inner tube 4 is provided with a plurality of holes, and the opening rate of the inner tube 4 is 30-50% (30%, 35%, 40%, 45%, 50%).
Further, the filter element body 3 includes a metal fiber felt and a wire mesh guard 7.
Further, as shown in fig. 4, the inner side and the outer side of the metal fiber felt are respectively provided with a metal wire mesh protection net 7, the metal wire mesh protection nets 7 are tightly attached to the inner side and the outer side of the metal fiber felt, the metal wire mesh protection nets 7 are used for protecting the metal fiber felt, and the material of the metal wire mesh protection nets 7 is stainless steel.
Further, as shown in fig. 3, the entire filter element body 3 is cylindrical, and the filter element body 3 is pleated to form a cylindrical wall. The surface area of the filter element main body 3 is increased by adopting a folding mode for the filter element main body 3, and the filtering effect is improved. Namely, the inside and the outside of the metal fiber felt are respectively added with a layer of metal wire mesh protective net 7 to be folded to form the filter element main body 3, and the filtering area can be greatly increased by folding the filter material (the filter element main body 3). .
Furthermore, the material of the filter element main body 3 is stainless steel widely used for nuclear power plant related equipment and pipelines.
Further, the average pore size of the filter element main body 3 is determined by the filtering accuracy to be achieved by the filter element, and the wire mesh protecting net 7 adopts a wire mesh of 20-100 meshes (such as 20 meshes, 30 meshes, 40 meshes, 50 meshes, 60 meshes, 70 meshes, 80 meshes, 90 meshes and 100 meshes). The all-metal filter element is free of an added binder, the filter element main body 3 can form the aperture with specific precision by adopting a high-temperature sintering fusion and welding process, an obvious yield-fracture phenomenon exists, the elongation is 6-8%, and the strength is far higher than that of glass fiber, so that the all-metal filter element can realize the filtering effects with different filtering precisions of 0.1-100 mu m (different filtering precisions are realized by selecting filter materials with different apertures) and the like.
Furthermore, the upper end connector 1, the lower end sealing cover 6, the upper connecting ring 2 and the lower connecting ring 5 are all made of stainless steel.
This all-metal filter element's upper end connector 1, lower extreme closing cap 6, go up 5 and all can adopt the same kind of metal (stainless steel) machined part, and filter core main part 3, wire mesh protecting wire 7 and inner tube 4 all adopt the stainless steel of relevant equipment of nuclear power plant and pipeline wide application to make, make all-metal filter element's filter media composition single and all processing accessories be the metal material, all processing accessories accessible sintering, preparation technologies such as welding are assembled sealedly. In addition, the all-metal filter element has moderate price, reliable structure, difficult damage, low replacement frequency, good chemical compatibility and environmental suitability, can be matched with an online automatic backwashing filter for use, is backwashed for recycling, greatly prolongs the service cycle of the filter element, reduces the replacement frequency of the filter element, can save great cost for the post-treatment of products after radioactivity in the nuclear power field, and generates obvious economic and social benefits
The embodiment of the utility model provides an in, full metal filter core all adopts the metalwork because of filter media chemical composition is single, the filter core is whole, and sintering welding process all does not have the impurity binder, so can follow the material source and stop the filter core and soak SiO for a long time in the boracic medium of nuclear power operating mode 2 And (4) precipitation problem. Well solves the problems that the filter element of the water treatment filter of the prior nuclear power station has high price, high replacement frequency, long supply period and SiO generated in the filter material in the using process 2 The technical problem of precipitation can meet the water quality requirement after the filtration of the nuclear power station water treatment filter.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
1. in terms of chemical components, the SiO is soaked in a boron-containing medium under nuclear power working conditions for a long time aiming at the glass fiber filter material 2 The problem of appearing, the utility model discloses an all-metal filter core all adopts the metalwork because of filter media chemical composition is single, the filter core is whole, and sintering welding process all does not have the impurity binder, so can follow the material source and stop that the filter core soaks SiO in the boron-containing medium of nuclear power operating mode for a long time 2 And (4) precipitation problem.
2. In terms of mechanical properties, the all-metal filter element is free of added binder, stable in structure, capable of forming specific-precision pore diameter by adopting high-temperature sintering fusion and welding process, obvious in yield-fracture phenomenon, 6% -8% in elongation and far higher in strength than glass fiber, and capable of perfectly solving the problem of SiO (silicon dioxide) of the glass fiber filter element in the using process by design and manufacture 2 The problem of separation is troublesome.
3. In terms of using performance, aiming at the glass fiber filter element which is expensive, quick in replacement frequency, long in supply period and unsatisfactory in after-sale service at present, the all-metal filter element is moderate in price, reliable in structure, not easy to damage, low in replacement frequency and good in chemical compatibility and environmental adaptability, can be matched with an online automatic backwashing filter for use, realizes backwashing recycling, greatly reduces the replacement frequency of the water treatment filter element of the nuclear power station, has a long-period application effect, effectively reduces the use cost, saves the good after-treatment cost of the radioactive filter element, can ensure a short supply period, can provide effective and convenient after-sale service in domestic production, and can effectively provide huge economic and social benefits.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An all-metal filter element for nuclear power plant water treatment is characterized in that,
comprises a filter element main body, an upper end connector and a lower end sealing cover, wherein,
the filter element main body is hollow, one end of the filter element main body is connected with one end of the upper end connector, and the other end of the filter element main body is connected with one end of the lower end sealing cover;
the water in the water loop system of the nuclear power station can pass through the outer side wall of the filter element main body to enter the filter element main body, the water entering the filter element main body flows out from the connector at the upper end of the filter element, and the filter element main body can filter the water;
the filter element comprises a filter element main body and is characterized by further comprising an inner tube, wherein the inner tube is hollow, the filter element main body covers the periphery of the inner tube, and the inner tube is made of stainless steel;
the filter core main part includes the metal fiber felt, the material of metal fiber felt is the stainless steel, the upper end connector with the material of lower extreme closing cap is the stainless steel.
2. The all-metal filter element for nuclear power plant water treatment as recited in claim 1, further comprising an upper connection ring and a lower connection ring,
the periphery of one end of the upper end connector is provided with a first groove, the periphery of one end of the filter element main body is provided with a second groove,
the upper connecting ring covers the first groove and the second groove and connects the upper end connector with one end of the filter element main body;
the periphery of the other end of the filter element main body is provided with a third groove, the periphery of one end of the lower end sealing cover is provided with a fourth groove,
the lower connection ring covers the third groove and the fourth groove and connects the lower end cover and the other end of the filter element main body.
3. The all-metal filter element for nuclear power plant water treatment as recited in claim 2,
the filter element main body, the upper connecting ring, the lower connecting ring and the inner pipe are connected through welding to form a whole;
the upper end connector, the lower end sealing cover and the filter element main body, the upper connecting ring, the lower connecting ring and the whole formed by the inner tube are connected through assembly welding.
4. The all-metal filter element for nuclear power plant water treatment according to claim 1,
the inner tube is used for right the filter core main part supports, the wall thickness of inner tube is 1 ~ 2mm, be provided with a plurality of holes on the inner tube, the percent opening of inner tube is 30 ~ 50%.
5. The all-metal filter element for nuclear power plant water treatment according to claim 1,
the filter element main body further comprises a metal wire mesh protecting net, wherein the metal wire mesh protecting net is arranged on the inner side surface and the outer side surface of the metal fiber felt respectively, the metal wire mesh protecting net is tightly attached to the inner side surface and the outer side surface of the metal fiber felt, the metal wire mesh protecting net is used for protecting the metal fiber felt, and the metal wire mesh protecting net is made of stainless steel.
6. The all-metal filter element for nuclear power plant water treatment according to claim 1,
the filter element main body is cylindrical in shape as a whole, and the filter element main body is folded to form the cylindrical wall.
7. The all-metal filter element for nuclear power plant water treatment according to claim 5,
the wire mesh protecting net adopts a wire mesh with 20-100 meshes;
the all-metal filter element can realize the filtering precision of 0.1-100 mu m.
8. The all-metal filter element for nuclear power plant water treatment as recited in claim 2,
the upper connecting ring and the lower connecting ring are both made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122612060.7U CN217472846U (en) | 2021-10-28 | 2021-10-28 | All-metal filter element for nuclear power station water treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122612060.7U CN217472846U (en) | 2021-10-28 | 2021-10-28 | All-metal filter element for nuclear power station water treatment |
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| Publication Number | Publication Date |
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| CN217472846U true CN217472846U (en) | 2022-09-23 |
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| CN202122612060.7U Active CN217472846U (en) | 2021-10-28 | 2021-10-28 | All-metal filter element for nuclear power station water treatment |
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