High-performance composite filter element and application use thereof

Abstract

A high-performance composite filter element and the use thereof. The composite filter element (5) comprises a filter precision control layer and a support and protection layer, wherein the filter precision control layer is a metal tube (2), and at least part of the metal tube (2) has pores or micropores (4) penetrating through the wall of the metal tube; and the support and protection layer is at least one metal porous mesh (3), and the support and protection layer wraps at least part of the filter precision control layer.

Description

High-performance Composite Filter Element and APPLICATION Use thereof CROSS-REFERENCE TO RELATED APPLICATIONSThe present application claims priority to Chinese Patent Application No. 202410232014.X, filed with the China National Intellectual Property Administration on February 29, 2024, the entire contents of which are incorporated herein by reference.WHAT IS CLAIMED IS: 1. A metallic composite filter element, comprising a filtration precision control layer and a support and protection layer, wherein the filtration precision control layer is a metal tube, the support and protection layer comprises at least one layer of metallic porous mesh, and the support and protection layer encloses at least a portion of the filtration precision control layer.2. The metallic composite filter element according to claim 1, wherein the metallic composite filter element has a length of from 10 mm to 2,000 mm.3. The metallic composite filter element according to claim 2, wherein the metallic composite filter element has a length of from 50 mm to 1,700 mm.4. The metallic composite filter element according to claim 1, wherein at least one end of the metallic composite filter element comprises a connecting portion having a length of 1 mm to 100 mm.5. The metallic composite filter element according to claim 4, wherein the connecting portion is a connecting portion for flange welding, quick connector connection, or threaded connection.6. The metallic composite filter element according to any one of claims 1 to 5, wherein the metallic composite filter element comprises a filtration area surrounded by the support and protection layer, and optionally, at least one non‑perforated area.7. The metallic composite filter element according to claim 6, wherein the metallic composite filter element comprises two or more filtration areas and at least one non‑perforated area.8. The metallic composite filter element according to claim 6, wherein the metallic composite filter element comprises two, three, four, five, six or more filtration areas, and non‑perforated areas between respective filtration areas.9. The metallic composite filter element according to claim 6, wherein the filtration area has a length of from 1 mm to 300 mm, or from 10 mm to 250 mm.10. The metallic composite filter element according to claim 6, wherein the non‑perforated area has a length of from 1 mm to 50 mm, or from 5 mm to 20 mm.11. The metallic composite filter element according to claim 6, wherein a length ratio of the filtration area to the non‑perforated area is 50:1 or less, or 30:1 or less.12. The metallic composite filter element according to any one of claims 1 to 5, wherein the filtration precision control layer is a hollow cylinder, comprising a wall having an outer surface, an inner surface, and a wall thickness T.13. The metallic composite filter element according to claim 12, wherein the wall thickness T is less than 1.0 mm, or is 0.1 mm to 0.7 mm or 0.1 mm to 0.5 mm.14. The metallic composite filter element according to any one of claims 1 to 5, wherein the metal tube has an outer diameter d of less than 70 mm, from5 mm to 30 mm, or from 10 mm to 25 mm.15. The metallic composite filter element according to any one of claims 1 to 5, wherein the metal tube comprises a perforated area L2, and optionally, a non‑perforated area L3.16. The metallic composite filter element according to claim 15, wherein the metal tube comprises two or more perforated areas L2 and at least one non‑perforated area L3.17. The metallic composite filter element according to claim 15, wherein the metal tube comprises two, three, four, five, six or more perforated areas, and non‑perforated areas between respective perforated areas.18. The metallic composite filter element according to claim 15, wherein the perforated area L2 has a length of from 1 mm to 300 mm or from 10 mm to 250 mm.19. The metallic composite filter element according to claim 15, wherein the non‑perforated area L3 has a length of from 1 mm to 50 mm or from 5 mm to 20 mm.20. The metallic composite filter element according to claim 15, wherein a ratio of a total length of the perforated area L2 to a total length of the non‑perforated area L3 is 50:1 or less, or 30:1 or less.21. The metallic composite filter element according to claim 15, wherein the metal tube is a stainless steel tube.22. The metallic composite filter element according to claim 21, wherein the stainless steel tube is one selected from 201, 202, 301, 321, 303, 314, 305, 309, 304, 304L, 317, 316Si, 316, 316L, 309S, and SUS310S.23. The metallic composite filter element according to claim 22, wherein the stainless steel tube is one selected from 321, 304, 304L, 316, and 316L.24. The metallic composite filter element according to any one of claims 1 to 5, wherein the metal tube further comprises, at at least one end, a non-punched area L1, with a length of 1 mm to 100 mm.25. The metallic composite filter element according to any one of claims 1 to 5, wherein a pore shape of the metal tube is circular, elongated, or a combination thereof.26. The metallic composite filter element according to claim 25, wherein micropores or pores of the metal tube have a shape with a uniform size from the outer surface to the inner surface, each having a diameter δ; or the micropores or pores of the metal tube are forward‑conical, having a larger opening diameter δ1 at the outer surface and a smaller opening diameter δ2 at the inner surface; or the micropores or pores of the metal tube are inverted conical, having a smaller opening diameter δ2 at the outer surface and a larger opening diameter δ1 at the inner surface.27. The metallic composite filter element according to claim 26, wherein δ is in a range of 0.001 mm to 0.1 mm; the diameter δ1 is in a range of 0.001 mm to 0.1 mm; or the diameter δ2 is in a range of 0.0005 mm to 0.08 mm.28. The metallic composite filter element according to claim 26, wherein the pores or micropores are precisely drilled simultaneously or individually in a stainless steel thin-walled tube using a high-power laser drilling device.29. The metallic composite filter element according to claim 26, wherein the metal tube is formed from a tubular or flat metal sheet portion with laser-drilled pores or micropores therein.30. The metallic composite filter element according to claim 26, wherein the micropores or pores are arranged in a linear pattern, a rectangular pattern, a offset triangular pattern, or a Pokal dot pattern.31. The metallic composite filter element according to claim 26, wherein the micropores or pores extend through a wall of the metal tube, wherein the wall has a thickness T.32. The metal composite filter element according to claim 26, wherein, when the pores or micropores are conical, a taper angle of the pores or micropores is from 0° to10°.33. The metal composite filter element according to claim 26, wherein at least one of the shape, diameter, and orientation of the pores or micropores in the metal tube is uniform.34. The metal composite filter element according to claim 33, wherein for conical pores, all larger openings are located on the outer surface; or, the taper angles of the pores or micropores are consistent.35. The metal composite filter element according to any one of claims 1 to 5, wherein the porosity of the metal tube of the filtration precision control layer is from 1% to 60%.36. The metal composite filter element according to any one of claims 1 to 5, wherein the support and protection layer comprises one or more layers of sintered metal wire mesh, sintered metal powder, metal fiber membrane, or sintered metal felt.37. The metal composite filter element according to claim 36, wherein the support and protection layer comprises one or more layers of sintered metal wire mesh.38. The metal composite filter element according to claim 36, wherein the support and protection layer comprises one layer, two layers, three layers, or four layers or more layers of square-mesh-type sintered metal wire mesh or fine-mesh-type sintered metal wire mesh.39. The metal composite filter element according to claim 36, wherein the pore sizes of all layers in the support and protection layer are either all greater than or all less than the pore size of the filtration precision control layer.40. The metal composite filter element according to claim 36, wherein for conical pores, the pore sizes of all layers in the support and protection layer are all greater than the larger pore size δ1 of the filtration precision control layer; or for conical pores, the pore sizes of all layers in the support and protection layer are all less than the smaller pore size δ2 of the filtration precision control layer.41. The metal composite filter element according to claim 36, wherein a plurality of layers in the support and protection layer habe pore sizes that are identical; or a plurality of layers in the support and protection layer has pore sizes that increase or decrease layer by layer.42. The metal composite filter element according to claim 36, wherein the support and protection layer has a total thickness of from 0.01 mm to 1 mm, a filtration pore size of from 1 mesh to 200 mesh, and a porosity of from 1% to 60%.43. The metal composite filter element according to any one of claims 1 to 5, wherein a bonding process between the filtration precision control layer and the support and protection layer is selected from one or more of welding, winding, weaving, and sintering.44. Use of the metal composite filter element according to any one of claims 1 to 43 as an internal filter in a slurry bed reactor.45. A method for filtering in a slurry bed reactor using the metal composite filter element according to any one of claims 1 to 43 as an internal filter, wherein the metal composite filter element undergoes a filtration cycle, a soaking cycle, and a backflushing cycle during operation, and wherein a part of a composite filter element assembly always has a portion in the filtration cycle, a portion in the soaking cycle, and portion in the backflushing cycle.46. The method according to claim 45, wherein a filtration pressure difference during the filtration cycle is 1 KPa to 1,000 KPa, or 5 KPa to100 KPa; and a filtration time is 5 min to 200 min or 10 min to 100 min;soaking is performed in the slurry bed reactor, and a filter cake is scoured using a turbulent slurry, and wherein a soaking cycle time is 1 min to 20 min, or 2 min to10 min; ora time for single backflushing is 1s to 20s or 3s to10s; a pressure of a backflushing medium is 1 KPa to 1000 KPa, or 10 KPa to 500 KPa; a temperature of the backflushing medium is 100°C to 300°C or 150°C to 200°C; and the number of backflushing operations is 1 to 10, or 3 to 6.47. The method according to claim 45, wherein a backflushing medium is a gas or liquid, and is selected from fresh reaction gas, circulating reaction gas, inert gas, and clean filtrate obtained by filtration.48. The method according to claim 45, wherein the backflushing mode is regeneration by gas backflushing alone, regeneration by liquid backflushing alone, or a combination of gas backflushing and liquid backflushing.49. The method according to claim 45, wherein during the backflushing cycle, a backflushing medium is backflushed into the top of a composite filter element vertically arranged, or the bottom of the composite filter element vertically arranged; or a backflushing medium is alternately backflushed into the top and the bottom of the composite filter element.  1. ABSTRACTA high-performance composite filter element and the use thereof. The composite filter element (5) comprises a filter precision control layer and a support and protection layer, wherein the filter precision control layer is a metal tube (2), and at least part of the metal tube (2) has pores or micropores (4) penetrating through the wall of the metal tube; and the support and protection layer is at least one metal porous mesh (3), and the support and protection layer wraps at least part of the filter precision control layer. 

Claims

 1. A metallic composite filter element, comprising a filtration precision control layer and a support and protection layer, wherein the filtration precision control layer is a metal tube, the support and protection layer comprises at least one layer of metallic porous mesh, and the support and protection layer encloses at least a portion of the filtration precision control layer. 2. The metallic composite filter element according to claim 1, wherein the metallic composite filter element has a length of from 10 mm to 2,000 mm. 3. The metallic composite filter element according to claim 2, wherein the metallic composite filter element has a length of from 50 mm to 1,700 mm.  4. The metallic composite filter element according to claim 1, wherein at least one end of the metallic composite filter element comprises a connecting portion having a length of 1 mm to 100 mm.  5. The metallic composite filter element according to claim 4, wherein the connecting portion is a connecting portion for flange welding, quick connector connection, or threaded connection.  6. The metallic composite filter element according to any one of claims 1 to 5, wherein the metallic composite filter element comprises a filtration area surrounded by the support and protection layer, and optionally, at least one non‑perforated area. 7. The metallic composite filter element according to claim 6, wherein the metallic composite filter element comprises two or more filtration areas and at least one non‑perforated area. 8. The metallic composite filter element according to claim 6, wherein the metallic composite filter element comprises two, three, four, five, six or more filtration areas, and non‑perforated areas between respective filtration areas.  9. The metallic composite filter element according to claim 6, wherein the filtration area has a length of from 1 mm to 300 mm, or from 10 mm to 250 mm.  10. The metallic composite filter element according to claim 6, wherein the non‑perforated area has a length of from 1 mm to 50 mm, or from 5 mm to 20 mm.  11. The metallic composite filter element according to claim 6, wherein a length ratio of the filtration area to the non‑perforated area is 50:1 or less, or 30:1 or less.  12. The metallic composite filter element according to any one of claims 1 to 5, wherein the filtration precision control layer is a hollow cylinder, comprising a wall having an outer surface, an inner surface, and a wall thickness T.  13. The metallic composite filter element according to claim 12, wherein the wall thickness T is less than 1.0 mm, or is 0.1 mm to 0.7 mm or 0.1 mm to 0.5 mm.  14. The metallic composite filter element according to any one of claims 1 to 5, wherein the metal tube has an outer diameter d of less than 70 mm, from5 mm to 30 mm, or from 10 mm to 25 mm.  15. The metallic composite filter element according to any one of claims 1 to 5, wherein the metal tube comprises a perforated area L2, and optionally, a non‑perforated area L3.  16. The metallic composite filter element according to claim 15, wherein the metal tube comprises two or more perforated areas L2 and at least one non‑perforated area L3.  17. The metallic composite filter element according to claim 15, wherein the metal tube comprises two, three, four, five, six or more perforated areas, and non‑perforated areas between respective perforated areas.  18. The metallic composite filter element according to claim 15, wherein the perforated area L2 has a length of from 1 mm to 300 mm or from 10 mm to 250 mm.  19. The metallic composite filter element according to claim 15, wherein the non‑perforated area L3 has a length of from 1 mm to 50 mm or from 5 mm to 20 mm.  20. The metallic composite filter element according to claim 15, wherein a ratio of a total length of the perforated area L2 to a total length of the non‑perforated area L3 is 50:1 or less, or 30:1 or less.  21. The metallic composite filter element according to claim 15, wherein the metal tube is a stainless steel tube.  22. The metallic composite filter element according to claim 21, wherein the stainless steel tube is one selected from 201, 202, 301, 321, 303, 314, 305, 309, 304, 304L, 317, 316Si, 316, 316L, 309S, and SUS310S.  23. The metallic composite filter element according to claim 22, wherein the stainless steel tube is one selected from 321, 304, 304L, 316, and 316L.  24. The metallic composite filter element according to any one of claims 1 to 5, wherein the metal tube further comprises, at at least one end, a non-punched area L1, with a length of 1 mm to 100 mm.  25. The metallic composite filter element according to any one of claims 1 to 5, wherein a pore shape of the metal tube is circular, elongated, or a combination thereof.  26. The metallic composite filter element according to claim 25, wherein micropores or pores of the metal tube have a shape with a uniform size from the outer surface to the inner surface, each having a diameter δ; or the micropores or pores of the metal tube are forward‑conical, having a larger opening diameter δ1 at the outer surface and a smaller opening diameter δ2 at the inner surface; or the micropores or pores of the metal tube are inverted conical, having a smaller opening diameter δ2 at the outer surface and a larger opening diameter δ1 at the inner surface.  27. The metallic composite filter element according to claim 26, wherein δ is in a range of 0.001 mm to 0.1 mm; the diameter δ1 is in a range of 0.001 mm to 0.1 mm; or the diameter δ2 is in a range of 0.0005 mm to 0.08 mm.  28. The metallic composite filter element according to claim 26, wherein the pores or micropores are precisely drilled simultaneously or individually in a stainless steel thin-walled tube using a high-power laser drilling device.  29. The metallic composite filter element according to claim 26, wherein the metal tube is formed from a tubular or flat metal sheet portion with laser-drilled pores or micropores therein.  30. The metallic composite filter element according to claim 26, wherein the micropores or pores are arranged in a linear pattern, a rectangular pattern, a offset triangular pattern, or a Pokal dot pattern.  31. The metallic composite filter element according to claim 26, wherein the micropores or pores extend through a wall of the metal tube, wherein the wall has a thickness T.  32. The metal composite filter element according to claim 26, wherein, when the pores or micropores are conical, a taper angle of the pores or micropores is from 0° to10°.  33. The metal composite filter element according to claim 26, wherein at least one of the shape, diameter, and orientation of the pores or micropores in the metal tube is uniform.  34. The metal composite filter element according to claim 33, wherein for conical pores, all larger openings are located on the outer surface; or, the taper angles of the pores or micropores are consistent.  35. The metal composite filter element according to any one of claims 1 to 5, wherein the porosity of the metal tube of the filtration precision control layer is from 1% to 60%.  36. The metal composite filter element according to any one of claims 1 to 5, wherein the support and protection layer comprises one or more layers of sintered metal wire mesh, sintered metal powder, metal fiber membrane, or sintered metal felt.  37. The metal composite filter element according to claim 36, wherein the support and protection layer comprises one or more layers of sintered metal wire mesh.  38. The metal composite filter element according to claim 36, wherein the support and protection layer comprises one layer, two layers, three layers, or four layers or more layers of square-mesh-type sintered metal wire mesh or fine-mesh-type sintered metal wire mesh.  39. The metal composite filter element according to claim 36, wherein the pore sizes of all layers in the support and protection layer are either all greater than or all less than the pore size of the filtration precision control layer.  40. The metal composite filter element according to claim 36, wherein for conical pores, the pore sizes of all layers in the support and protection layer are all greater than the larger pore size δ1 of the filtration precision control layer; or for conical pores, the pore sizes of all layers in the support and protection layer are all less than the smaller pore size δ2 of the filtration precision control layer.  41. The metal composite filter element according to claim 36, wherein a plurality of layers in the support and protection layer habe pore sizes that are identical; or a plurality of layers in the support and protection layer has pore sizes that increase or decrease layer by layer.  42. The metal composite filter element according to claim 36, wherein the support and protection layer has a total thickness of from 0.01 mm to 1 mm, a filtration pore size of from 1 mesh to 200 mesh, and a porosity of from 1% to 60%.  43. The metal composite filter element according to any one of claims 1 to 5, wherein a bonding process between the filtration precision control layer and the support and protection layer is selected from one or more of welding, winding, weaving, and sintering.  44. Use of the metal composite filter element according to any one of claims 1 to 43 as an internal filter in a slurry bed reactor.  45. A method for filtering in a slurry bed reactor using the metal composite filter element according to any one of claims 1 to 43 as an internal filter, wherein the metal composite filter element undergoes a filtration cycle, a soaking cycle, and a backflushing cycle during operation, and wherein a part of a composite filter element assembly always has a portion in the filtration cycle, a portion in the soaking cycle, and portion in the backflushing cycle.  46. The method according to claim 45, wherein a filtration pressure difference during the filtration cycle is 1 KPa to 1,000 KPa, or 5 KPa to100 KPa; and a filtration time is 5 min to 200 min or 10 min to 100 min;soaking is performed in the slurry bed reactor, and a filter cake is scoured using a turbulent slurry, and wherein a soaking cycle time is 1 min to 20 min, or 2 min to10 min; ora time for single backflushing is 1s to 20s or 3s to10s; a pressure of a backflushing medium is 1 KPa to 1000 KPa, or 10 KPa to 500 KPa; a temperature of the backflushing medium is 100°C to 300°C or 150°C to 200°C; and the number of backflushing operations is 1 to 10, or 3 to 6.   47. The method according to claim 45, wherein a backflushing medium is a gas or liquid, and is selected from fresh reaction gas, circulating reaction gas, inert gas, and clean filtrate obtained by filtration.  48. The method according to claim 45, wherein the backflushing mode is regeneration by gas backflushing alone, regeneration by liquid backflushing alone, or a combination of gas backflushing and liquid backflushing.  49. The method according to claim 45, wherein during the backflushing cycle, a backflushing medium is backflushed into the top of a composite filter element vertically arranged, or the bottom of the composite filter element vertically arranged; or a backflushing medium is alternately backflushed into the top and the bottom of the composite filter element.     

Images