Patent EA-003975-B1 (EA)
Title: Fluid guidance piece with internal temperature equalisation
Inventor: ZIKELI STEFAN
IPC: F17D1/18
Filed: 2001-04-17
Abstract: 1. A fluid line member for passing therethrough a crystallizing, heat-sensitive working fluid, such as a synthetic polymer or a polymer solution, a cellulose derivative, a solution consisting of cellulose, water and amine oxide, as well as mixtures thereof, comprising a working fluid line portion flown through by the working fluid, characterized in that said working fluid line portion (2) has a substantially annular flow cross-section, and that an internal temperature control device (5) is arranged in the center (M) of said fluid line member (1) replacing the core flow of the working fluid for controlling the temperature of the working fluid within said working fluid line portion (2). 2. The fluid line member according to claim 1, characterized in that said internal temperature control device (5) is designed as a preferably tubular temperature-control fluid line (8) through which a temperature control fluid is flowing. 3. The fluid line member according to any one of the aforementioned claims, characterized in that the temperature of the temperature control device (5) is higher than the temperature of the working fluid. 4. The fluid line member according to any one of claims 1 to 2, characterized in that the temperature of the temperature control device (5) is lower than the temperature of the working fluid. 5. The fluid line member according to any one of the aforementioned claims, characterized in that the direction of flow of the temperature control fluid within said temperature control device (5) is substantially identical with the direction of flow of the working fluid through said working fluid line portion (2). 6. The fluid line member according to any one of claims 1 to 4, characterized in that the direction of flow of the temperature control fluid within said temperature control device (5) is substantially opposite to the direction of flow of the working fluid through said working fluid line portion (2). 7. The fluid line member according to any one of the aforementioned claims, characterized in that said fluid line member (1) comprises a temperature control jacket section (9) for controlling the temperature of the working fluid, said temperature-control jacket section (9) surrounding said working fluid line portion (2) at least sectionwise. 8. The fluid line member according to claim 7, characterized in that a temperature control fluid flows through said working fluid line portion (2). 9. The fluid line member according to claim 7, characterized in that the temperature of the temperature control fluid in said temperature-control jacket section (9) is higher than the temperature of said temperature control device (5). 10. The fluid line member according to claim 7, characterized in that the temperature of the temperature control fluid in said temperature-control jacket section (9) is lower than the temperature of said temperature control device (5). 11. The fluid line member according to any one of claims 7 to 10, characterized in that the direction of flow of the temperature control fluid in said temperature-control jacket section (9) is identical with the direction of flow of the working fluid in said working fluid line portion (2). 12. The fluid line member according to any one of claims 7 to 10, characterized in that the direction of flow of the temperature control fluid in the outer temperature-control jacket section (9) is opposite to the direction of flow of the working fluid in said working fluid line portion (2). 13. The fluid line member according to any one of the aforementioned claims, characterized in that said working fluid line portion (2) is covered at least sectionwise by a thermal insulation layer. 14. The fluid line member according to any one of the aforementioned claims, characterized in that at least one spacer (10) extends from said temperature control device (5) to the outer wall (3) of said working fluid line portion (2) into said working fluid. 15. The fluid line member according to claim 14, characterized in that said spacer (10) has a substantially streamlined cross-section. 16. The fluid line member according to claim 14 or 15, characterized in that the temperature control fluid in said temperature control device (5) flows through said spacer (10). 17. The fluid line member according to any one of claims 14 to 16, characterized in that said spacer (10) is arranged on an end of said fluid line member (1) that is positioned in the direction of passage of the working fluid. 18. The fluid line member according to any one of claims 14 to 17, characterized in that said spacer (10) is provided on a separate feed module (6) mounted on said temperature control device (5). 19. The fluid line member according to any one of the aforementioned claims, characterized in that a connecting section (12) is provided with at least one temperature-control fluid opening (11) through which temperature control fluid can be supplied from the outside of said fluid line member (1) to said temperature control device (5). 20. The fluid line member according to any one of the aforementioned claims, characterized in that at least one end positioned in the direction of passage of the working fluid said temperature control device (5) comprises a passage opening (14') for the temperature control fluid in said temperature control device (5), said passage opening (14') being tightly connectable to a corresponding passage opening (14') of a further fluid line member (1). 21. The fluid line member according to any one of the aforementioned claims, characterized in that a closing means (15) is provided which is mountable on said passage opening (14') for the temperature control fluid of said temperature control device (5) and by which said passage opening (14') can be tightly closed. 22. The fluid line member according to claim 21, characterized in that said closing means (15) has a substantially streamlined outer shape. 23. The fluid line member according to any one of the aforementioned claims, characterized in that at least one end positioned in the direction of passage of the working fluid said fluid line member (1) comprises a connecting section (12) for connecting said fluid line member (1) to a further fluid line member (1). 24. The fluid line member according to any one of the aforementioned claims, characterized in that a surface ratio O=(DI+DA)/DAD from the sum of outer diameter DA and inner diameter DI of the annular working-fluid line portion (2) and an adequate fluid line diameter DAD=SQRT(DA<2>-DI<2>) is between O=1 to O=4, particularly preferably between O=1 to O=1.8. 25. The fluid line member according to any one of the aforementioned claims, characterized in that a working-fluid layer thickness ratio A=S/DAD resulting from the ratio of the layer thickness S=(DA-DI)/2 to the adequate fluid line diameter DAD of said working fluid line portion (2) is preferably less than 0.5, particularly preferably less than 0.4. 26. The fluid line member according to any one of the aforementioned claims, characterized in that said fluid line member (1) is designed as a straight pipe member or as a pipe member of any desired curvature which at each end positioned in the direction of flow of the working fluid comprises a respective connecting section (12) for connecting two further fluid line members (1). 27. The fluid line member according to any one of claims 1 to 26, characterized in that said fluid line member (1) is designed as a distributor member comprising at least three connecting sections for connecting further fluid line members (1). 28. The fluid line member according to any one of claims 1 to 26, characterized in that said fluid line member (1) is designed as an end member with only one connecting section (12) for connecting only one further fluid line member (1). 29. The fluid line member according to any one of the aforementioned claims, characterized in that said fluid line member (1) comprises an installed pump for conveying the working fluid. 30. The fluid line member according to any one of the aforementioned claims, characterized in that said fluid line member (1) comprises an installed mixing reactor for treating the working fluid and for varying the characteristics of the polymer. 31. The fluid line member according to any one of the aforementioned claims, characterized in that said fluid line member (1) comprises one or several fluid filtering groups for filtering the working fluid. 32. The fluid line member according to any one of the aforementioned claims, characterized in that said temperature control fluid is a liquid. 33. The fluid line member according to any one of claims 1 to 32, characterized in that said temperature control fluid is gaseous. 34. The fluid line member according to any one of the aforementioned claims, characterized in that said fluid line member (1) in said working fluid line portion (2) is made from steel, high-quality steel or chromium-plated steel. 35. The fluid line member according to any one of the aforementioned claims, characterized in that said temperature control device (5) is made from steel or high-quality steel or chromium-plated steel or high-quality steel. 36. A modular fluid line system for passing therethrough a crystallizing, heat-sensitive working fluid, such as a synthetic polymer or a polymer solution, a cellulose derivative, a solution of cellulose, water and amine oxide, as well as mixtures thereof, characterized in that said fluid line system comprises at least two series-connectable fluid line members (1) according to any one of the aforementioned claims. 37. The modular fluid line system for passing therethrough a crystallizing, heat-sensitive working fluid consisting of a spinning solution containing cellulose, water and a tertiary amine oxide, such as N-methylmorpholine N-oxide (NMMO) as well as stabilizers for the thermal stabilization of said cellulose and the solvent, and, optionally, further additives such as titanium dioxide, barium