Patent EA-003883-B1 (EA)
Title: Burst protection device
Inventor: ZIKELI STEFAN
IPC: F16K17/16
Filed: 2001-04-19
Abstract: 1. A burst protection device (1) for a fluid line member (8, 8') for passing therethrough a spontaneously exothermally reacting working fluid, such as a synthetic polymer or a polymer solution, a cellulose derivative or a solution consisting of cellulose, water and amine oxide, as well as mixtures thereof, said fluid fine member (8, 8') comprising a working fluid line portion (9) flown through by the working fluid, and said burst protection device (1) comprising a pressure compensating volume (7) which when a predetermined burst pressure is exceeded in the working fluid can be transferred from a normal operative state in which the pressure compensating volume (7) is separated from the working fluid line portion (9), into a burst state in which the pressure compensating volume (7) is connected to the working fluid line portion (9), the burst protection device (1) comprising at least one fastening body (6) by which the pressure compensating volume (7) is kept at least section wise within the working fluid line portion (9) and in a state where it is circumflown by the working fluid at least sectionwise, and the pressure compensating volume (7) being connected to the outside (15) of the fluid line member (8, 8'), characterized in that the fastening body (6) is designed to be mountable between two fluid line members (8, 8'). 2. The burst protection device according to claim 1, characterized in that there is provided at least one pressure relief line (14) leading from said pressure compensating volume (7) to the outside of said fluid line member. 3. The burst protection device according to claim 1 or 2, characterized in that said pressure compensating volume (7) is formed by a substantially tubular inner body (4). 4. The burst protection device according to any one of the aforementioned claims, characterized in that at least one spacer (12) is provided which projects into the working fluid and by which said pressure compensating volume (7) is kept spaced-apart from an outer wall (10) of said working fluid line portion (10). 5. The burst protection device according to claim 4, characterized in that said pressure relief line (14) is arranged in a spacer (12). 6. The burst protection device according to claim 4 or 5, characterized in that said spacer (12) has a substantially streamlined cross-section. 7. The burst protection device according to any one of claims 4 to 6, characterized in that said spacer (10) is formed on said fastening body (6). 8. The burst protection device according to claim 7, characterized in that said fastening body (6) comprises a plurality of spacers (12) which are distributed in circumferential direction and preferably designed in the manner of spokes. 9. The burst protection device according to any one of the aforementioned claims, characterized in that said fastening body (6) has a tubular section to which the inner body (4) of a temperature control device (50) or a burst protection device (1) can be fastened. 10. The burst protection device according to any one of the aforementioned claims, characterized in that said pressure compensating volume (7) is arranged in the center of said working fluid line portion (9) replacing the core flow of the working fluid. 11. The burst protection device according to any one of the aforementioned claims, characterized in that said burst protection device (1) comprises at least one bursting body (2) having at least one predetermined breaking section (3) which is exposed to the pressure prevailing in said working fluid line portion (2) and is adjoined by said pressure compensating volume (7), said predetermined breaking section (3) being designed as a weakened place the mechanical strength of which is reduced in comparison with the surroundings thereof. 12. The burst protection device according to claim 11, characterized in that said burst body (2) has a substantially streamlined outer shape. 13. The burst protection device according to claim 11 or 12, characterized in that said bursting body (2) is detachably arranged on said burst protection device (1). 14. The burst protection device according to any one of claims 11 to 13, characterized in that said predetermined breaking section is designed as a bursting disc (3) by which a preferably axial end surface of said inner body (4) is closed in the normal operative state. 15. The burst protection device according to any one of the aforementioned claims, characterized in that said burst protection device is simultaneously designed as an internal temperature control device (50) the temperature of which is controllable at least sectionwise in the area flown around by the working fluid for controlling the temperature of the working fluid. 16. The burst protection device according to claim 15, characterized in that a temperature control fluid whose temperature is adjustable by a control device is received by said pressure compensating volume (7). 17. The burst protection device according to claim 14 or 15, characterized in that said pressure relief line (14) serves as a feed line for the supply of the temperature control fluid. 18. The burst protection device according to claim 17, characterized in that said pressure compensating volume (7) is connected to two feed lines (14) spaced apart in the direction of flow (P) of the working fluid. 19. The burst protection device according to any one of the aforementioned claims, characterized in that said fluid line member (1) comprises a jacket temperature control device for controlling the temperature of the working fluid, said jacket temperature control device surrounding said working fluid line portion (9) at least sectionwise, and the temperature of said jacket temperature control device being controllable by a control device. 20. The burst protection device according to claim 19, characterized in that said jacket temperature control device (9) comprises a cavity (21) through which a temperature control fluid is flowing, the temperature of said temperature control fluid differing from the temperature of the working fluid. 21. A fluid line member for passing therethrough a spontaneously exothermally reacting working fluid, such as a synthetic polymer, a cellulose derivative or a solution consisting of cellulose, water and amine oxide, comprising a working fluid line portion through which the working fluid is flowing, characterized in that said fluid line member (8) is provided with a burst protection device (1) according to any one of the aforementioned claims. 22. The fluid line member according to claim 21, characterized in that said fluid line member is provided with an internal temperature control device (50). 23. A modular fluid line system consisting of at least two fluid line members (8, 8') for passing therethrough a spontaneously exothermally reacting working fluid, such as a synthetic polymer, a cellulose derivative or a solution consisting of cellulose, water and amine oxide, comprising a working fluid line portion (9) which has the working fluid flowing therethrough, characterized in that a burst protection device (1) according to any one of the above-mentioned claims is mounted between the connection sections (18, 18') of two fluid line members (8, 8'; 8', 8") that are arranged one after the other. 24. The modular fluid line system according to claim 23, characterized in that said burst protection device (1) is mounted between the connecting sections (18, 18') of two successively arranged fluid line members (8, 8'; 8', 8"). 25. The modular fluid line system according to claim 23 or 24, characterized in that a fluid line member (8) with a burst protection device (1) alternates with a fluid line member with an internal temperature contra! device (50). 26. A facility far passing therethrough and processing a spontaneously exothermally reacting working fluid into molded bodies from a synthetic polymer, a cellulose derivative or a solution consisting of cellulose, water and amine oxide, as well as mixtures thereof, comprising a fluid line system of a modular structure with fluid line members, including a temperature control device or installed apparatus and fittings such as pumps, filters, heat exchangers, mixing reactors, ball valves, etc., and with burst protection devices arranged at regular intervals, characterized in that there is provided at least one burst protection device designed according to any one of claims 1 to 20. 27. The facility according to claim 26, characterized in that the specific burst protection device arrangement ratio V is less than 3000. 28. The facility according to claim 27, characterized in that the specific burst protection device arrangement ratio V is less than 2000. 29. The facility according to claim 28, characterized in that the specific burst protection device arrangement ratio V is less than 1500. 30. The facility according to any one of claims 1 to 29, characterized in that the specific pressure compensating volume is less than 500 liter. 31. The facility according to claim 30, characterized in that the specific pressure compensating volume is less than 300 liter. 32. The facility according to claim 31, characterized in that the specific pressure compensating volume is less than 150 liter. 33. The facility according to any one of claims 26 to 32, characterized in that the working fluid as a crystallizing, heat-sensitive working fluid may be composed of a spinning solution containing cellulose, water and a tertiary amine oxide, such as N-methylmorpholine N-oxide (NMMO), of stabilizers for the thermal stabilization of the cellulose and the solvent, and, optionally, of further additives such as titanium dioxide, barium sulfate, graphite, carboxymethyl celluloses, polyethylene glycols, chitin, chitosan, alginic acid, polysaccharides, dyes, antibacterially acting chemicals, flameproofing agents containing phosphorus, halogens or nitrogen, activated carbon, carbon blacks or electrically conductive carbon blacks, silicic acid, o