DE821391C - Process for the recovery of solvents in dry spinning - Google Patents
Process for the recovery of solvents in dry spinningInfo
- Publication number
- DE821391C DE821391C DED5663A DED0005663A DE821391C DE 821391 C DE821391 C DE 821391C DE D5663 A DED5663 A DE D5663A DE D0005663 A DED0005663 A DE D0005663A DE 821391 C DE821391 C DE 821391C
- Authority
- DE
- Germany
- Prior art keywords
- recovery
- solvents
- spinning
- dry spinning
- solvent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/04—Dry spinning methods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
Verfahren zur Wiedergewinnung von Lösungsmitteln beim Trockenspinnen Die Wiedergewinnung der Lösungsmittel ist bei den Trocl<enspinnverfahren von wesentlicher wirtschaftlicher Bedeutung. In der Tecknik erfolgt dies gewöhnlich in der Weise, daß die aus der Spinnbrause in Gien erw:irmten Spinnschacht austretenden Fäden mit Heißluft im Gegen- oder Gleichstrom getrocknet werden. Die Luft wird einer Wiedergewinnungsaitlage zugeführt, angewärmt und gelangt dann wieder in den Spinnschacht. Vorzugsweise wird dabei die kreisende Trockenluft, die zur Lösungsmittelrückgewinnung führt, so eingestellt, daß der Spinnschacht einen Unterdruck aufweist, um zu vermeiden, daß mit dem Sog, den der mit meist großer (rescliwindigkeit abgezogene Faden bildet, möglichst wenig Lösungsmitteldämpfe ausgeschleppt werden. Trotz dieser und anderer Maßnahmen gelingt es nicht, Lösungsmittelverluste ganz zu vermeiden.Process for the recovery of solvents in dry spinning The recovery of the solvents is in the dry spinning process of essential economic importance. This is usually done in technology in such a way that the shielded spinning shaft emerges from the spinning shower in Gien Threads are dried with hot air in countercurrent or cocurrent. The air becomes one Recovery system fed in, warmed up and then returned to the spinning shaft. Preferably the circulating dry air is used for solvent recovery leads, adjusted so that the spinning shaft has a negative pressure in order to avoid that with the suction created by the thread, which is usually drawn off at great speed, As little solvent vapors as possible are dragged out. Despite this and others Measures do not succeed in completely avoiding solvent losses.
Es wurde nun gefunden, daß'man auf einfache Weise das Austreten der Lösungsmittel ins Freie verhindern und sie praktisch vollkommen wiedergewinnen kann, wenn man in den Spinnschacht dort, wo schon eine äußere Verfestigung des Fadens eintritt, fein verteiltes Wasser einführt. Dies erfolgt zweckmäßig durch Anwendung von einstellbaren Düsen, damit die Tropfen die vorteilhafteste Größe erhalten. Sind sie zu klein, so werden sie mitgerissen, sind sie jedoch zu groß, so istdasAuswaschen des Lösungsmittels im Schacht aus der kreisenden Trockenluft ungenügend.It has now been found that the escape of the Prevent solvents from being released into the open and recover them practically completely, when you get into the spinning shaft where there is already an external solidification of the thread enters, introduces finely divided water. This is expediently done through application of adjustable nozzles so that the drops get the most advantageous size. Are if they are too small, they will be carried away, but if they are too big, it will wash out of Insufficient solvent in the shaft from the circulating dry air.
Nach dem Verfahren gemäß der Erfindung kann schon ein großer Teil der Lösungsmittel im Spinnschacht selbst wiedergewonnen werden, so daß die eigentliche Wiedergewinnungsanlage entlastet und daher kleiner und billiger gehalten werden kann. Das im Faden nach dem Austrften aus dem Spinnschacht noch enthaltene Lösungsmittel kann beim Naßschneiden desselben wieder aus dem angewendeten Wasser gewonnen werden.According to the method according to the invention, a large part can already be used the solvent in the spinning shaft itself can be recovered, so that the actual Recovery plant relieved and therefore kept smaller and cheaper can. The solvent still contained in the thread after it has emerged from the spinning shaft can be recovered from the water used when it is wet-cut.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED5663A DE821391C (en) | 1950-09-19 | 1950-09-19 | Process for the recovery of solvents in dry spinning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED5663A DE821391C (en) | 1950-09-19 | 1950-09-19 | Process for the recovery of solvents in dry spinning |
Publications (1)
Publication Number | Publication Date |
---|---|
DE821391C true DE821391C (en) | 1951-11-19 |
Family
ID=7031523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED5663A Expired DE821391C (en) | 1950-09-19 | 1950-09-19 | Process for the recovery of solvents in dry spinning |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE821391C (en) |
-
1950
- 1950-09-19 DE DED5663A patent/DE821391C/en not_active Expired
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