Method and device for regulating the atmospheric conditions during a spinning process

Abstract

The subject matter of the invention relates to a method and device for controlling the room air conditions in a room, in which a spinning process for the production of endless molded articles from a spinning mass containing water, cellulose and tertiary amine oxide takes place. In such a spinning process the spinning mass is extruded to form endless molded articles and is passed through an air gap, before it is immersed in a precipitating bath. Air-quenching of the endless molded articles by means of a gaseous substance stream takes place in the air gap, whereby the gaseous substance stream escapes into a spinning area surrounding the spinning process and deteriorates the room air conditions for the operating staff. Moreover, the air is heated and enriched with constituents from the spinning process, which increasingly renders the maintenance of favorable spinning conditions in the spinning area more difficult. For avoiding this, a device is provided, by means of which the room air conditions in the spinning area and in a staying area for operating staff for the maintenance and inspection of the spinning plant can be adjusted to a desired value.

1 . Method for controlling the air condition at least section-wise in a room, in which a spinning process is performed in a spinning area open with respect to the opposite room, comprising extruding endless molded articles from a spinning mass containing water, cellulose and tertiary amine oxide in the spinning area and air-quenching the extruded endless molded articles with a gaseous substance stream in an air gap prior to their immersion in a precipitating bath, and whereby the spinning plant can be inspected and maintained by operating staff staying in a staying area adjacent to the spinning area, and whereby the exhaust air from the and/or the additional air into the room is controlled by taking the gaseous substance stream into account, such that predetermined room air conditions are adjusted in the spinning area and/or the maintenance area.  
   
   
       2 . Method according to  claim 1 , wherein a predetermined content of amines and/or degradation products of tertiary amine oxide in the room air is adjusted in the spinning area and/or the staying area.  
   
   
       3 . Method according to  claim 1 , wherein a predetermined content of degradation products of the spinning process in the room air is adjusted in the spinning area and/or staying area.  
   
   
       4 . Method according to  claim 1 , wherein a predetermined humidity of the room air is adjusted in the spinning area and/or staying area.  
   
   
       5 . Method according to  claim 1 , wherein a predetermined temperature of the room air is adjusted in the spinning area and/or staying area.  
   
   
       6 . Method according to  claim 1 , wherein the room air conditions are adjusted by controlling the volume flow rate of the exhaust air.  
   
   
       7 . Method according to  claim 1 , wherein the room air conditions are adjusted by controlling the volume flow rate of the additional air.  
   
   
       8 . Method according to  claim 1 , wherein the exhaust air is at least partially sucked out directly from the spinning area.  
   
   
       9 . Method according to  claim 1 , wherein the exhaust air is at least partially sucked out directly from the staying area.  
   
   
       10 . Method according to  claim 1 , wherein the exhaust air is at least partially sucked out from a portion of the room close to the ceiling.  
   
   
       11 . Method according to  claim 1 , wherein between 10 and 80 m 3 , exhaust air primarily containing process air per kg produced quantity of endless molded articles are sucked off in the spinning area and/or the proximity of the spinning area.  
   
   
       12 . Method according to  claim 1 , wherein between 3 and 50 m 3  gaseous substance per kg produced endless molded articles are blown into the air gap by means of the air-quenching device.  
   
   
       13 . Method according to  claim 1 , wherein between 1.2 and 2.5 times the exhaust air is sucked out of the room in comparison to what is supplied to the room by the gaseous substance.  
   
   
       14 . Method according to  claim 1 , wherein 3 to 10 times the volume of the room is exchanged per hour.  
   
   
       15 . Method according to  claim 1 , wherein the exhaust air is supplied to a purification stage with a washing system, in which the portion of the exhaust air portions deriving from the spinning process are reduced.  
   
   
       16 . Method according to  claim 1 , wherein a substantially biological purification by means of a microbial degradation of reaction products of the spinning process takes place in the purification stage.  
   
   
       17 . Method according to  claim 15 , wherein the exhaust air is supplied to a demister.  
   
   
       18 . Method according to  claim 15 , wherein the exhaust air is supplied to an aerosol separator.  
   
   
       19 . Method according to  claim 1 , wherein the exhaust air is supplied to an electrostatic filter with a washing stage connected upstream or downstream thereof.  
   
   
       20 . Method according to  claim 1 , wherein at least a part of the additional air is supplied in the direct proximity of the spinning area.  
   
   
       21 . Method according to  claim 1 , wherein at least a part of the additional air is supplied in the staying area.  
   
   
       22 . Device for controlling the room air conditions in a room having a spinning area associated with a spinning plant, wherein the spinning area comprises an air gap open with respect to the room and limited by a precipitating bath, through which endless molded articles extruded from a spinning mass containing water, cellulose and tertiary amine oxide are passed and in which an air-quenching device is arranged, by which the endless molded articles are air-quenched with a gaseous substance stream, and having a staying area for the maintenance and inspection of the spinning plant by operating staff, wherein the device comprises an exhaust air device, an additional air device, and a controller, said controller being adapted to adjust predetermined room air conditions in the spinning area and/or the staying area.  
   
   
       23 . Device according to  claim 22 , wherein a room air sensor is arranged in the spinning area, by which a signal representative of the contamination of the room air by the spinning process can be outputted.  
   
   
       24 . Device according to  claim 22 , wherein a room air sensor is arranged in the maintenance area, by which a signal representative of the contamination of the room air by the spinning process can be outputted.  
   
   
       25 . Retrofit kit for a spinning plant for the production of endless molded articles from a spinning mass containing cellulose, water and tertiary amine oxide, wherein the spinning plant comprises an extrusion head with extrusion openings, an air gap with an air-quenching device and a precipitating bath, and wherein the retrofit kit according to  claim 22  is designed to be retrofittingly installable in an existing spinning plant.  
   
   
       26 . Spinning plant comprising a spinning plant for the production of endless molded articles from a spinning mass containing cellulose, water and tertiary amine oxide, wherein the spinning plant comprises an extrusion head with extrusion openings, an air gap with an air-quenching device and a precipitating bath, as well as a device according to  claim 22 .  
   
   
       27 . The method according to  claim 11 , wherein between 10 and 30 m 3  exhaust air is sucked off.  
   
   
       28 . Retrofit kit for a spinning plant for the production of endless molded articles from a spinning mass containing cellulose, water and tertiary amine oxide, wherein the spinning plant comprises an extrusion head with extrusion openings, an air gap with an air-quenching device and a precipitating bath, and wherein the retrofit kit according to  claim 23  is designed to be retrofittingly installable in an existing spinning plant.  
   
   
       29 . Retrofit kit for a spinning plant for the production of endless molded articles from a spinning mass containing cellulose, water and tertiary amine oxide, wherein the spinning plant comprises an extrusion head with extrusion openings, an air gap with an air-quenching device and a precipitating bath, and wherein the retrofit kit according to  claim 24  is designed to be retrofittingly installable in an existing spinning plant.  
   
   
       30 . Spinning plant comprising a spinning plant for the production of endless molded articles from a spinning mass containing cellulose, water and tertiary amine oxide, wherein the spinning plant comprises an extrusion head with extrusion openings, an air gap with an air-quenching device and a precipitating bath, as well as a device according to  claim 23 .  
   
   
       31 . Spinning plant comprising a spinning plant for the production of endless molded articles from a spinning mass containing cellulose, water and tertiary amine oxide, wherein the spinning plant comprises an extrusion head with extrusion openings, an air gap with an air-quenching device and a precipitating bath, as well as a device according to  claim 24.