TH13481B - Filtration system - Google Patents

Abstract

Filtration system for dope filtration of solvent-fed fiber mills. Where the dope to be spun from the supply (10) through the filter assembly sequence (15), (21), (23) to the nozzle (22 (b)) of the spout (22) each system head. Filtration consists in order of flow. The first filter assembly (15) with the smallest hole size (usually 20 m) filter element in the filter assembly and the final filter assembly (23) at the source, the injection tube (22 ( b)) of each spindle (22) head, a final filter assembly with a hole at the largest hole size (usually 80 mu) in the filter set and equal or Smaller than the size of the injection tube (usually 80 mu), the filter medium of the filter set between the middle (21) between the first (15) and the final (23) stages increases as the set progresses. Assemble the first filter assembly (15) to the last filter assembly (23) along the flow path:

Claims (9)

1. In the fiber manufacturing process, a solution is spun in which the dope to be spun onto the fibers produces The flow from the supply to the spindle, which has a number of spinnerate nozzles with a predetermined diameter, a filtration system for filtering the said dope between the said supply and the spout. Include a series of at least two filtered assemblies with Different hole sizes The hole size of the assembly in the series closest to the source will be The smallest of the series and the hole size of the assembly closest to the flapper head is the largest. Equal to the diameter of the nozzle of the said duct 2. Filtration system according to claim 1, where at least three filter assemblies are required. Between the doping supply and the spinning head 3. Filtration system according to claim No. 1, where the filter assembly closest to the source Include at least two filters connected in parallel in the flow path from the source. Dope pay to head head Selectable operated bypass valve in order to connect at least the One such filter in the flow path and that is cut off at least one such filter from Flow path and path for adjusting the flow rate of the dope through the filter of the kit. Assemble the strainer closest to the supply so that it maintains a constant dope flow from the kit. Attach the filter when the selected filter of the said filter assembly is connected to or is Cut off from the flow path 4. Filtration system according to claim No. 1, where the filter assembly closest to the source It consists of the first and second filters that are connected in parallel between the dope supply to be filtered. And the exit for by that has been filtered One bypass valve is at the first and second filter inlet. It works selectively in mode one to divert the dope to be filtered to the selected filter. One and in the second mode to divert dopes that are both filtered to such filters. Variable pump path The speed change is at the source of the said filter. The second bypass valve is at the outlet of the strainer. Such one and a second and will work selectively to get the filtered dope flow from the filter. If one or both of them are selected, and to send the filtered dope to the outlet for the secondary dope, the destination sensing path of such filter for monitoring the flow of the filtered dope. already And works to produce the filtered dope flow indication through the aforementioned first and second filters. And the path that responds to the signal generated by the sensing path, which works to control the speed Of the pump path to maintain a pre-filtered dope flow through the filter assembly. Such as nearest to the source. 5. Filtration system according to claim No. 1, where the filter assembly closest to the source It is assembled with a number of pipes with a metal strand filter medium installed in a sealed container. 6. Filtration system according to claim 1, where the filter medium of the near filter assembly Most supply has a hole size, which filters out particles ranging in size from 20 mu to 30 mu. 7. Filtration system according to claim 1, where the filter medium of the filter assembly near the head The most spin has a hole size which filters out particles between 30 mu and 40 mu. 8. Filtration system according to claim 1 and includes at least the assembly that One intermediate filter with a pore-sized filter medium that filters out particles from 30 mu to 40 mu. 9. Filtration system according to claim 1, where the nozzle hole diameter of the nozzle ranges from 70 mu to 80 mu and where the filtering system consists of at least three filter assemblies. The first filter assembly has a pore size which filters out particles between 20 mu and 30 mu. The second filter assembly, the working end of the first filter assembly, has a pore size. Will filter out Particles between 30 mu 40 mu and the third end of the filter assembly. Attach a second filter with a pore size that filters out particles less than 80 mu 1. 0. Filtration system according to claim 1, where the filter assembly closest to the supply. Assembling most of the mass filter and the rest of the assembly assembly.The filter assembly is Filter along the line between the majority of the mass filter and the spout.