Process and apparatus for reducing the amount of liquid from a porous material by means of superheated steam from said liquid
AssigneeInstitut Textile de France
InventorsJean Thomas, Jacques Laneres, Jean P. Leonard
Life of this patent
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Abstract
Process and apparatus for reducing the liquid content of a porous material by means of superheated vapor from said liquid. The apparatus comprises, in order: a vapor generator 1; a circulation fan 2; a vapor superheater 6; a closed, sealed chamber 7, and an assembley 22-26 to provide in the chamber 7 a passage for fluid and for supporting textile material 9 such that it is interposed in the path of the vapor; a vapor condenser 13; a valve for regulation of pressure 16; a conduit for recycling vapor 17, and a device 32, 32a to measure the temperature prevailing in the fluid passage upstream of the porous material.
Claims10
Process for reducing the liquid content of a porous material 9 impregnated with this liquid to a predetermined liquid content (h) which is greater than zero, said process comprising placing this material in a closed, sealed chamber 7 constituting a path for travel of fluid in a body, such that this material is interposed in said path of travel over the totality of a transverse section of the latter, feeding an inlet of said fluid path with superheated vapor of the said liquid while establishing in the fluid path respectively upstream and downstream of the material to be treated a difference of pressure (P.sub.1 -P.sub.2) in the direction going from upstream to downstream, in order that the impregnation liquid is evaporated upon contact with said superheated vapor and is carried in the vapor state by the vapor flow, measuring the vapor temperature (T.sub.2) downstream of the material 9 and halting the feed of superheated vapor to the inlet of the fluid path when said temperature reaches a predetermined value corresponding to the said predetermined liquid content of the material.
Apparatus for diminishing the liquid content of a porous material 9 impregnated with this liquid to a predetermined liquid content (h) which is greater than zero comprising the following:
- a vapor generator 1, a vapor superheater 6, a closed, sealed chamber 7 having an inlet 7a connected to the superheater 6, an outlet 7b, and means 22 to 26,28,29 to provide in the chamber 7 a fluid passage between the said inlet 7a and the said outlet 7b and to hold the porous material 9 in the chamber 7 such that this material is interposed in the path of the vapor in the said passage over the totality of a transverse section of the latter, a vapor condenser 13 connected to the outlet 7b of the chamber, a fan 2 to establish a difference of pressure in the said fluid passage on both sides of the porous material 9, a recycle conduit 17 for vapor connecting the outlet 7b of the chamber to the inlet of the fan 2, means 32, 32a for measuring the temperature in the said fluid passage downstream of the porous material 9 in the direction of travel of the vapor, said temperature being indicative of the liquid content of the porous material and enabling halting of the drying of the material when the temperature indicates that the material is at the desired predetermined liquid content (h), and pressure regulation valve means 16 interposed between the condenser 13 and the outlet 7b of the chamber for maintaining the pressure at the said outlet of the chamber constant.
Dependencies are inferred from the claim text.