SE451540B - SET AND DEVICE TO HEAT TREATMENT OF A LIQUID MEDIUM CONTAINED IN A CONTAINER - Google Patents

Description

POUR 4 5 'l 51 ,: 0 the upper trough 12 through nozzles 32. Openings 34 in the bottom of the trough 12 release a part of the water but also ensures that the water in the trough rises to the overflow drain 20 level 36, which overflow drains the rest of the water that is supplied through the nozzles 32.

As a complement or as an alternative to the heat exchanger 30 it can be introduced water vapor through a valve 34 in the vessel 10 to heat the circulating water. The purpose of the overflow drain 20 is to keep such a level 36 out of the bottle cap. 22 that the hydrostatic pressures on either side of the bottle wall 38 are substantial equalizes each other and substantially counteracts the deformation caused by the liquid in the bottle would have produced on the bottle wall, if no liquid level on the outside of the bottle had found.

In tests with cylindrical polyethylene bottles containing so-called infusion solution, i.e. a solution of drug in water, which solution has substantially the same density as water, it has been found that the bottles substantially retain their cylindrical shape and its dimensions during a heat treatment to 110 OC. The level 36 of the water was maintained equal to level 26 of the infusion solution. Gutters 40 were arranged in the ground plane 24 for to introduce water under the cupped bottom 42 of the bottle. The cupped bottom 42 was also retained its shape during the heat treatment.

The lower trough 14 is the same and functions in the same way as the upper one the trough 12. The trough 14 is supplied with heat-treating liquid from the upper trough 12.

If the liquid in the bottles has substantially the same density as the heat-treated the smallest deformation of the bottles is obtained if the level 36 is maintained substantially equal to level 26. If the liquid in the bottles has a greater density than that the heat treatment liquid is kept level 36 suitably higher than level 26 and if the liquid in the bottles have a smaller density than the heat treating liquid is kept at level 36 preferably lower than level 26 so that the deformation of the bottles will be as small as possible.

After the heat treatment, the bottles are cooled, preferably by cooling water the heat exchanger 30, is circulated through the vessel 1D via the nozzles 32.

Instead of letting the end 2D of the tube 21 form overflow, you can let the upper edge 44 of the trough 12, 14 constitute overflow drain.

In the de146 of the bottle, which is located above level 26, is a gaseous medium entrapped, which strives to expand and thereby deform the bottle, when the temperature is rising. This expansion and deformation is counteracted by compressed air, which is let into the vessel 10 through a valve 48, so that the pressure in the vessel 10 is kept equal the pressure in the part 46. Through another valve 50 air and water vapor can be released out the vessel 10, so that the pressure in the vessel 10 does not become greater than the pressure in the part 46, in which case the bottle would be compressed. "ff u ”

Claims (5)

* AQPMÖIJT QUALH-y ß 451 540 P a t e n t k r a v A method of heating and then cooling a first liquid medium enclosed in a container (22) to a certain level (26), above which a gaseous medium is enclosed in the container, by means of a second liquid medium, which is introduced into contact with the outside of the container and which reaches temperatures at which the material in the wall (38) of the container softens and tends to be permanently deformed by the gas pressure and the hydrostatic pressure of the media in the container, characterized in that, at least when the material in the container (22 wall has said temperatures, keeps the gas pressure outside the container equal to the gas pressure in the container and allows the second medium to enclose the container to such a level (36) that the hydrostatic pressures on either side of the container wall (38) equalize, whereby said deformation hindered. Apparatus for carrying out the method according to claim 1 for heating and then cooling a first liquid medium enclosed in a container (22) to a certain level (26), above which a gaseous medium is enclosed in the container, by means of a second liquid medium, which is brought into contact with the outside of the container, and comprising a bottom (16), on which one or more such containers (22) are intended to be placed, characterized by means (48,5Û) for keeping the gas pressure outside the container equal to the gas pressure in the container and in that the bottom forms the bottom (16) of a hopper (12,14), which is arranged to hold the second medium around the container to such a level (36) that the hydrostatic pressures on either side of the container wall (38) equalizes. Device according to claim 2, characterized by a first means (32) for supplying the second medium to the trough (12, 14), openings (34) in the bottom (16) for releasing a part of the second medium from the trough and an overflow drain (20), located at said level (36), for discharging the rest of the second medium from the trough. 4. Device according to claim 3, characterized in that the bottom (16) is provided with a groove (40) for letting the second medium under the container. Device according to one of Claims 2 to 4, characterized in that a plurality of troughs (12, 14) are arranged one above the other, the medium flowing away from a trough (12) being arranged to be supplied to that trough (14). ), which is below.