DE394942C - Electrically heated drying cabinet for flammable substances, surrounded by a liquid bath - Google Patents

Description

Drying cabinets, which are used for drying flammable substances, ζ. Β. Gunpowder ο. Like., are used, a certain maximum temperature, z. B. from Do not exceed ioo ° C and must depend on the nature of the material to be dried Good things can still be regulated in their temperature in several stages. The controllability the temperature can be determined in the simplest way

ίο with electric heating cartridges, whose resistance wires are arranged in different layers and can be switched in a known manner. To pause According to the present innovation, the maximum temperature will be the container holding the substances to be dried within a Liquid bath, e.g. B. a water bath arranged, which in turn by the electrical Heizpätronen is heated. The drying container is thus heated indirectly through the water bath and therefore completely even. Still can Overheating occurs if · precautions are not taken to avoid the excess very specific maximum temperatures - prevent completely automatically. For this purpose, the water tank is at the top through a pipe socket with a cooling coil which cools the superheated liquid or the vapor developed

condenses and the cooled water returns to the bath below. To continue It is important to keep the liquid level constant in the water bath Connected to the water bath by a pipe, a compensating tank is provided, its liquid level with that of the water bath always remains at the same level, and which one operated by a float ίο owns inflow organ.

The drawing shows an embodiment of the innovation in Fig. Ι in longitudinal section. - Fig. 2 is a section along line AB and FIG. 3 is a section along line CD in FIG. I.

The drying cabinet consists of the actual container α, which is intended to hold the flammable substances to be dried, such as gunpowder or the like. The Beflo holder α has a lockable air flap b and, if necessary, a thermometer c (Fig. 2) in the front and rear wall to renew the air. The container α is enclosed by a water bath d , which in turn is heated by electrical heating cartridges e. The heating cartridges e are advantageously inserted from the rear wall of the drying cabinet and sealed by glands f. The water bath ' d has a pipe socket g in its upper cover which is connected to a pipe formed into a cooling coil α. If a greater temperature increase or steam formation occurs in the water bath d , the steam is condensed in the cooling coil h , and the condensation water is

Fig.i.

Ren parts of the water bath opening pipe i fed back to the latter. Through the pipe i , the water bath d is also connected to an open equalizing tank k , the water level of which is at the same level as that of the water bath. That. The water equalization vessel k is provided with a water supply m actuated by a float I. In this way, water losses are avoided, ie the drying cabinet is always completely surrounded by water and does not accept excessively high temperatures because the water filling is in direct contact with the outside atmosphere, so higher pressures cannot arise.

All of these features taken together protect the drying cabinet completely independently before exceeding a certain temperature and make it whole Particularly suitable for drying flammable substances such as gunpowder and the like.

Claims (1)

P ATENT claim: Electrically heated drying cabinet surrounded by a liquid bath for flammable substances, characterized in that the surface of the bath with a pipe running out to a cooling coil is in communication, which in turn returns the condensed vapors as a liquid to the bath and with it the outside atmosphere through an open water level regulator, for the purpose of higher pressures and thus also to avoid dangerous temperature increases.