DE240493C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

~ M 240493 CLASS 55 d. GROUP

BENNO SCHILDE in HERSFELD, H.-N.

Dry air as it traverses the same through the channels.

Addendum to patent 238812 from March 4, 1910.

Patented in the German Empire on August 19, 1910. Longest duration: March 3, 1925.

While with the tunnel dryer according to patent 238812, in which the drying air to the drying material in the complete countercurrent principle and while flowing through is reheated several times through the channels, only in the upper outlet channel and at the transition to the lower inlet channel radiators are provided through which the dry air must flow through it

ίο the feature of the present invention is that that another radiator in connection with slides or sliding doors in the inlet duct for the wet material is arranged just behind the inlet opening, whereby an exit Use of the heat ■ and the greatest possible protection of the property is achieved. The dry air is due to the new arrangement of a radiator in connection with slides or Sliding doors at the beginning of the entry channel for the goods just at that point on the Bring the maximum value of their temperature at which the goods are brought into the tunnel dryer So it still has its highest degree of moisture and thus its greatest resistance to the effects who has warmth. So here comes the hottest air, only with that still completely

wet and, because of its high moisture content, most resistant to heat in touch.

In addition, the new arrangement of the radiator has immediately at the beginning of the entrance for the property still the advantage that they can also be used with devices with only one channel can use, but at the same time a proper drying with the greatest possible care des.Trockengutes and achieved with substantial savings in steam consumption. In the the proximity of the in the inlet channel shortly after the entry of the dry material into the device Sliders or sliding doors arranged in the radiator prevent the drying air in a straight line traversing the canal; rather, they force them Dry air to flow through the radiator in question. The sliding doors are like that arranged that they fulfill the aforementioned purpose on the one hand, but on the other hand also the dry material migrating through the channel or channels in the case of the relevant one Feed are not in the way.

The drawing shows two exemplary embodiments of the new tunnel dryer shown schematically, Fig. 1 a

Channel dryer with two superposed channels, Fig. 2, however, with a dryer only illustrated one channel.

In the exemplary embodiment illustrated in FIG. 1, two channels are arranged one above the other and lifts are arranged at the ends of these channels. The dry material is introduced into the lower inlet channel b at a / in order to wander through this in the direction of the arrows I; the material to be dried is then lifted by an elevator at f into the upper channel g and transported in the channel g in the direction of the elevator h until it is brought out of the dryer. The dry air, which z. B. is initiated by a fan i in a relatively cold state at the outlet end for the completely dried material, flows in the direction of arrows II and is reheated several times on its way through channel g (outlet channel) by

"it is forced by sliding doors to pass through the heating elements d, d provided in the outlet duct. After the drying air has also passed through a heating element d ' provided at the transition from one duct to the other, it continues to flow towards the material to be dried using the countercurrent principle of the invention is now b in the inlet channel for the wet dry material just behind the inlet opening yet β, a further radiator in conjunction with vanes or sliding doors arranged. the dry air is brought through this radiator e to a temperature maximum value, such that the hottest air just with the first brought in, i.e. still completely wet and therefore most resistant to heat, comes into contact with the above-mentioned advantage.

. The new device can now also be used with a single-channel or single-deck dryer, as shown in FIG. 2, with the same success. The dry material is introduced at α and passed in the direction of the arrows I through the channel b , while the dry air is introduced at c, ie at the end of the path to be traversed by the dry material with a relatively low initial temperature. Shortly after the entry of the material to be dried into the channel b , a heating element e is also arranged here in connection with slides or sliding doors, by means of which the air previously reheated by the heating element or elements d is brought to a maximum temperature, so that it is with a reaches the highest temperature on the just retracted, i.e. still completely wet goods. The already mentioned slides or sliding doors prevent the dry air from going straight through the duct. Rather, they force the dry air to pass through the ribbed radiator e . The slides or sliding doors can be raised and lowered so that they are not in the way of the goods to be dried during its advance or its migration through the channel b.

Claims (1)

Patent claim: Channel dryer with two superimposed channels and elevators provided at the ends for conveying the drying material from one channel to the other for drying cardboard, yarn, etc. in the complete countercurrent principle with repeated heating of the drying air as it passes through the channels according to patent 238812, characterized in, that in the inlet channel (b) for the wet dry material, just behind the inlet opening, there is a heating element (e) connected to slides or sliding doors. 1 sheet of drawings.