DE2058031A1 - Filter support belt for a continuously operating filter press - Google Patents

Description

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Addition to the main patent no. .... ... Fatentgesuch Nr.P.19.55.§2 3 · 5 from .2

Hans Gu.) He , · Rümlang

(Switzerland)

Filter support belt for a continuously operating filter press

The subject of the main patent is a filter support belt for a continuously operating filter press, which articulated links containing drainage devices which is characterized in that it has drainage grooves running in the conveying direction as drainage devices, which, viewed in the conveying direction, are closed at the rear and open at the front and towards the rear of the link, wherein the front ends of the webs separating the drainage grooves are inclined forwards and away from the filter surface and with a correspondingly inclined rear bar of the preceding link running transversely to the conveying device., in such a way that the front ends of the webs are at least approximately in contact with the bar when the filter support bench is extended and when the filter belt is curved, it moves away from the filter surface form tapered crevices away.

It has been found that the derivative of the filtered out Liquid on the back of the filter support belt in some Cases is not yet entirely satisfactory. Especially when there is a lot of fluid, it can happen that the fluid flows back at the connection points of the links and soaks the pressed material again.

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Purpose of the present. Invention is to improve the subject matter of the main patent so that a flawless Discharge of the filtered liquid is guaranteed.

The filter support belt according to the invention for a continuously operating filter press, which has articulated links containing drainage devices, each link having drainage grooves as drainage devices running in the direction of belt travel, which, viewed in the conveying direction, are closed at the rear and in the front area towards the front and towards the rear of the link are open, furthermore the front ends of the webs separating the drainage grooves are inclined away from the filter surface and forward and cooperate with a correspondingly inclined rear bar of the front member running transversely to the conveying direction, the front ends of the webs when stretched The filter support band is at least approximately up against the bar and until the curved filter support band tapering gaps form away from the filter surface, is characterized in that drainage channels are provided on the rear side of the part of each link having the drainage grooves hen that widen towards the rear end and into which the drainage surface of the rear bar opens and which taper at the front end and have guide lugs that protrude into the enlarged parts of the drainage channels of the front link.

The drainage channels on the back of the links ensure safe guidance of the liquid. In particular, the guide lugs opening into the widened part of the guide channels of the respective front link ensure that the liquid is guided in the area of the gap between two links in such a way that the liquid that has already been squeezed out does not enter the. Can flow back gap. This means that the filter

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Liquid drawn off surfaces is also safely discharged.

An embodiment of the filter support belt according to the invention is described in more detail below with reference to the drawing, showing:

Fig. 1 shows a member of the filter support belt in plan view and in part sectional partial view;

FIG. 2 shows the link according to FIG. 1 in longitudinal section II-II;

Fig. 3 Oil © connection of two links with an extended filter support belt, in longitudinal section;

Fig. 4 shows the connection of the links according to Fig. J5 but with a curved Filter support belt.

In FIGS. 1 and 2, a link of a filter support belt is shown, which has drainage grooves 1, which are separated by crosspieces 2. The rear ends 5 of the drainage grooves, seen in the direction of travel of the belt, are closed off by a strip 5 inclined away from the filter surface h and forwardly. The front ends 6 of the drainage grooves are open to the front and to the rear of the limb. The front ends 7 of the webs 2 are also inclined away from the conveying surface 4 and forward, in accordance with the strips 5.

On the back of the part of the with the drainage grooves The link is provided with drainage channels 8 which widen towards the "rear end 8a" and which taper at the front end and guide lugs 8b. The drainage surfaces of the rear strips 5 open into the expanded part of the drainage., channels 8, so that the liquid discharged from the filter surface is discharged solely through the drainage channels. To prevent, that, especially when there is a lot of liquid, the Liquid at the front end of the link through the gaps between the grooved webs 2 and the rear bar 5 of the front

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their member and through the groove openings 6 to the filter surface flows back, the tapered guide lugs 8b of the drainage channels of a member each engage in the enlarged part 8a the drainage channels of the respective front link. This ensures that the liquid can be drained off properly takes place on the back of the filter support belt. The drainage channels 8 can be against the back of the filter support belt be open, but they are conveniently covered with a cover 11, which also serves to support the filter support belt on a base »

At the anterior and posterior end is the limb with eyes 9 and 10, which are arranged offset from one another and for connecting the individual links to one another to serve. These eyes also fulfill the function of cams with a drive or chain wheel of a filter press can work together. ·.

The links of the filter support belt are preferably made of plastic, which is known under the trade name "Delrin" known poly oxy methyl en has proven particularly effective. "*

How a filter tower works in a vertical filter tower The filter support belt is as follows;

Two filter support belts together form a downwardly tapering filter press space and are covered on the filter surface H with a filter cloth. The filter support belt moves downwards and thereby presses out the material to be pressed. The exiting liquid enters the drainage grooves 1 and flows downwards until it hits the bar 5 of the front link. Due to the inclined inclination of this bar, the liquid is deflected onto the rear side of the member into the drainage channel 8 and drained downwards. Since the ends 7 of the webs 2 are inclined in accordance with the strips 5 and at these min-

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at least approximate, is between the ends 7 of the webs 2 and the bar 5 formed a gap, the capillary action favors a smooth withdrawal of the liquid. The flow of the escaping liquid in the links of the filter support belt is indicated in Fig. 3 in dashed lines »· On the back of the links the liquid is from the drainage channel directed to the drainage channel of the individual links. The guide approaches 8b of the drainage channels of the individual. Limbs are preferably so deeply inserted into the widening 8a of the drainage channels of the following links that they open below the mouth of the drainage surfaces of the rear strips 5. Through this the return of fluid between the gaps in the limbs and the openings 6 of the drainage grooves is prevented.

At the lower end of the press chamber, the filter support belts are deflected, thereby releasing the filter cake. In order to prevent any residual drops from the relaxed filter cake from being absorbed again when the filter cake is deflected, the members are designed in such a way that a gap forms between the ends 7 of the webs of the rear member and the bar 5 of the front member when they are deflected forms, which tapers in the direction of the filter surface ¹ I '<eg. As a result, a capillary force is generated in the gap on the side facing away from the filter surface, which also pulls the last drop of liquid backwards from the filter surface. A perfect drainage of the liquid from the filter surface or the filter cloth is thus achieved. In the course of the increasing deflection of the individual links of the filter support collar at the lower end of the filter press chamber, the links between the front end 7 of the webs 2 and the bar 5 of the front link form an opening that prevents the liquid from escaping from the drainage channels on the back of the links enables. This

The links are opened to the extent that the press

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BATH ORIGINAL

space is removed so that the escaping liquid can no longer reach the material to be pressed.

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Claims (2)

Claims Filter support belt for a continuously operating filter press, which has articulated links containing drainage devices, each link having drainage grooves running in the direction of belt travel, which, viewed in the conveying direction, are closed at the rear and open in the front area to the front and towards the rear of the link Furthermore, the front ends of the webs separating the drainage grooves are inclined away from the filter surface and forward and cooperate with a correspondingly inclined rear bar of the front member running transversely to the conveying direction, the front ends of the webs at least approximating when the filter support belt is stretched stand on the bar and when the filter support belt curves away from the filter surface form tapering gaps, characterized in that drainage channels (8) are provided on the rear side of the part of each link having the drainage grooves (1), which are towards the ^: rear end and into which the drainage surface of the rear bar (5) opens and which taper at the front end and have guide lugs (8b) that protrude into the widened parts (8a) of the drainage channels (8) of the front link. 2. FiItertragband according to claim 1, characterized / that the drainage channels (8) open below the mouth of the drainage surfaces of the rear strips (5). 5. The filter carrier tape according to claim 1, characterized in that the drainage channels (8) are provided with a cover (11) against the rear of the links. 10 9 8 2 4/1721 Blank page