DD227451A1 - METHOD AND APPARATUS FOR FLEECE DISPOSAL OF GERBUM DRUM - Google Patents

Abstract

The invention relates to a method and the associated device for fleet removal from Gerbtrommeln in application of the physical siphon principle. This achieves energy-efficient, reliable and low-maintenance work. The technological change in tanning drum processes often made fleet change can thus be included in the program control, even with older Gerbtrommeln. Fig. 1

Description

Title of the invention

Method and device for liquor removal from tanning drums

Field of application of the invention

The invention relates to a method and the associated device for removing liquors from tanning drums with a separate collecting space in the field of leather production. Methods and apparatus can also be used in all other fields where drum processes are used with drums revolving around horizontal axes, e.g. in the field of smoking products.

Characteristic of the known technical solutions

In the production of natural leather Gerbtrommeln be used to perform the chemical-physical operations is. These tanning drums are rotatable about a horizontal axis, closed on all sides vessels.

Modern tanning processes require that the liquors (water, tanning solution, etc.) be changed during the processes, or that the liquors are removed before the vessel is emptied at the end of the process. The liquor deduction is carried out by various methods and devices. The best known is the removal of the fleet through a flushing lid. Here is the existing in the drum shell, entering the raw hides and removing the finished leather serving larger opening

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ZS closing lids replaced by a just such, but perforated. Thus, at each revolution, the liquor runs out of the drum.

The disadvantage is that this method is not suitable for program-controlled Gerbtrommeln by the need for the cover change (interrupted process), which must be done manually. Furthermore, the fleets are emptied freely under the drum, so that-released gases and vapors can enter the working space.

Next is known emptying the tanning drum mounted on the drum shell closable openings that are opened or closed manually or remotely. Manually operated openings also exclude the inclusion of the process in a program flow. The fleets also emerge freely in this system and thus gases and vapors in the room.

Furthermore, scooping devices of different design which are known in the interior of the drum and which allow the liquor in the scoop to flow away with a natural gradient through the hollow drum axis are known. This procedure is in

IfS its performance limited by the size of the scoops and the speed of the tanning drum. Relatively large emptying times are created which prolong the processes. Furthermore, these devices work only in one direction of rotation although technologically the drums in bei-

SO have to rotate the judgments. The previously known scooping systems are also prone to rapid constipation due to hair and skin debris.

In addition, it is known the suction of the liquor by means of feed pump via suction pipe, which passes through the hollow axis of La

jrsr gerzapf ens leads. This method is preferably applied to program-controlled tanning drums. The disadvantage is that only self-priming pump systems can be used. Due to the hair, fiber and skin particles contained in the fleet, blockages in the suction

So systems self-priming pumps on. When using

However, screw pumps, which are relatively insensitive to such impurities, there is the disadvantage of a very high wear on the stators. Furthermore these pumps are very sensitive to a run dry, so that S extensive measures to prevent such are necessary.

Object of the invention

The aim of the invention is to provide a method and an associated device for removing liquors from Gerbtrommeln that operate reliable and.wartungsarm, are insensitive to fleet contaminants, prevent the escape of gases and vapors from the fleet into the workspace and the inclusion of Enable fleet deduction in the program control.

a Presentation of the essence of the invention

The invention has for its object to provide a method and associated device, the dragnet liquor tannins reliably dissipate, can be incorporated into the program-controlled process, avoid disturbing influences SO to the outside and work with minimal energy.

According to the invention, this is achieved by a device which consists of the main elements of liquid collecting container, suction line, discharge line and vacuum generator.

The essence of the invention is the combination of these main elements to apply the physical siphon principle, thereby eliminating sufficient dimensioning of the tube cross-sections without adversely affecting the functional process clogging, harmful gases

Qc and vapors with dissipate and integrate the entire process with minimal energy consumption in the program-controlled process control.

embodiment

The invention will be explained below with reference to an example closer SS . In the accompanying drawing shows

Figure 1 shows the arrangement of the individual main elements.

The liquid collecting container 1 arranged outside the tanning drum 6 is allowed to seal the suction pipe 2 immersed in the fleet 10, which is sealed by the bearing journal

-100 9 is guided in the separated by the perforated bottom 7 from the rest of the tanning chamber collecting chamber 8, which closes in the collecting channel 5 submerged drain line 3 and the vacuum and euger 4 on all sides. At the moment of suction, a vacuum hp & h is applied to the liquid receiver 1. created. This increases the fleet in the pipes 2; 3 according to the vacuum until the liquid from the suction line 2 can flow into the sump 1. In the collecting container 1 is formed by the inflowing liquid a static gradient ru> 0 whereby this is pressed into the collecting channel 5. 0bwo.hl. Now that the process takes place independently, the vacuum generator 4 constantly runs with it, in order to prevent air from entering the suction line 2 briefly, especially when the liquor is low or due to liquor withdrawal with the tanning drum 6 moved and the liquid level moved ER ¹ ford variable vacuum to rebuild.

In this system, without negatively affecting the function, very large pipe cross-sections 2; 3 are used. This completely eliminates the risk of clogging and at the same time achieves short emptying times.

After the deduction _{e of} the fleet via the vacuum generator at the same time a discharge of harmful gases and vapors from the interior of the tanning drum 6. These 1Z S thus safely discharged from the working space above the roof.

Claims (2)

invention claim 1. A method for liquor removal from tanning drum in application of the siphon principle, characterized in that at the moment of Absaugbeginns to the liquid collection tank (1) a vacuum hp "α h-, generated by a system belonging to the vacuum generator (4), is applied, thereby liquid in the pipes (2, 3) corresponding to the vacuum rises until it flows from the suction line (2) into the collecting container (1) and pressed by the resulting static drop h ~> 0 "through the discharge line (3) in the collecting channel is, whereby the process now runs independently, but the vacuum generator (4) continues to run with it to be able to rebuild the vacuum immediately with short-term air inlet into the suction line (2). 2. Device for liquor removal from Gerbtrommeln in application of the Saugheberprinzips, characterized in that these from a liquid collecting container (1), in which a suction line (2), through the hollow bearing pin (9) into the tanning drum (6), a discharge line (3) whose mouth is always under the liquid level of the collecting channel (5) and a line of a vacuum generator (4) open, completed by the liquor level (10) in the collecting space (8) of the tanning drum (6), the liquid level in the collecting channel (5) and the vacuum generator (4) on all sides , consists. For this 1 sheet drawing