DE1231213B - Filters, especially for mashing - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY DEUTSCHES '/ mTW> PATENTAMT

EDITORIAL

Int. Cl .:

BOId

German KL: 12 d- 16/02

Number:
File number:
Registration date:
Display day:

D39663VIIb / 12d
August 21, 1962
December 29, 1966

The invention relates to a filter, in particular for mashing, with several parallel to each other and around Filter elements grouped on a vertical axis and arranged in a radial pattern above and below Turbidity chambers, which are successively connected via a distributor with lines for turbidity, extraction liquid, Wash liquid and compressed air are connected.

A filter of the type indicated above is already known from US Pat. No. 2,068,257. That known filter is intended for removing wax from cooled mineral oil and contains in one vertical tower a number of filter troughs arranged one above the other, each having three sectors, which are connected to a stationary distributor and in which the filter cake is formed, washed or is removed. The filter elements are arranged around the circumference and move cyclically through the different ones Sectors. The first sector becomes cloudy through the distributor, the second sector is washed with washing liquid and compressed air is supplied to the third sector. The well-known filter works continuously, it does however, it is not suitable for certain uses that involve vibration of the filter cake should be avoided, as it is, for. B. is the case in the filtration of mashes.

A filter is already known from Belgian patent specification 529 621 in which the filter cake rests during the filtration. However, this known filter does not work continuously.

The invention is based on the object of creating a filter, in particular for mashing, which is continuous works, avoids vibrations of the filter cake and also easily different Adjust throughput rates.

This is achieved according to the invention in that the distributor with respect to the pulp and filter chambers is rotatable and each group of sludge chamber and filter chambers of the two adjacent Groups is separated by dense, approximately radially extending walls and that the conical upwards tapered filter elements of a group lie one on top of the other and each turbidity chamber is one of the central ones The filling opening for the pulp, which is close to the axis, as well as a closure arranged at the edge for the solids discharge has, while the filter chambers are each connected to two separate channels, via the distributor on the one hand with the suction line for the filtrate and on the other hand with the feed or the suction line for the washing liquid are connected.

According to a further development of this filter, the filters are, in particular, for mashing

Applicant:

Pierre Diebold,

Malzeville, Meurthe-et-Moselle (France)

Representative:

Dr.-Ing. E. Sommerfeld and Dr. D. v. Bezold,

Patent Attorneys, Munich 23, Dunantstr. 6th

Named as inventor:

Pierre Diebold,

Malzeville, Meurthe-et-Moselle (France)

Claimed priority:
France of August 24, 1961 (871481),
dated August 8, 1962 (906 396)

independent channels, which connect the even and odd intermediate chambers, in the middle part of the apparatus on both sides of the central channel serving to supply the pulp.

The invention will now be described in greater detail on the basis of exemplary embodiments in conjunction with the drawing be explained, it shows

Fig. 1 is a vertical section through a filter according to the invention,

FIG. 2 shows a section partly along a surface II-II in FIG. 1,

F i g. 3 a perspective view of a flexible fitting of a filter element,

4, 5 and 6 partial views in vertical section a filter according to the invention during the filtration, extraction or emptying phase,

F i g. 7 a fig. 1 corresponding view of a further embodiment of the invention,

8 is a sectional view taken along a surface VIII-VIII in Fig. 7,

9 shows a sectional view along a surface IX-IX in FIGS

FIG. 10 is a sectional view taken along an area X-X in FIG. 7.

The filter shown in Figs. 1 and 2 according to the invention mainly contains a box, which consists of a preferably prismatic body 1, which has a base 4 and a cover 5,

609 749/279

which preferably have the shape of truncated pyramids, is connected to a central cylinder 2, in which a vertical shaft 3 is rotatably mounted.

In the box there are grids 6, which are inclined with respect to the horizontal, surround the cylinder 2 in a radial manner and are equally spaced from one another. The spaces between two consecutive grids form chambers 7 for the pulp, which are separated from each other by spaces 6 α, 6 b , which are also formed by the grids. The box is divided into η equal sectors or sections by partitions 8. As a result, the chambers 7 for the pulp and the spaces 6 a, 6 b are divided into an equal number η of chambers 7 or between connected spaces.

In the chambers 7 there are filter elements 9, which preferably consist of metal or plastic frames on which permeable membranes are mounted. The filter elements are preferably each carried by a flexible fitting 10 (FIG. 3) in the form of pliers through which a filling opening 11 passes in the middle. The flexibility of the fitting 10 ensures that the filter elements 9 remain taut. The tension can also be increased by a spreading arrangement 12, which consists of two struts which are articulated to one another and to the arms of the armature 10.
■ The struts can also be used to remove the filter elements if the latter are to be replaced. It is sufficient here to exert an outward pull on the connecting gel of the struts in any way.

The chambers 7 are each on the side opposite the filling opening 11 by a swivel lock 13 closed, which is used to discharge solids. The individual closures of the chambers of a Sector can be operated simultaneously by one and the same control device 14.

The chambers 7 for the pulp are fed by a first channel system 15, which is provided in the shaft 3 for supplying the pulp to be filtered and also by a second channel system 16, which is also arranged in the shaft 3 and for supplying a washing or Rinsing liquid, such as water and compressed air, is used for emptying. The two duct systems are connected one after the other to the openings 11 as the shaft 3 rotates.

Two sets of perpendicular lines 17, 18 connect the odd interleaved spaces 6a and the even interleaved spaces 6b through a concentric to the shaft 3 collecting chamber 19 with two channel systems 20 and 21, respectively, which are formed in the shaft 3, end in annular grooves, and serve to divert the filtrate flowing out of the nested spaces during the filter phase, to supply the extraction liquid or to discharge the filtrate during the washing or leaching phase and finally to supply a rinsing liquid during the emptying phase.

In operation, each revolution of the shaft 3 in each chamber 7 corresponds to a complete filtration cycle with the following phases:

a) Filtration (Fig. 4): The channel system 15 provided for supplying the pulp is connected to the filling openings 11, the chambers 7 of the relevant sector fill with the pulp to be filtered. The filtrate that has flowed through the filter elements 9 flows in the direction of FIG. 4 drawn arrows through the channels 17, 18 and is caught at the ends of the channels 20, 21. b) leaching (Figure 5). The extraction liquid is introduced via the channels 20 and the conduits 17 in the odd interleaved spaces 6a and flows through the filter elements in the slurry chambers 7 to wash to the filter cake.

ίο The filtrate flows through the spaces 6b, the lines 18 and the channels 21 in the direction of FIG. 5 arrows. The lines 18 and the channels 21 are kept under atmospheric pressure or preferably under a certain negative pressure.

c) Emptying and regeneration of the filter elements (Fig. 6): While the closures 13 are raised and the channels 16 are in communication with the openings 11, compressed air and also washing liquid introduced into the sludge chambers 7. the

ao washing liquid is introduced in the same way through the channels 20, 21 and the lines 17, 18 into the spaces 6a, 6b , the filter cake is ejected from the chambers 7, and the surfaces of the filter elements are cleaned and regenerated.

If the cycle has a total duration of T and η sectors are present, the duration of the filter phase is T / n, the duration of the emptying phase is T / n and the duration of the leaching phase is T- (2 T / n).
The filter can also be used for discontinuous filtration, the different sectors are then fed in parallel through separate feed lines for the pulp, the extraction liquid, the washing liquid and the compressed air.

In the following, a modified embodiment of the invention will now be based on FIGS. 7 to 10 explained.

F i g. 7 shows an approximately umbrella-shaped filter which, in its basic features, corresponds to the arrangement described at the beginning. Identical components are therefore provided with corresponding reference symbols which are identical to the reference symbols in the first embodiment, increased by the number 100.
A cylindrical box 101 is divided by vertical partitions 108 into radial sectors in which pulp chambers alternate with spaces between them.

The central cylinder 102 is traversed over its entire height by a channel arrangement which feeds the intermediate chambers 106 a and 106 b as well as the sludge chambers 107 of the individual areas lying between two successive partition walls 108.
Preferably, as shown in more detail in FIGS. 8, 9 and 10, a first central channel 122, the sludge chambers 107. On both sides of the channel 122 are two channels 123 a, 123 b, through which the uneven spaces 106 α can be fed. The channels 123 a, 123 b can be connected to one another along the entire height of the filter or they can also be separated from one another.

Finally, there are two channels 124 a, 124 b on both sides of the central channel 122 in the channels 123 α and 123 b, which are connected to the even-numbered spaces and in particular allow these spaces to be emptied. The various channels are fed in a desired sequence through a circulating distributor 103,

which is arranged at the top of the filter and shown in FIG. 7 is shown schematically.

According to the invention, the spaces or chambers here consist of physical elements, while the chambers to receive the slurry from the spaces between two successive ones Intermediate chambers are formed. In the with reference to FIG. 1 described embodiment, however, the chambers for receiving the sludge is formed by physical components, while the intermediate chambers are formed by the interspaces were formed between two successive pulp chambers.

From the F i g. 8 and 9 can best be seen that the intermediate chambers contain a grid 125, which consists of flat bars 126, which run approximately radially, are preferably inclined and with each other are connected by cross braces 127. The rods are also preferably in a rigid frame 128 clamped. There are two filter membranes 109 on the top and bottom of the grid 125 attached, which thus enclose the interior of the frame 128 forming an intermediate chamber. as Filter membrane can be used any suitable material, for example plastic or also a fine metal net. The frame 128 and its grid 125 can also be entirely closed Be surrounded by the filter bag.

The intermediate chambers described are fastened in the filter box by means of a hollow rod 129 which is provided with an internal thread and which is fastened to the cylinder 102. The chamber is pushed onto the rod 129 and fastened by means of a screw 130 screwed into the rod 129. So that the rod 129 is not stressed as a self-supporting carrier, cross struts 131 are preferably provided, which run transversely to the axis of the intermediate chambers and are fastened to the vertical partition walls 108. The intermediate chambers 106 a, 106 b then rest on these cross struts 131.

From Fig. 9 it can be seen that a seal 132 is provided between a rear surface 128 α of the frame 128 of an odd-numbered intermediate chamber 106 a and the central cylinder 102. The rear side 128 a, the seal 132 and the cylinder 102 are provided with holes 128 b, 132 a and 102 a, respectively, through which the channels 123 a, 123 b are in communication with the interior of the intermediate chamber. In a corresponding manner, according to FIG. 10, between a rear side 128 c is an even-numbered intermediate chamber

106 & and the cylinder 102 a sealing arrangement 133 is provided. The rear wall 128 c, the seal 133 and the cylinder 102 are provided with openings 128 a ¹ , 133 a and 1025, respectively, through which the interior of the even-numbered intermediate chamber communicates with the channels 124 a, 124 b.

The cylinder 102 also has openings 102c (FIG. 8), which the channel 122 with the individual Connect turbidity chambers 107, which are through the spaces between two successive Intermediate chambers are formed.

On the periphery of the filter box 101 there are closures 113, which are normally on the outside of the box and the lower end of the sludge chambers

107 lock. The closures are automatically controllable at the end of each filtration cycle, so that the filter cake that has accumulated in the sludge chambers can be removed.

The improved filter of this embodiment works in exactly the same way as that described above Arrangement. Each revolution of the distributor 103 corresponds to a complete working cycle each individual pulp chamber 107 with the successive work phases: filtration, leaching, Emptying and regeneration of the filter elements.

During the filtration phase, channel 122 is fed through the manifold and supplies the one to be filtered

ίο Turbidity through the openings 102 c into the chambers 107. The feed is generally under pressure, and the filtrate passes through the filter membranes 109 of the intermediate chambers located above and below the individual chambers 107 and is then transferred from the channels 123 a, 123 b, 124 a and 124 b added, which open out at the manifold 103. The filtrate is then led to the outside through a collecting drainage channel (not shown).
During the extraction phase, extraction liquid is introduced through the channels 123 a, 123 b into the odd-numbered chambers 106 a, it then flows across the sludge chambers and is then withdrawn from the even-numbered intermediate chambers 106 & through the emptying channels 124 a, 124 &.

In the phase of emptying and regeneration of the filter elements, the closures 113 are finally opened and the channels 122, 123 a, 1235, 124 a and 124 b are fed with compressed air or washing liquid or with both media to remove the filter cake and the filter elements 109 to clean.

The embodiment described has the particular advantage that the seal is very simple. In practice, the only places to be sealed are the seals 132, 133, which are particularly are easy to assemble and assemble. It can also be seen that the shutters 113 only must seal the filter box to the outside, but not the individual sludge chambers of a vertical row against each other.

The embodiments described above can be modified so that the Filter box containing filter elements with respect to the distributor arrangement connected to the supply elements running around, which is then established. Since the filter cake also in this case with respect to the surrounding Liquid is at rest and not as in the USA patent from the various Liquids being removed and re-immersed in them can also be the goal that way the invention can be achieved, namely vibrations and damage to the filter cake avoid.

Claims (2)

Patent claims: 1. Filter, especially for mashing, with a plurality of filter elements grouped parallel to one another and around a vertical axis as well as sludge chambers arranged radially above and below, which are successively connected via a distributor with lines for sludge, extraction liquid, washing liquid and compressed air, characterized in that the distributor (3) is rotatable with respect to the pulp and filter chambers and each group of pulp chamber and filter chambers (7, 6 a, 6 b) is separated from the two adjacent groups by tight, approximately radially extending walls (8) separates and that the conically upwardly tapered filter elements (9) of a group lying one above the other and each pulp chamber (7) has a filling opening (11) for the pulp, which is close to the central axis, and a closure (13) arranged on the edge for the solids discharge, while the Filter chambers (6 a, 6 b) are each connected to two separate channels (17, 18), which are connected via the distributor (3) on the one hand to the suction line for the filtrate and on the other hand to the feed or suction line for the washing liquid . 2. Filter according to claim 1, characterized in that the independent channels (123 a, 123 b and 124 a, 124 b), which each connect the even (106 b) and odd (106 a) intermediate chambers, are arranged in the central part of the apparatus on both sides of the central channel (122) serving to supply the pulp. Documents considered: German Patent No. 25 740; German Auslegeschriften Nos. 1088 469, 1104 491; German patent application Sch 5832 IVb / 12d (published on December 20, 1951);
Belgian Patent No. 529,621; British Patent No. 645 260; U.S. Patent No. 2,068,257. For this purpose 2 sheets of drawings 609 749/279 12.66 © Bundesdruckerei Berlin