EP3463693A1

EP3463693A1 - Device and method for separating lightweight material from a transport airflow

Info

Publication number: EP3463693A1
Application number: EP16736771.3A
Authority: EP
Inventors: Barnstedt Dirk
Original assignee: Barnstedt Dirk
Current assignee: Barnstedt Dirk
Priority date: 2016-05-24
Filing date: 2016-05-24
Publication date: 2019-04-10
Also published as: US11794211B2; DE112016006895A5; WO2017202397A1; US20200316648A1; CA3037063C; CA3037063A1

Abstract

The invention relates to a device (1) with which lightweight fractions, such as films or paper for example, being carried along in a carrier airflow (A) are separated and discharged for further processing. The device is characterized in that the housing can be easily opened by means of two pivotal cover hoods (3, 4) in order to allow maintenance work to then be carried out safely. The first cover hood (3) has an intermediate piece (31, 31') which extends into the housing and has chamfered surfaces (30, 30') at the ends, said surfaces assuming a known specified angle α relative to the vertical, wherein the inner chamfer docks precisely against the chamfer of a guide element (27). By virtue of the arrangement of the intermediate piece (31, 31'), it is possible to service the device safely with few hand movements and without the use of tools.

Description

DEVICE AND METHOD FOR SEPARATING LIGHT GOODS

FROM A TRANSPORT AIRFLOW

The present invention relates to an apparatus and a method for the separation of light goods, such as films or paper, from a transport air flow, in particular with a device for reducing the assembly work during maintenance and cleaning work.

Such devices are known in the art from the document DE 103 15 656 A1. This document is to remove a device for separating and conveying materials in a so-called rotary feeder there, in which a rotatably mounted cellular wheel is arranged in a perforated metal basket. The cellular wheel has a plurality of elongated flat cell elements, which divides the inner volume of the rotary valve into individual segments. At the ends of the cell elements sealing lip elements are arranged, which touch the inner surface of the stripping screens of the perforated metal basket. Above the stripping screens an air injection device is arranged, which extends over almost half of the stripping screens. Through this

Lufteinblaseinrichtung the material-laden air flow is supplied to the cell wheel, so that due to the air flow through the stripping screen, the large light fractions of the material flow hang on the screen. Upon rotation of the cellular wheel, the light, stuck fractions of the Stripped and taken along sealing lip elements and then fed to an opening in the lower region of the screen drum or discharged flow-free bottom via a discharge opening.

A disadvantage of this device, it has been found that at

Maintenance work virtually the entire plant needs to be disassembled to both the screen surface as well as stuck fraction parts within the

To remove the sieve drum. This often happens

Time-consuming errors that are technically very expensive to fix. In order to eliminate these problems, the lower part of the rotary valve is opened during maintenance and cleaning work, so that the maintenance person can reach from the bottom into the interior of the drum to remove the stuck residual fractions. This type of maintenance work is cumbersome and beyond highly dangerous, because at an unwanted and

Unpredictable turning on the bucket wheel can be serious

Injuries of the maintenance person can not be excluded.

Furthermore, from the German utility model G 85 05 540.9 a similar to the aforementioned device with a rotary valve for

Separation of finely divided solids from an air stream has become known, wherein a perforated metal drum is surrounded by a cover box with the perforated metal shell a circumferential, in the outlet for discharging the

Air flow make air duct forms.

Also in this device, the above-mentioned disadvantages are disturbing in appearance, so that the effective life is greatly reduced at the same differential pressure of such a device.

Furthermore, in the prior art from the patent application DE 1 510 850 a

Cover known about a double-twisting spindle, which is hinged and consists of two parts. The cover is hinged with a hinge on the housing. Furthermore, the upper part of the Cover also hinged and fixed with a hinge to the cover.

Another embodiment of a removable hood over a

Plaster machine is the Auslegeschrift DE 27 41 059 refer. This is a device for receiving and promoting dry plaster in which a worm wheel is rotatably arranged in a housing. Above the housing, in which the worm wheel is arranged, sits a cover having a plurality of feed openings through which both liquids and solids enter the interior of the housing to the worm wheel.

A disadvantage of the latter devices, it is generally felt that always the covers must be removed with a relatively large technical effort and necessary maintenance is taken into account the safety aspect to avoid serious injury too little.

It is therefore an object of the present invention to provide an apparatus and a method which are able to maintain the device without danger and to carry out the maintenance and replacement of wearing parts with little technical effort.

This object is achieved with the characterizing features of the main claims according to the invention.

According to the invention, the device for separating light fractions from a transport air flow in a housing with at least one cover hood and at least one inlet opening and at least one guide element above a cellular wheel is characterized in that at least the surface of the flow inlet opening of the guide element occupies a predetermined angle α to the vertical and at least an intermediate piece between the Flow inlet opening and the first at least one cover is arranged.

This device is Leichtfraktionsabscheider for

Separation of coarse materials, such as paper, foil or cardboard waste from a transport air stream. The laden with recyclables air flow is injected into the material separator. The coarse material remains hanging on a perforated grid and is discharged via a rotary feeder with scrapers from the device. The dusty air leaves the separator at a designated exhaust pipe and is returned to the fan. By two large side inspection doors is at least a slight cleaning or

Checking the rotary valve and the perforated grid allows.

The method according to the invention for separating light fractions from an air stream (A) in a housing with at least one cover hood and at least one inlet opening and at least one guide element above a cellular wheel is characterized by the following method steps:

- Introducing a loaded with at least one light fraction

Air flow (A) into a housing through at least one inlet port;

- Deflection of the carrier air flow (A) by means of a curved

Guide element (27) in a rotary valve (7), in which a cellular wheel (2) is arranged with at least one dividing element (24);

- Escape of the air flow (A) from the rotary valve (7) via a perforated plate (20 '), wherein the light-weight fractions, such as films are deposited;

- Stripping and discharging the light fractions of the inner wall of the rotary valve (7) by means of at least one arm (24) on the cell wheel (2) within the rotary valve (7).

This process is used in the paper / waste and foil industries and in related industries for the separation of light goods (foils, paper, cardboard and the like) from a transport air stream used. The lightweight materials can then be fed to a conveyor belt, container, press or similar downstream systems. During operation, the light materials (sifted material) together with dusty air in the

Soaked in a lightweight separator. Coarse material and part of the entrained dust are continuously discharged via a cellular wheel. The injected dust-laden air flows through the perforated plate separating device and, depending on the system configuration, leaves the housing of the material separator due to overpressure or underpressure.

It has proved to be advantageous that at least one cover is designed to be foldable to a few simple steps and without loosening

Screw connections to the rotary valve to get.

It is important and advantageous that by means of a monitoring switching element when opening at least one cover the power supply to the

Drive elements is switched off effectively.

Furthermore, it is advantageous that at least one cover hood has at least one connecting piece. This at least one connecting piece is intended to produce a screwless line for the transport air flow into the housing.

Another advantage is seen in that the connecting piece is annular and has annular sealing elements for producing a nearly airtight connection, wherein ring is not necessarily to be understood as round.

It is also advantageous that the surface of the second cover is at least partially formed by a perforated plate through which the in the

Rotary valve air flowing in can escape again. It is also advantageous that the second cover the geometric

Dimensions of the cell wheel to be covered is adjusted so as to increase the effectiveness of the lip seals for stripping the screened light fractions.

It is also advantageous that the opening of the guide element in his

geometrical dimensions adapted to those of the intermediate piece. This measure serves to ensure that upon closure of both the first and the second cover, an almost airtight seal of the carrier air flow due to the assembly is effectively established.

A further advantage is that the two cover hoods each have at least one joint, for example a hinge, whose axes of rotation are arranged parallel and on the same opposite side of the flow inlet opening. This ensures that when lifting the two covers the bucket in the rotary valve is freely accessible from above. This is a particular advantage of the present invention, because it is ruled out that when opening one or the other cover the cell wheel is rotated, because at each cover a

Monitoring sensor is arranged, which causes an immediate interruption of the power supply for the drive of the bucket.

It is advantageous, moreover, that the exhaust pipe is arranged for the exhaust air on the same side as the axes of rotation of the hinges, resulting in considerable structural simplifications and simplifications. In addition, it is of particular advantage that the suction pipe is carried out so mechanically stable performs trained that he can take the at least one hinged cover without compromising the stability of the entire device. Due to the mechanical load-bearing design and construction of the extraction nozzle, the entire mechanical structure and construction of the covers together with the exhaust nozzle receives a particularly simple and advantageous design that allows a compact design. It is also advantageous that the guide element, the surface of the second

Cover at least partially wedge-shaped encloses. This ensures a relatively balanced flow distribution to the feeder or the individual cells.

Another advantage is that at least one inspection flap is arranged on the first cover of the housing, at least small maintenance work can be performed at the opening.

It is also advantageous that the first and the second cover is guided by means of a spring support element, resulting in that the hoods can be relatively easily opened by an operator.

It is also advantageous that at least one cover is closed by means of at least one clamping element, for example a Zugspannerklammer. Such a fastener has the decisive advantage, on the one hand to open the covers relatively quickly and on the other hand exert a relatively uniform mechanical pressure at all points of the seals.

It is also advantageous that at least one folding inspection flap is arranged below the inlet opening, which can also be opened and closed, for example with Zugspannerklemmen. At the same time this allows a functional check of the entire device.

Another advantage is the fact that at least one intermediate piece for guiding the carrier air flow (A) is arranged on at least one pivotable cover. This intermediate piece has the essential task, the flow connection between the outer flow line and the guide element for uniform introduction of the air flow in the Rotary valve to allow. For this purpose, it is necessary that a sealing element is arranged between the connecting piece of the guide element and the intermediate piece, which does not require screwing, for example two flat annular flat metal surfaces which are joined together in a dull or profiled manner.

It is also advantageous that the connection surfaces of the intermediate piece and that of the guide element occupy a predetermined angle a, a 'to the vertical in order to ensure an easy coupling to the air-guiding system.

Another advantage is that the pivotable hoods of the housing and the rotary valve at a suitable location have at least one pressure support element which is operated electrically, pneumatically, hydraulically or by spring pressure.

It is advantageous, inter alia, that the upper side of the guide element has a closed baffle and the side covers are formed as perforated plates so that at a strong carrier air flow no periodic flow oscillations arise which can adversely affect the entire air line network.

In the following, the invention will be explained in detail with reference to drawings. It shows

Figure 1 is a perspective view of the device (1) with a

Cell wheel (2) in a housing with at least two

Covering (3, 4) in the unfolded state;

Figure 2 is a perspective view of the device (1) in

closed state; Figure 3 is a schematic side view of the device (1) with

an inlet nozzle (5) and an outlet nozzle (6), which are arranged above the cellular wheel (7);

Figure 4 is a schematic side view of the device (1) in

unfolded state of the two covers (3, 4);

Figure 5 is a schematic sectional view of the device (1) in the closed state of the two covers (3, 4) on the feeder (2).

1 shows a perspective view of the device 1 with a cellular wheel 2 in a rotary valve 7, which will be described in more detail below. The cellular wheel 2 is rotatably mounted in a housing 8. The housing is essentially supported by a support structure which is constructed on a base frame 9. The bearings 10, 10 'of the cellular wheel 2 are arranged laterally of the cellular wheel on the support structure. In the immediate vicinity of the bearing 10 ', and the transmission of the drive 11 of the cellular wheel 2 is arranged. The two

Covers 3.4 are articulated in the region of the suction line of the outlet - connecting piece 6. The covers 3.4 each side

arranged pressure supports 12, which greatly facilitate the opening of the relatively heavy cover and at the same time the leadership of

Support covers 3.4. In the lower part of the housing two inspection flaps 14,14 'are arranged, which serve to do easy to carry out maintenance work quickly.

FIG. 2 shows a perspective view of the device 1 in FIG

closed state. Here, the two covers 3.4 are arranged in their intended working position, the outer

Cover 3 is held by means of Zugspannerelementen 15 in the closed state. The Zugspannerelemente 15 essentially serve the, Cover 3 to open quickly and safely to perform possible maintenance quickly. The surface of the air inlet opening at the inlet nozzle 5 is inclined at a predetermined angle α to the vertical, so as to provide an advantageous coupling of the nozzle 5 to the flow control system without

Fittings or other fasteners that are only to use with tools to allow.

FIG. 3 shows a schematic side view of the device 1 with an inlet connection 5 and an outlet connection 6. The upper cover of the first covering cover 3 is designed to be curved in the rear part 16 in order to make favorable the flow conditions within the housing. This avoids larger turbulences inside the housing. The

Side walls 17 of the first cover 3 are substantially planar sheets on which an inspection door 18 is arranged at a suitable location. The surface 19 of the inlet opening of the inlet nozzle 5 assumes a predetermined angle a 'to the vertical. It is in principle meaningless whether the surface 19 assumes a slope or slope. Due to the slope, the weight of the cover 3 u.a. reduced, which is beneficial to the unfolding of the

Cover hood affects.

FIG. 4 shows a schematic side view of the device 1 in FIG

unfolded state of the two covers 3.4. The rotary valve, which forms part of the housing, consists in the lower part of a

arcuate closed sheet metal 20 that is attached to the base construction 9 and stored. The Strömungsauslassstutzen 6, in this illustration on the left side, is arranged slightly above the center of the rotary valve 7 for flow reasons. In order to gain access to the cell 2 within the rotary valve 7, the first

Pull tensioner elements 15 of the first cover 3 to solve, in order to then raise the cover 3 with the support of the printing elements 12. The joints 21 of the first cover 3 are arranged above the outlet nozzle 6. At least a part 6 'of the outlet nozzle 6 is formed mechanically stable so that he the loads of the upper cover 3 and the lower

Cover 4 withstands. The joints 21 'of the second cover 4 are arranged approximately at the same height as the lower side of the outlet nozzle 6', which offers considerable structural advantages. The pressure support elements 13 of the second cover 4 are attached at the upper edge of the second cover 4 with one end and with the other end 22 on the

Support structure for the storage 10,10 'of the cellular wheel 2.

FIG. 5 shows a schematic side sectional view of the device 1 in the closed state. On the axis 23 of the cellular wheel 2 radially five arms 24 are arranged in the present embodiment in a star shape at equal angular intervals, at the ends of each of which a lip seal 25 is fixed, which touch the inside of the rotary valve 20, 20 'lightly. As already mentioned above, the lower half of the rotary valve 7 is made of a

closed sheet 20 made in the lower part of a

Material outlet opening 26, via which the from the upper part 20 '

stripped light fractions, such as paper or foil discharged. Over the upper half of the rotary valve 7 extends over the entire length of a perforated plate 20 ', from which the injected air flow can escape at least partially. The plane light fractions entrained by the carrier flow remain suspended on the grid of the perforated plate 20 'and are then entrained by the lip seals 25 during rotation of the cellular wheel 2 and discharged through the outlet opening 26. About the upper part 20 'of the rotary valve 7 extends approximately in the middle of the drum

Guide element 27 over part of the surface of the sieve-shaped part 20 'of the rotary valve. The guide element 27 is curved and wedge-shaped and extends at least partially over the surface of the screen plate 20 '. The upper part 28 of the guide element 27 is a closed sheet without

Openings, in contrast to the lateral walls 29 of the guide element, which are made of a perforated plate. These perforated plates fulfill the purpose that the relatively large air volumes of the air flow are compensated for escape in order to avoid periodic vibrations within the Housing and flow lines arise. The guide element 27 terminates with an annular sealing surface 30, which assumes a predetermined angle α to the vertical. The annular sealing surface 30, which extends around the inlet opening of the guide member 27, has exactly the same geometric dimensions as the docked thereto, in side view wedge-shaped

Intermediate piece 31 which is fixed to the first cover 3. The second part of the wedge-shaped intermediate piece 31 'forms practically an extension of the intermediate piece. The extension 31 'of this intermediate piece 31 forms in practice the inlet pipe 5 for the carrier air flow A, which is composed of a mixture of air and solids. The surface 30 'of the end of the inlet nozzle 5 also has a slope at the angle a' to the vertical, so that the entire intermediate piece, consisting of two parts in the present case, is wedge-shaped, so that the weight of the pivotable cover 3 as possible small. To the

Pads 30,30 'is in each case a sealing element for sealing the

Flow line provided.

In summary, it may be stated that with the present invention, a device 1 is presented, are separated with the light entrained fractions, such as films or paper, in a carrier air stream A and subsequently discharged reusable. These

Device is characterized in that the housing by two

swiveling covers 3.4 can be easily opened without the use of any tools to subsequently safe maintenance

to carry out. In this case, the first cover 3 at least one intermediate piece 31, 31 'that extends into the housing of the device 1 and at its ends inclined surfaces 30,30', which occupy a certain predetermined angle α to the vertical, wherein the inner Sloping exactly at the slope of a guide element 27 docks. As a result of the arrangement of the intermediate piece 31, 31 ', it is possible to clean the device safely and with a few simple steps.

Claims

1 . Device (1) for separating light fractions from a

Carrier air flow (A) in a housing with at least one cover (3, 4) and at least one inlet opening (5) and at least one guide element (27) above a rotary valve (7), characterized

that the area of the flow inlet opening (30) of the guide element (27) assumes a predetermined angle a, a 'to the vertical and at least one intermediate piece (31, 31') between the

Guide element (27) and the at least one flow inlet opening (32, 32 ') at least one cover (3) is arranged.

2. Apparatus according to claim 1, characterized in that the

at least one cover (3.4) is arranged foldable and formed.

3. Apparatus according to claim 1, dad urch gekennzeich net that

at least one cover hood (3) has an intermediate piece (31, 31 ') which is arranged on the first outer cover hood (3).

4. The device according to claim 1, characterized dad urch gekennzeich net, that the sealing openings, or flow inlet opening (32, 32 ') of the

Intermediate pieces (31, 31 ') are annular and optionally annular sealing elements to form an almost airtight connection.

5. Device according to one of the preceding claims, dad urch in that the surface of the second inner cover (4) is at least partially formed by a perforated plate (20 ').

6. Apparatus according to claim 1, dadu rch in that the second cover (4) the geometric dimensions of

to be covered cell wheel (2) is adjusted.

7. The device according to claim 1, characterized in that the opening (30) of the guide element (27) of the opening of the intermediate piece (31) is adapted.

8. The device according to claim 1, dad u rch in that the two covers (3,4) each have at least one hinge (21, 21 '), the axis of rotation parallel and at the same

opposite side of the inlet opening (32) is arranged.

9. Device according to one of the preceding claims, characterized

characterized in that the suction nozzle (6) on the same side as the axes of rotation of the joints (21, 21 ') is arranged.

10. Device according to one of the preceding claims, dad urch

characterized in that the suction nozzle (6) is formed so that at least one joint (21, 21 ') of at least one cover (3) is received mechanically stable above the suction nozzle (6).

11.Vorrichtung according to any one of the preceding claims, characterized

in that the guide element (27) encloses the surface (20 ') of the second cover hood (4) at least partially wedge-shaped.

12. Device according to one of the preceding claims, characterized

characterized in that at least on the first cover (3) at least one inspection door (18) is arranged.

1 3. Device according to one of the preceding claims,

characterized in that at least one

Cover (3) a pressure support element (12, 13) is arranged.

14. Device according to one of the preceding claims,

characterized in that at least one covering hood (3, 4) is closed by means of a tensioning element (15), for example tension clamp.

15. Device according to one of the preceding claims, characterized

characterized in that below the inlet opening (32) at least one hinged inspection flap (14, 14 ') is arranged.

16. Device according to one of the preceding claims, characterized

characterized in that at least one pivotable cover (3,4) at least one intermediate piece (31, 31 ') for guiding the

Carrier air flow (A) is arranged.

17. Device according to one of the preceding claims, characterized

in that at least one connection surface (30, 32) of the at least one intermediate piece (31, 31 ') assumes a predetermined angle a, a' relative to the vertical.

18. Device according to one of the preceding claims, characterized

characterized in that the pivotable covers (3,4) of the housing and the rotary valve (7) at a suitable location at least one Druckstütztelement (12,13), which is operated electrically, pneumatically, hydraulically or by spring pressure.

19. Device according to one of the preceding claims, characterized

in that the pivotable covering hoods (3, 4) are closed by tension clamps (12, 13).

20. Device according to one of the preceding claims, characterized in that the upper side (20 ') of the guide element (27) has a closed arcuate guide plate (28) and the lateral walls (29) are formed as perforated plates.

21. A method for separating light fractions from a

material-laden air stream (A) in a housing with at least one cover (3,4) and at least one inlet opening (32) and a guide element (27) above a rotary valve (7), gekennzeich net by subsequent process steps:

- Introducing a loaded with at least one light fraction

Air flow (A) into a housing through at least one inlet port;

- Deflection of the carrier air flow (A) by means of a curved

22. The method of claim 21, dad urch geken nzeichnet that the opening of the at least one cover (3.4) without screws and without the aid of tools.

23. The method of claim 21, dadu rch geken nzeich net that an

at least one pivotable cover (3,4) at least one intermediate piece (31, 31 ') for guiding the carrier air flow (A) is arranged.