DE102013003113A1 - Autonomous working mobile separator, has air separator producing cleaning air to ventilator that is located on basic frame, and ventilator connected to safety filter, where separator together with filter is arranged downstream on gear - Google Patents

Abstract

The separator has a basic frame (1) located on a landing gear (3). An air separator (10) is secured on a work platform (2). The air separator produces cleaning air to a ventilator (21) that is located on the basic frame. The ventilator is connected to a safety filter (37), where the separator together with the safety filter is arranged downstream on the gear. Docking devices (5, 15), a tank car inlet, and terminals (17, 18) are arranged on the gear, where docking devices are adapted for silo discharge, and tank car inlet and terminal adapted for producing electric current and compressed air. An independent claim is also included for a method for operating a mobile separator.

Description

The invention relates to an autonomously operating mobile classifier according to the preamble of claim 1. A mobile classifier, however, does not operate autonomously, is, for example, with the subject of EP 2 505 272 A1 known.

From granulation to shipping, plastic granulate is subjected to certain process steps that influence the delivery quality.

Abrading on the granulator, cooling temperature limitation, pneumatic conveying, mixing, storage, loading and sagging lead to the formation of abrasion, which can occur in various forms as fines, filaments, waste or breakage. The type and size depends on the type of plastic and causes great problems in the further processing of the plastic granules to the final product.

Due to their quality specifications, the processors influence the manufacturers who install granule cleaning systems in the production facilities or by influencing the transport speed, eg. B. by (slow promotion or highly charged flight promotion, also called BEACH PHASE) or shot peened tube inner wall minimize unwanted abrasion. A hundred percent abrasion avoidance is economically not possible in the current state of the art due to physical conditions. Slow conveyor systems produce very fine abrasion due to the high delivery pressure, while systems with higher speeds produce coarser abrasion and filaments.

Granule cleaning systems are available from about 50 kg to 100 t / h.

Especially the larger ones are installed after being conveyed to the silo plant before being distributed to the silos. There is still a need for transport to the silo battery and the loading or bagging silo with longer residence times, depending on the type of product.

However, experience has shown that the fines accumulations described in FEM 2 482 are found in the silos that are the subject of warnings when taking samples. Such accumulations of fines are certainly also to be found in tank trucks, containers or sacks.

It is therefore necessary to carry out the granulate cleaning only under the loading or bagging silos or on the processing machine.

Because silo batteries are installed in the prior art to accommodate storage capacity and product types, the technique of equipping each silo with a downstream classifier is uneconomical.

Stationary classifiers of this kind are with the US 5,035,331 . US 6,595,369 . US 7,380,670 and US 7,621,975 known.

The EP 2505 272 A1 discloses a technology in which the separator is combined on a traveling device with a washing air fan with connection to silo outlet, vehicle filling and dedusting to the stationary filter system. Another requirement is to configure the device operation so that adjustments of the individual operating parameters due to the many different Sichter locations are safe and easy to use.

As is known, in a stationary filter system, the transport path of the dust to the filter is always longer, the farther the silo connected to the separator is removed from the filter system, because the delivery line has a considerable length. Since the length of the delivery line plays a role in the pressure loss formation, the air volume of the fan decreases over the length of the delivery line according to its characteristic.

Since the total pressure loss consists of throttling and transport distance, the throttling must be readjusted to optimize the classifier on each silo in order to achieve the optimum operating point of the classifier on the fan characteristic curve. The disadvantage is that the fan must be designed for the occurring largest pressure, and indeed according to the distance from the farthest silo to the stationary filter system with appropriate reserve.

Another risk in the operation of a delivery line is the large number of coupling points to be closed on the delivery line in the direction of the filter system to which no classifier is connected.

The mobile sifter after the EP 2 505 272 A1 does not work autonomously because it has to be connected to a central filter system. In such a stationary filter system, however, the transport paths of the dust to the filter are different or longer, the farther the silo connected to the sifter is removed from the filter system.

The invention is therefore based on the object, a method and an apparatus of the type mentioned in such a way that one or more mobile classifier completely self-functional on the silo battery axis movable when loading between silo outlet and loading vehicle can be interposed without time and are designed so that when changing to other types of granules, a cleaning in an acceptable period of time is possible.

The above object is solved by the technical teaching of claim 1.

An essential feature of the invention is that the system according to the invention now operates autonomously, which means that the separator (or called cyclone), in conjunction with the safety filter (or inline filter called) and fan are arranged together on a trolley and in Combine with the other features to form a mobile unit.

This was not the case in the prior art. In the prior art after the EP 2 505 272 A1 the separator, the associated safety filters and the fans were arranged externally. It was therefore necessary a central filter system, which was associated with the aforementioned disadvantages.

This is where the invention begins, which for the first time describes a completely autonomous mobile sifter.

To solve the task a chassis is therefore provided on which the classifier jointly with fan and separator or filter firmly cased together form a common unit and the docking devices are provided only for silo outlet and tanker tank inlet and connection for electrical power and compressed air.

The amount of air is set at startup and requires no further variation, since different lengths transport routes omitted and the sighting at the beginning of the run without a long search of the operating point is immediately effective. However, a variation in the amount of air is possible for granules with different bulk densities.

When determining the fan, a lower pressure can be used, which makes a positive impact on the electrical power to be installed.

According to the invention, a method for operating an autonomously operating mobile classifier is that the entire system is designed as a closed loop. It is therefore a self-contained system, since the washing air provided by the fan is fed back to the separator via a safety filter on the suction side. Possible outgassing residues arrive in the most enclosed levels between silo outlet and tanker entrance, but not from the system into the surrounding area

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

All information and features disclosed in the documents, including the abstract, in particular the spatial design shown in the drawings, are claimed to be essential to the invention insofar as they are novel individually or in combination with respect to the prior art.

In the following, the invention will be explained in more detail with reference to a drawing which merely represents one embodiment. Here are from the drawings and their description further features essential to the invention and advantages of the invention.

Shown schematically are the functional parts of an autonomous mobile sifter.

On a base frame 1 is a work platform 2 arranged. The basic frame 1 is on a landing gear 3 supported, which is freely displaceable in a factory level on the ground. Accordingly, the entire suspension under any outlet 42 a storage silo moved by a slide 43 is completed.

The contaminated with dust and foreign matter material is with the slide open 43 from the spout 42 subtracted and falls over a docking flange 4 in a material inlet 5 , on which a height-adjustable telescopic tube 6 attaches.

The telescopic tube 6 is according to the docking height to the outlet 42 The storage silo in height adjustable by one or more adjusting cylinder 7 are provided, which is the telescopic tube 6 adjustable in length.

At the outlet of the telescopic tube 6 is a slider 9 (or a rotary valve) arranged. The material falls in the direction of the arrow 44 into the inlet side of an air classifier 10 (DeDusters), which in its interior a fluid bed unit 11 includes, also called wash decks.

Through the ceiling of the fluid bed unit, wash air flows against the incoming granules and removed from the granules fines, dust and short threads. Longer filaments are deposited primarily in the venturi zone of the air classifier.

The cleaned granules leave the air classifier 10 over the spout 45 and falls in the direction of the arrow 14 down into a stuffing tube 12 , which is designed adjustable in height. The height adjustment takes place via a lifting device 13 in the embodiment shown consists of pulleys and ropes deflected thereto, which are adjustable in length by a winch, wherein the winch via a drive motor 20 is driven.

The height adjustable filling tube 12 is exactly to or on an inlet 15 put on a tanker, not shown.

In some cases, between the height-adjustable filling tube 12 and the inlet 15 be placed on the tanker an additional loading telescope.

On the chassis 3 Finally, the mobile unit is still an electrical connection 17 for the supply of the electrical elements and also a compressed air connection 18 intended.

About a control cabinet 16 The individual electrical functions of the various electrical devices are set.

The washing air for the air classifier 10 is powered by a fan 21 provided the washing air via a control flap 22 and a flexible connection 23 in the direction of the arrow 24 in the inlet 25 at the air classifier 10 blows.

The control flap 22 is adjusted so that the amount of air at the outlet is determined according to the optimum characteristic of the fan.

The polluted air polluted with dusts and filaments passes through the outlet 26 from the air classifier 10 blown out and leaves in the direction of arrow 28 the air sifter. In this section is a control valve 27 available. About the control valve 27 can still add fresh air into the pipe at the outlet 26 be introduced.

The polluted air passes through the waste air line 29 into the inlet side of a separator 30 , which is preferably designed as a highly efficient cyclone separator.

In the separator 30 a separation of the solid parts (threads and dusts) from the air flow of the waste air line 29 so that these parts over the outlet cone 31 and an elastic connection 33 in a dust drum 34 be initiated. The bottom of the outlet cone 31 is from a slider 32 completed if necessary.

The from the separator 30 cleaned air leaves the separator on its head side as a clean air line 35 in the direction of the arrow 36 and will have a flexible connection 39 on the suction side of a safety filter 37 guided.

The safety filter 37 serves to prevent any not yet deposited dusts and threads in the fan 21 reach.

So this is a marginal grain determination, which means that the safety filter 37 still contains certain, unseparated parts. Its filtering effect is achieved by a pressure gauge 38 checked.

At the exit of the safety filter 37 the air thus cleaned leaves the intake pipe 40 for the fan 21 holding the purified air in the direction of the arrow 41 sucks and blows back into the closed system.

The advantage of the entire system is that it works autonomously, ie without the need for external components. The carriage with the chassis 3 only needs an electrical connection 17 and a compressed air connection 18 , Otherwise, the entire system works without the aid of other components.

It is important that the device is operated autonomously, that is, that the air flow is guided in a closed circuit, whereby air losses are avoided and the air classifier 10 Immediately upon entry of the contaminated granulate at the inlet (in the direction of the arrow 44 ) can begin with the cleaning of the granules, without adjustment work are necessary, as in the EP 2 505 272 A1 be presupposed.

It does not require any elaborate adjustment work on the control valve 22 to the fan 21 To keep in its optimal operating point, because always the recirculated air on the once set control valve 22 with the same amount of air and the same pressure in the air classifier 10 what is happening at the moment EP 2 505 272 A1 was not the case.

LIST OF REFERENCE NUMBERS

1

base frame

2

platform

3

landing gear

4

Andockflansch

5

material inlet

6

telescopic tube

7

setting cylinders

8th

arrow

9

pusher

10

air classifier

11

Fluid bed unit

12

filling pipe

13

lifting device

14

arrow

15

Inlet (Tanker)

16

switch cabinet

17

electrical connection

18

Compressed air connection

19

winch

20

drive motor

21

fan

22

control flap

23

flexible connection

24

arrow

25

Inlet (from 10 )

26

Outlet (from 10 )

27

control valve

28

arrow

29

Dust air line

30

separators

31

outlet cone

32

pusher

33

elastic connection

34

dust drum

35

Clean air duct

36

arrow

37

safety filter

38

pressure gauge

39

flexible connection

40

suction

41

arrow

42

Spout (storage silo)

43

pusher

44

arrow

45

outlet

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2505272 A1 [0001, 0011, 0015, 0019, 0049, 0050]
• US 5035331 [0010]
• US 6595369 [0010]
• US7380670 [0010]
• US 7621975 [0010]

Claims (10)

Mobile classifier with one on a landing gear ( 3 ) ( 1 ) and a working platform ( 2 ), on which an air classifier ( 10 ) is arranged, the cleaning air from one on the base frame ( 1 ) arranged fan ( 21 ), to which a security filter ( 37 ), characterized in that also the separator ( 30 ) together with the downstream safety filter ( 37 ) on the chassis ( 3 ) are arranged. Mobile classifier according to claim 1, characterized in that the functional parts ( 10 . 11 . 21 . 22 . 30 . 37 ) on the chassis ( 3 ) form an autonomous unit. Mobile classifier according to claim 1 or 2, characterized in that the docking devices ( 5 . 15 ) for silo spout and tanker feed and connection ( 17 . 18 ) for electric current and compressed air on the chassis ( 3 ) are arranged. Mobile classifier according to one of claims 1 to 3, characterized in that a telescopic tube ( 6 ) according to the docking height to the outlet ( 42 ) of the storage silo is adjustable in height, one or more adjusting cylinders ( 7 ) are provided, which the telescopic tube ( 6 ) adjustable in length. Mobile sifter according to one of claims 1 to 4, characterized in that the cleaned granules the air classifier ( 10 ) via an outlet ( 45 ) leaves, whose filling tube 12 is height adjustable. Mobile sifter according to one of claims 1 to 5, characterized in that the washing air for the air classifier ( 10 ) from the fan ( 21 ) is supplied, the washing air via a control flap ( 22 ) into the inlet ( 25 ) on the air classifier ( 10 ). Mobile classifier according to one of claims 1 to 6, characterized in that at the output of the safety filter ( 37 ) the cleaned air into the suction line ( 40 ) for the fan ( 21 ), which draws in the cleaned air and injects it into the closed system. Method for operating a mobile classifier with one on a chassis ( 3 ) ( 1 ) and a working platform ( 2 ), on which an air classifier ( 10 ) is arranged, the cleaning air from one on the base frame ( 1 ) arranged fan ( 21 ), to which a security filter ( 37 ), characterized in that the system operates as a closed loop (closed loop). A method according to claim 8, characterized in that the from the fan ( 21 ) provided washing air after the separator ( 30 ) via a security filter ( 37 ) again the suction side of the air classifier ( 10 ) is supplied. Method according to claim 8 or 9, characterized in that the control flap ( 22 ) on the fan ( 21 ) is set so that always by setting the optimum characteristic curve of the fan ( 21 ) the amount of air at the inlet ( 25 ) of the air classifier ( 10 ) is determined.

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