DE102010009078A1 - Two-stage device for cleaning pasty and/or pourable contaminated material e.g. oil, or for drying material, has closable mobile container receiving and intermediately storing cleaned material through gravity feed chutes - Google Patents

Abstract

The device has a mobile container (10) provided in a gas-tight lockable manner for feeding a drying chamber (1) with a working material. An exhaust flange (11) of the container is domable adapted at intake connecting pieces (12) of the drying chamber and controlled based on predetermined functions defining transfer of the material between the container and the chamber. A closable mobile container (20) is attached to an outlet of a decontamination chamber (6) and receives and intermediately stores cleaned material through gravity feed chutes (7, 7').

Description

The invention relates to a device for cleaning contaminated materials of pasty and / or pourable consistency, in particular of oil, glycol or silicon-containing sludges and contaminated soils or for drying such materials, with at least one via an inlet port batch-feedable, heated and possibly on a vacuum source connectable drying chamber, which has a rotating driven mixing device and is connected to a condenser unit, and at least one on the drying chamber batch-feedable and a rotary driven mixing device having decontamination chamber, which is connected via its own condenser unit to a vacuum source, said drying chamber and decontamination over at least one chute with controllable gate valve are connected to each other.

Devices of this type are from the European Patent 0 896 838 B1 as well as the DE 10 2008 006 719 A1 known. These devices, which are based on the Applicant, and the methods realized by means of these devices have proven themselves in practical use, in particular in connection with the cleaning of contaminated soils as well as other contaminated materials.

Particular care should be taken when handling or processing contaminated materials that contain contaminants in the form of volatile components that may cause deflagration and possibly even explosions. These dangers are mainly due to the fact that it is not always known in the case of materials supplied for processing or treatment that such components are present to a degree causing danger. Furthermore, in the processing of, for example, oil-, glycol- or silicon-containing sludges, it is disadvantageous in practice that time-consuming precautionary measures and, in particular, temperature reductions in the form of cooling processes in drying chambers have to be accepted in order to avoid the risk of deflagration and explosion.

Object of the present invention is to provide the device mentioned above in such a way that it makes it possible to safely treat even those materials in an economical manner or process, the previously known or unknown or at least to the extent of the presence of unknown substances containing At elevated temperatures, in particular at temperatures above the evaporation temperature of water, deflagrations and / or explosions in the drying container may result.

This object is achieved according to the invention essentially in that is provided for feeding the drying chamber with material to be machined at least one substantially gastight closable, mobile container, that the container is provided on the bottom side with an outlet, which is adapted to the inlet port of the drying chamber and can be coupled with this gas-tight and is provided in the coupled nozzle with a shut-off, which is controllable depending on predetermined material transfer criteria between the container and drying chamber, and / or each preferably a preferably at least substantially closed trained mobile container associated with the outlet of the decontamination chamber and Recording and intermediate storage of a via a chute in the container convertible hot batch of purified material is formed.

While in the prior art, the supply of processed contaminated material to the drying chamber via conveyor belts and the drying chamber was due to the previous treatment operations in batch operation was already at an elevated temperature and accordingly had to be cooled to avoid hazards due to possible deflagration in the necessary manner, it is possible by the invention, the material from the closed mobile container under a protective gas atmosphere in the likewise under inert gas atmosphere drying chamber to transfer safely, even if the drying chamber at elevated temperature, for. B. in the range of about 150 ° C, is located. This represents a very significant advantage in terms of function and economy, since even with critical materials any risk of explosion and deflagration is excluded and yet the entire system can be operated in optimal batch operation.

Above all, the invention also makes possible the treatment of contaminated materials, in which the recovery of valuable substances is of great importance. This applies in particular to silicon-containing sludges, but also to oil-containing or glycol-containing metallic grinding and drilling sludges.

Preferably, the containers provided for charging and for receiving the respectively cleaned batch are at least substantially identical, so that they can be used for both purposes. Such containers are accordingly equipped with corresponding inlet and outlet nozzles and the respective required slide or bottom flap arrangements.

In order to be able to carry out a material transfer from the mobile container to the drying chamber in a perfect protective gas atmosphere, the shut-off device is preferably formed by slide arrangements provided both in the outlet connection of the container and in the inlet connection of the drying chamber.

The mobile container has, in particular, a lockable connection for supplying inert gas, in particular nitrogen, and a lockable outlet opening for gases to be displaced out of the container, wherein the outlet opening is preferably provided with a sensor for determining the inert gas portion of the outflowing gas. This makes it possible to supply inert gas to the container until only inert gas is detected by the sensor in the outlet opening, so that complete filling of the free space in the container with inert gas can be ensured.

In order to avoid overpressure or underpressure in the respective unit to be filled or emptied, is between the pressure chamber 1 and the mobile container a gas shuttle line 21 provided in which expediently a shut-off valve is arranged. Appropriate gas displacement lines can also be used between drying chamber and decontamination chamber and the mobile container for receiving the purified material, but since there is no inert gas atmosphere in these areas, to avoid the emergence of overpressures or negative pressure in the atmosphere opening filters 22 Find use.

Conveniently, the mobile container is provided with bottom walls inclined toward the connecting piece and connected or detachable with a vibrating device which promotes the material discharge, so that the transfer of the material into the drying chamber proceeds smoothly and quickly. In the case of using a vibrating device is provided that the connection piece of the mobile container is equipped with a flexible, vibration decoupling area.

The particular intended for filling the drying chamber mobile container is preferably by means of an integrated lifting and positioning or a crane system between a ground station and a material transfer station above the drying chamber movable.

According to a further variant of the invention, either independently of the feed side used mobile containers or in combination with it, a further mobile container can be assigned to the outlet side of the respective decontamination chamber. Such, preferably also closed, and initially provided with a supply container is filled with the cleaned, hot material from the decontamination chamber and can then be transferred to a cooling position. In contrast to the usual prior art emptying of the decontamination chamber with simultaneous humidification of the still hot material according to the invention now the hot material can be introduced without moistening in the container and cool in the container. The cooled material can then be moistened during the further processing during discharge or after discharge from the container and reused, so that the previously disturbing evaporation and evaporation processes during discharge of the hot, cleaned material can be avoided.

An embodiment of the invention will be explained below with reference to the drawing.

The single FIGURE of the drawing shows in a highly schematic manner a two-stage, operating in batch mode for cleaning decontaminated materials, the loading of the drying chamber via a mobile container and the emptying of the decontamination chamber also via a mobile, preferably substantially identical container.

Regarding the basic operation of the drying chamber 1 and decontamination chamber 6 existing device will be on the DE 10 2008 006 719 A1 referred, so that in the context of the following description of the embodiment, details of the device and the method realized in the device need not be discussed in more detail, because these details are already explained in detail in the above-mentioned document and apply to the extent of the subject of the invention.

The drawing shows the stationary arranged drying chamber 1 and those below this drying chamber 1 also stationary positioned decontamination chamber 6 , both chambers via a chute 7 with input-side bottom flap 8th and isolation gate 9 can be connected to each other. Both in the drying chamber 1 as well as in the decontamination chamber 6 is a mixing device 2 . 2 ' provided by drive motors 3 . 3 ' be set in rotation.

drying chamber 1 and decontamination chamber 6 are heated, in particular via corresponding thermal oil feeds opening into shell spaces 4 . 4 ' and thermal oil drains 5 . 5 ' ,

The provided in both chambers connections to vacuum sources and Capacitor units are not shown here for reasons of simplification.

For feeding the drying chamber 1 are mobile containers according to the invention 10 provided by means of suitable transport or lifting device in a loading position above the drying chamber 1 can be brought, so that the material transfer from the container 10 in the drying chamber 2 by gravity, possibly supported by Rüttelvorgänge, can take place.

The mobile container 10 is by means of a suitable cover assembly 14 and provided seals substantially gas-tight closable, wherein a bottom side provided outlet 11 via a controllable bottom flap and / or a separating slide 17 is closed.

In this way, the filled container 10 via an inert gas inlet 15 be completely filled with inert gas, wherein the displaced from the interior of the gas via a corresponding outlet 16 can flow out. Preference is given to the outlet 16 a sensor provided, so that the time can be determined, to exit from the outlet practically only inert gas and thus ensures that the container 10 completely under inert gas.

Conveniently, the container bottom is designed so that due to oblique walls, the emptying by gravity is easily going on. If necessary, the container 10 be equipped with a vibrating device or coupled with such a vibrating device to accelerate the discharge process. In this case is between outlet 11 and containers 10 preferably a flexible section 13 provided so that the shaking movements the coupled areas of container 10 and drying chamber 1 do not interfere.

The coupling between outlet nozzle 11 of the container 10 and inlet pipe 12 the drying chamber 1 is preferably via a seal 18 designed gas-tight. Also the inlet port of the drying chamber 1 is with a gate valve 19 fitted.

The over the chute 7 with the drying chamber 1 related decontamination chamber 6 has an outlet chute 7 ' in which a controllable graduation flap 8th' as well as a separating slide 9 ' are arranged.

To help in the transfer of the material from the mobile container 10 in the closed drying chamber 1 a pressure build-up in the drying chamber 1 and a buildup of negative pressure in the mobile container 10 To avoid, is between these two units each connectable gas return line 21 provided, in which a controllable or actuatable shut-off valve can be arranged.

A corresponding gas displacement line can also be used between drying chamber 1 and decontamination chamber 6 or between decontamination chamber 6 and a mobile container 20 be provided for purified material, but since it is not working in these areas with inert gas, a positive pressure build-up or the emergence of negative pressure can also be avoided by the corresponding interiors via a filter 22 that prevents the escape of dust associated with the atmosphere.

After final cleaning of the material can this over the chute 7 ' in hot condition a mobile container 20 be fed, which may be designed as an open or closed container. When transferring the material into the container 20 There is no humidification of the material, so that no vapor development occurs. The container 20 may be stored at a suitable location until the material cools, whereupon reuse of the material at an appropriate time is possible and the material removed from the container may be moistened as required.

By means of the device described, it is possible, the material to be processed from the container 10 safely transferred into the still-hot drying chamber, which may for example have a temperature of about 150 °, to convict, since the material is not exposed in any phase atmospheric air, but rather in the container 10 already in an inert gas atmosphere and this inert gas atmosphere in the same way in the drying chamber 1 and is maintained in the connection shaft. The risk of deflagration or explosions is thus completely eliminated, ie it can also be extremely critical materials processed or processed.

After the transfer of the material under an inert gas atmosphere into the drying chamber 1 can this drying chamber 1 be closed again, whereupon the drying process and the under heating and possibly successful application of vacuum can be performed. The container 10 is ready to be refilled again for a new filling.

LIST OF REFERENCE NUMBERS

1

drying chamber

2, 2 '

mixing device

3, 3 '

drive motor

4, 4 '

Thermal oil supply

5, 5 '

Thermal oil drain

6

decontamination chamber

7, 7 '

chute

8, 8 '

bottom flap

9, 9 '

separating slide

10

mobile container

11

Outlet container

12

Inlet pipe drying chamber

13

Flexible section

14

cover

15

inert gas inlet

16

inert gas head outlet

17

Bottom flap / slide

18

poetry

19

separating slide

20

mobile container for cleaned material

21

Gas displacement line

22

filter

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 0896838 B1 [0002]
• DE 102008006719 A1 [0002, 0017]

Claims (10)

Device for cleaning contaminated materials of pasty and / or pourable consistency, in particular of sludges containing oil, glycol or silicon, and polluted soils or for drying such materials, with at least one via an inlet connection ( 12 ) Batch-feedable, heated and optionally connectable to a vacuum source drying chamber ( 1 ) comprising a rotating mixing device ( 2 ) and is connected to a condenser unit, and at least one of the drying chamber ( 1 ) batch-loading and a rotary driven mixing device ( 2 ' ) having decontamination chamber ( 6 ), which is connected via its own capacitor unit to a vacuum source, wherein drying chamber ( 1 ) and decontamination chamber ( 6 ) via at least one chute ( 7 ) with controllable separating slide ( 9 ), characterized in that for charging the drying chamber ( 1 ) with material to be processed, at least one substantially gas-tight, closable, mobile container ( 10 ) it is provided that the container ( 10 ) on the bottom side with an outlet ( 11 ) provided at the inlet port ( 12 ) the drying chamber ( 1 ) and can be coupled with this in a gas-tight manner and in the region of the coupled connecting pieces ( 11 . 12 ) with a shut-off device ( 17 ), which depends on predeterminable material transfer criteria between containers ( 10 ) and drying chamber ( 1 ) is controllable, and / or in each case a preferably at least substantially closed trained mobile container ( 20 ) the outlet of the decontamination chamber ( 6 ) is assigned and for receiving and temporary storage of a via a chute into the container convertible hot batch of cleaned material is formed. Apparatus according to claim 1, characterized in that the shut-off device ( 17 ) of both in the outlet ( 11 ) of the container ( 10 ) as well as in the inlet nozzle ( 12 ) the drying chamber ( 1 ) provided slide assemblies is formed. Device according to claim 1, characterized in that the mobile container ( 10 ) a lockable port for supplying inert gas, in particular nitrogen, and an outlet port for out of the container ( 10 ) has to be displaced gases. Apparatus according to claim 1, characterized in that the outlet opening ( 16 ) at the container ( 10 ) is associated with a sensor for determining the inert gas content of the outflowing gas. Apparatus according to claim 4, characterized in that the duration of the inert gas supply is controlled in dependence on the inert gas sensor. Device according to one of the preceding claims, characterized in that the shut-off device ( 17 ) between mobile container ( 10 ) and drying chamber ( 1 ) depending on the complete filling of the mobile container ( 10 ) and the drying chamber ( 1 ) is controlled with inert gas. Device according to one of the preceding claims, characterized in that a lifting device, in particular a crane for the mobile container ( 10 ) is provided. Device according to claim 1, characterized in that the mobile container ( 10 ) with the outlet ( 11 ) inclined towards bottom walls and connected to a material discharge promoting vibratory device or can be coupled. Device according to one of the preceding claims, characterized in that the mobile container ( 10 ) by means of an integrated lifting and positioning system between a delivery station and the container ( 10 ) located material transfer station is movable. Apparatus according to claim 8, characterized in that the outlet ( 11 ) of the mobile container ( 10 ) with the container ( 10 ) via a flexible, vibration-decoupling acting area ( 13 ) connected is.

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