DE19506986A1 - Mobile filtering tank for pressure regulation of loading or unloading - Google Patents

Abstract

The tank (1) has: (a) a filling connection, in the first (1.3) of two regions; and (b) an outlet from the second (1.4).These two columns are divided by a sieve. Fittings (1.2; 9) are used to control the internal pressure. The filter construction, all in the second volume, includes the filter medium (7) with a defined grain size, and a coarse filter medium (5.3) around the drainage tube (5), leading to the outlet connection (1.6). In addition to the appts described above, the method of use is also claimed.

Description

The present invention relates to a mobile de-fluidizing device a container in which a closable filtrate removal opening is provided is and its interior by a screen element in a first and one second chamber area is divided, with in the first chamber area Feed port and a drain port in the second chamber area is trained.

The present invention also relates to a method for mobile De-fluidization according to the preamble of claim 11.

Such a device or device is from the general prior art such a method, for example for dewatering sludge or the like. known. In this case, a sieve tray is arranged in a container. The container has a loading opening above the sieve bottom, through which the sludge is introduced into the container. Store the solids due to gravity on the sieve bottom and the liquid portion of the sludge runs through the sieve openings of the sieve bottom and is over an outlet opening below the sieve bottom discharged from the container. After reaching a certain degree of drainage, the container opened to the sediment deposited on the sieve bottom, the so-called Remove the filtrate and dispose of it.

With the known dewatering device, the sludge can be up to be drained to a certain extent, but the water to be drained is unfiltered and can therefore with polluting pollutants from the Exit the container.

The object of the present invention is therefore a mobile To create a de-fluidizing device from which a fluid is largely without environmentally harmful pollutants is released and at the same time on simple Way is inexpensive to manufacture.

The object is achieved in that in the second chamber area Filter medium is formed, and that in the filter medium with the Drain connection connected drainage element is arranged.  

Another object of the present invention is to provide a method for to create mobile de-fluidization, in which the fluid to be discharged in is essentially free of polluting pollutants and that on simple Way is inexpensive to perform.

The object is achieved in that the second chamber area with a Filter medium is filled so that one connected to the drain port Drainage element is embedded in the filter medium, and that in the first Chamber area of the closed container, the material to be de-fluidized is initiated via the feed connection.

The mobile de-fluidizing device has the advantage that this is due to the Sieve tray z. B. running water from a water to be dewatered Mud must seep through a filter medium before it passes over a Drainage is drained from the container. On the way between the sieve plate and drainage remain the (harmful) contained in the water to be drained Substances in the filter medium.

According to claim 2, another advantage is that the container at least has a connection for pressure control. This enables the Improve the degree of drainage of the sediment lying on the sieve bottom, by draining the water from the sediment through a suitable one Pressure control in the container interior is supported. So z. B. the Container interior can be evacuated to then vacuum the sludge suck in and then break the vacuum by the Container interior is ventilated. This process can according to claim 13 can be repeated several times. By using a pressure control the process of de-fluidization is also accelerated.

In the event that the filter medium is made of loose material that the Drainage element could be removed, it is according to claim 3 of Advantage that between the filter medium and the drainage element Coarse filter medium is arranged. This prevents the coarse filter medium Rinse the leaked filter medium in the direction of the drain connection.

Another advantage is according to claim 4 that the filter medium has defined grain size. This allows the filter medium to  its permeability to the liquid to be filtered and that in the liquid expected pollutants are adjusted.

It is advantageous if, according to claim 5, the filter medium is a chemical and / or physical affinity for the material to be de-fluidized has, since then the filter medium advantageously an identical or at least a similar binding property to the substances to be filtered has, such as the material to be de-fluidized. The filter properties will thereby improved. Another important advantage is that the De-fluidized material is recycled together with the filtrate can be and does not have to be disposed of separately as special waste.

Two embodiments of the present invention are as follows described in more detail with reference to the drawings. Show it:

Figure 1 is a schematic representation in cross section through the container of a mobile de-fluidizing device, in a first embodiment of the present invention.

Fig. 2 is a schematic representation in cross section through a container according to a second embodiment of the present invention;

Fig. 3 is a schematic representation in longitudinal section of the container of FIG. 2;

Fig. 4 is a schematic representation in an enlarged view of the drainage element and its immediate surroundings.

Fig. 1 shows a schematic representation in cross-section an embodiment of the present invention. A container 1 is approximately cylindrical in shape and is arranged in a functional manner. At one end of the container 1 , a filtrate removal opening is provided which can be closed tightly with a closure flap 1.1 (see FIG. 3). The interior of the container is accessible via the filtrate removal opening, which means that not only can the filtrate be removed via the filtrate removal opening, but the interior of the container can also be cleaned. In the wall of the container 1 , a ventilation device 1.2 is arranged for pressure control of the container interior. A first chamber region 1.3 and a second chamber region 1.4 are formed in the container 1 . The first chamber area 1.3 is spatially above the second chamber area 1.4 and has a feed connection 2 . An angular baffle plate 2.1 is arranged below the feed connection 2 , by means of which a uniform distribution of the sucked-in sludge in the container is ensured. The second chamber area 1.4 is located in the vicinity of a container bottom 1.5 , in which a drain connection 1.6 ( FIG. 3) is also formed, and is spatially separated from the first chamber area 1.3 by a sieve element 3 . The sieve element 3 has a number of sieve openings (not shown), the number, size and arrangement of which can be freely selected depending on the substance to be de-fluidized.

In the first embodiment, the sieve element 3 has an approximately flat surface and extends over the entire length of the interior of the container. On a long side 3.1 , the sieve element 3 is articulated on the inner wall of the container 1 , so that it can be pivoted away from the container base 1.5 with the free side 3.2 about a longitudinal axis from a working position.

A drainage element 5 , which extends in the longitudinal direction over substantially the entire interior of the container, is arranged below the sieve element 3 , that is to say in the second chamber region 1.4 , in the region of the lowest point of the container base 1.5 . The drainage element 5 is hollow-cylindrical and has a plurality of inlet openings 5.1 in its circumference (see FIG. 4). A fluid can penetrate into the drainage element 5 through the inlet opening 5.1 . The drainage element 5 is connected to the drain connection 1.6 , so that the fluid entering the drainage element 5 can run out of the container 1 via the drain connection 1.6 .

The drainage element 5 is, for. B. made of PVC, PE, steel or stainless steel. On the outside is the drainage element 5 with a fibrous material 5.2 , such as. B. coconut fiber mats. The fibrous material 5.2 serves as a coarse filter medium and prevents granular material from entering the drainage element 5 through the inlet openings 5.1 . The drainage element 5 is embedded in a filter medium 7 , so that the drainage element 5 is surrounded laterally and above by the filter medium 7 . The filter medium 7 preferably consists of a material or material mixture with a defined grain size, such as. B. from pure sand, slag or coke and fills the second chamber area 1.4 between sieve element 3 and container bottom 1.5 at least partially, but preferably completely. The material of the drainage element 5 is adapted to the filter medium 7 .

Parallel to the drainage element 5 , at a radial distance from it, pressure medium lines 9 are provided, which are connected to the ventilation device 1.2 . The pressure medium lines 9 can also be provided above the sieve element 3 , either in the lower region of a sediment or welded onto the sieve element 3 .

Before a de-fluidization process or a drainage process closer will first be explained, a second embodiment of the present Invention described.

In FIG. 2, a second embodiment of the present invention is shown in schematic representation in cross-section. In Fig. 2, all components that correspond to those from the first embodiment or have the same function as these are provided with the same reference numerals.

In the second embodiment, too, a container 1 is divided into two chamber regions 1.3 and 1.4 by a sieve element 3 . In contrast to the first embodiment, the sieve element 3 is not designed as a flat surface, but its shape is adapted to the curvature of the container bottom 1.5 . The screening element 3 runs largely parallel to the inner wall of the container and extends into the vicinity of a central axis of the container. By adapting the sieve element 3 to the curvature of the inner wall of the container, the sieve area can be significantly increased compared to that of the sieve element 3 of the first embodiment. In the second embodiment, the sieve element 3 is no longer pivotably mounted on the inner wall of the container 1 , but instead has a roller device 11 with which it is supported on the container base 1.4 . The sieve element 3 can be rolled out of the interior of the container through the filtrate removal opening (not shown). This makes cleaning the interior of the container much easier. It is also possible, depending on the application conditions, to replace sieve elements 3 in the container 1 . The other devices and configurations are identical to those of the first embodiment and are therefore not described again for the second embodiment.

A de-fluidization process using the example of dewatering a sludge is described below.

The interior of the container 1 is evacuated, so that a negative pressure prevails in the container chambers 1.3 and 1.5 . The sludge to be dewatered is introduced into the first container chamber 1.3 via a feed connection (not shown). After the introduction process is completed, the interior of the container is ventilated via the ventilation device 1.2 and the vacuum is thereby broken. Through such a pressure control, which can be repeated several times, the liquid from the solid / liquid mixture is pressed through the sieve element 3 , the filter medium 7 (sand with a defined grain size) and the coconut fiber mat 5.2 via the inlet openings 5.1 into the drainage pipe 5 and via the outlet connection 1.6 derived from the container 1 . When the liquid is pressed out of the sludge to be dewatered, the liquid entrains (harmful) substances contained in the sludge, which are retained in the filter media 7 and 5.2 . A very good filter effect is achieved if the nature of the filter medium has a chemical and / or physical affinity for the sludge solid to be dewatered.

By squeezing the liquid out of the sludge, the surface of the sludge quickly solidifies, so that surface water can no longer penetrate into the sediment and reach the drainage pipe 5 through the sieve element 3 and the filter media 7 and 5.2 . For this reason, the pressure medium lines 9 are provided in the second chamber area 1.4 , which are connected to the ventilation device 1.2 , but preferably with a separate pressure medium supply, and via which pressure medium can be introduced into the container interior if necessary. As a result, fine cracks can be blasted into the sediment from below, through which the surface water can then drain downwards.

A third cleaning stage (not shown) can be arranged downstream of the filter medium 7 and the coarse filter medium 5.2 in the area of the drain connection 1.6 in the direction of the de-fluidization. This cleaning stage can either inside the second chamber area 1.4 or outside the container 1 , for. B. in a drain hose (not shown). In the latter case, the use of a cartridge with a filter medium, such as. B. activated carbon, conceivable that can be replaced easily and quickly depending on need and consumption.

Claims (14)

1. Mobile de-fluidizing device with a container in which a closable filtrate removal opening is provided and the interior of which is divided by a sieve element into a first and a second chamber area, a feed connection being formed in the first chamber area and an outlet connection being formed in the second chamber area, characterized in that in that a filter medium (7) is formed in the second chamber portion (1.4), and that connected to the outlet connection (1.6) drainage element (5) is arranged in the filter medium (7). 2. Mobile de-fluidizing device according to claim 1, characterized in that in the container ( 1 ) at least one pressure medium device ( 1.2 ; 9 ) is designed for pressure control. 3. Mobile de-fluidizing device according to claim 1 or 2, characterized in that a coarse filter medium ( 5.2 ) is arranged between the filter medium ( 7 ) and the drainage element ( 5 ). 4. Mobile de-fluidizing device according to one of claims 1-3, characterized in that the filter medium ( 7 ) has a defined grain size. 5. Mobile de-fluidizing device according to one of the preceding claims, characterized in that the filter medium ( 7 ) has a chemical and / or physical affinity for the material to be de-fluidized. 6. Mobile de-fluidizing device according to one of claims 3-5, characterized in that the coarse filter medium ( 5.2 ) is fibrous. 7. Mobile de-fluidizing device according to one of the preceding claims, characterized in that the sieve element ( 3 ) is adapted to the shape of an inner wall of the second chamber region ( 1.4 ). 8. Mobile de-fluidizing device according to one of the preceding claims, characterized in that the screen element ( 3 ) in the second chamber region ( 1.4 ) is supported on a roller device ( 11 ). 9. Mobile de-fluidizing device according to one of claims 1-7, characterized in that the sieve element ( 3 ) on an inner wall of the container ( 1 ) is pivotally fixed. 10. Mobile de-fluidization device according to one of claims 2-9, characterized in that a pressure medium connection ( 1.2 ) in the first chamber area ( 1.3 ) and at least one pressure medium line ( 9 ) is arranged in the second chamber area ( 1.4 ). 11. Method for mobile de-fluidization of a material in a container with a first chamber area separated from one another by a sieve element and second chamber area, with a feed port in the first Container chamber and a drain port in the second chamber area and with a closable filtrate removal opening, characterized, that the second chamber area is filled with a filter medium, so that a drainage element connected to the drain connection in the Filter medium is embedded, and that in the first chamber area of the closed container the material to be de-fluidized over the Feed connection is initiated. 12. The method according to claim 11, characterized,  that before the introduction of the material to be de-fluidized in the first and second chamber area creates a negative pressure that is to be de-fluidized Material is introduced into the first chamber area by the negative pressure, and that after a predetermined period of time after initiation into the first and an ambient pressure is set again in the second chamber region. 13. The method according to claim 12, characterized, that the process is repeated several times according to claim 12. 14. The method according to any one of claims 11-13, characterized, that before filling the second chamber area with the filter medium Drainage element is coated with a coarse filter medium.