EP3015162A1 - Method and conveyor device for removing a liquid substance mixture from a container - Google Patents

Abstract

Method and device for removing a liquid substance mixture from a container (4) via a removal unit (3), wherein the substance mixture before and / or during a removal process by means of a gas line (26) assigned to the extraction unit (3) in the mixture gaseous Media stream is mixed, wherein the removal unit (3) is associated with a pump unit (2) with a feed pump (22), preferably a metering pump, via which the mixture is removed by means of a protruding into the mixture suction line (31).

Description

The present invention relates to a method and a conveying device for removing a liquid substance mixture from a container via a removal unit, wherein the mixture is mixed before and / or during a removal operation by means of a gaseous media stream introduced into the substance mixture via a gas line assigned to the removal unit.

Such methods and conveyors are already known from the prior art.

From the DE 440 800 A goes in this context, the use of two mammoth pumps, which are completely immersed in the mixture to be mixed and the associated container are assigned. One of these mammoth pumps is used for mixing compressed air, while the other is provided for removing the mixture of substances from the container. Next shows the DE 25 53 824 A1 a downpipe device, in which, however, a mixing of the mixture takes place only in the target container, so not when sucking, but rather when blowing out the previously funded mixture.

In the context of this patent application, a particular focus will be placed on the specific application of a metered addition of disinfectant in the swimming pool water of a swimming pool. For this purpose, the prior art also already knows some solutions, with the help of which a metered addition of a calcium hypochlorite solution into the swimming pool water takes place. The same applies to the disinfection of drinking water. In principle, however, a wide variety of tasks are to be accomplished with the invention described below, regardless of the subject-matter described above.

First, a solution of the company Evoqua is known, in which an interchangeable with calcium hypochlorite granules is kept. In this container, which has a predetermined granule level, water is supplied via a Lösungsbereiter, which mixes with the granules. With a connected to an adapter of the solution maker hose pump then a removal of the resulting Calciumhypochloritlösungdurch.Mit the Lösungsbereiter a more or less uniform solution is achieved, it being noted that initially an oversupply of granules is present, which at the first moment with the supplied Water will react. Furthermore, bicameral systems are also known in which the solution prepared by supplying water and calcium hypochlorite is immediately removed and stored in a second collecting container in order to be removed and metered from there. The insoluble constituents remain in the first chamber.

Other methods for mixing granules with water are also known, for example, to align a container so that it is overhead passing stream of water dissolves the falling granules in Vorbeispülen and thus entrains the einzumischenden particles. The prepared solution is then metered in via injectors.

Another solution, described in the technical regulations of the swimming pool industry, would be to introduce an additional stirrer into a permanently installed container, which allows a constant mixing of the solution of solvent and granules. Although this reduces the effort compared to the aforementioned solutions, but means that the insoluble constituents are difficult to remove and the filling with granules must be carried out under additional expenses for occupational safety. This should be minimized in the context of the present invention.

Against this background, the present invention, the object of the invention to provide a method and a conveyor for removing a liquid mixture from a container, which can provide a precisely metered solution with little effort waiving additional agitators whose mixing is always uniform and which can also be applied to delivery containers.

This is achieved by a method for taking a liquid mixture from a container according to the features of claim 1, and by a conveyor for removing a liquid mixture from a container according to the features of the independent claim 9. Further, useful embodiments of the method and the conveyor can be taken from the respective subclaims below.

According to the invention, as part of a process for removing a liquid substance mixture from a container, this container is initially filled with a defined amount of granules and then applied to it with an appropriate amount of solvent. This ensures that the mixing ratio of solvent and granules to each other is appropriate and thus the concentration of the solution produced exactly meets the specifications. As such container, a delivery container can be used with a predefined amount of granules. As a result, a transfer of the granules is not required and skin contact of employees with the granules can be effectively avoided, so that associated dangers that persist in the prior art, are eliminated.

To ensure that such a solution does not separate again over time, it is provided to introduce a gaseous media stream, for example an air stream, into the substance mixture before and / or during a removal process and to stir up the mixture of substances by means of the introduced gas and mix it with it , For this purpose, it is only necessary that the container has a possibility for supplying a gas line through which the gas used can be introduced into the mixture. In this way, a mixing without stationary container with additional stirrers, which also represent additional wear parts, possible, so that you can work very wear-optimized in this way.

The removal of the substance mixture from the container takes place via a removal unit, which essentially initially comprises a suction line, via which the solution is removed by means of suitable conveying devices. This extraction unit can be assigned directly to an additional gas line, via which the gas is introduced. This has the advantage that in the vicinity of the mouth of the suction line and the gas stream can be discharged, so that at the mouth of the suction line a particularly good mixing without solids content is ensured due to the spatial proximity to the fluidizing gas.

With further advantage, the removal of the substance mixture can take place via a pump unit which is connected to the removal unit. In this case, the pump unit has a delivery pump, for example a metering pump which is sucked out of the substance mixture taken from the container and forwarded to a receiver system or this is metered.

The suction line of such a removal unit may further have in the region of its free end, that is, the end projecting furthest into the container, an arcuate mouth portion, which ensures that the mouth of the suction line facing away from the ground. Here, the mouth also takes some distance from the ground, so that not the substance mixture is sucked directly from the bottom of the container, but from a layer immediately above it. This has the advantage that particles settling in the bottom area, in addition to undissolved constituents, can also be gypsum when calcium hypochlorite is used. An ensuing sediment is left behind in an otherwise complete emptying of the container and passed with the container for disposal or reprocessing.

In addition to the feed pump for sucking off the substance mixture from the container, the pump unit can also be assigned an additional gas pump via which the gas pump is supplied with the gaseous media flow intended for mixing the substance mixture. In this case, if necessary, the gas pump may be connected to a gas container, or in the case of the use of ambient air by means of an intake with this be supplied. In particular, when using outside air, it is possible without problems to operate the gas pump continuously, so that the best possible mixing is guaranteed at any time. Even with a longer shutdown of dosing can then be resorted to a uniformly mixed solution.

The actual removal process can ideally be preceded on site by an initial filling process, in which a delivery container is used as a container which is filled with a predetermined amount of granules. In this case, not a withdrawal unit, but rather a filling unit will be used connected to the container, wherein via this filling unit, a supplied second material can be added to the first substance already in the container. In the case of calcium hypochlorite granules, this would be normal water in the present case of disinfecting swimming pool water. At a first contact of water with the previously dry granules, this reacts at first, so that chlorine fumes are formed. After adding a predetermined amount of the second material, in this case the water, therefore, a short reaction time is awaited and finally the filling unit is exchanged for the removal unit and can be started immediately with the removal process described above.

The filling unit can advantageously have a T-shaped pipe section from which a container connection is connected to the container. Opposite the container connection is a gas outlet, via which the resulting reaction gases are removed from the container and neutralized. About the third, remaining connection, which serves as a feed connection for the second substance, in this case water, the filling of the container takes place. By way of the container connection, therefore, the second substance entering via the feed connection flows into the container and at the same time also discharges the escaping reaction gas. Since the reaction gas will be chlorine-containing air and in other cases may also be hazardous gases, the gas outlet of the T-shaped pipe section may be associated with an activated carbon filter which first passes through the exiting gas and is thereby neutralized.

As can already be seen from the description of the method, a delivery rate according to the invention for withdrawing a liquid substance mixture from a container essentially consists of a pump unit comprising a delivery pump and a gas pump. In this case, in this preferred configuration, the feed pump and the gas pump can be arranged uniformly in a pump housing. The feed pump is in this case connected on the one hand via a suction connection with the extraction unit, via a pressure connection with the arrangement to be fed, in the present example with a pipe system for the swimming and pool water. The gas pump, however, is connected to the gas line of the extraction unit and promotes gas into it, which swirls the substance mixture in the region of the outlet of the gas line.

Feed pump and gas pump can be controlled independently of each other, so that the gas pump, for example, can run continuously and ensure a constant uniform mixing, while the feed pump is switched on as needed.

To simplify handling, suction line and gas line can be combined in the removal unit, in particular also be enclosed by a common outer jacket, so that the removal unit can be arranged in the container simply and with little effort.

The suction line may further comprise at its free end an arc portion, wherein the inlet direction into the mouth of the suction line with the remaining course of the suction line forms an angle of more than 90 °. This ensures that the mouth is placed a certain distance from the bottom of the container, so that a forming sediment from the suction line can not be sucked. About precipitating gypsum and the like is not introduced by the swimming and pool water or in the system to be fed.

In order to ensure a further improvement of the mixing, the gas line can be assigned suitable guide elements, via which the outlet direction of the gas can be predetermined from the gas line or can also be changed over time in the case of a rotatable outlet unit.

The invention described above will be explained in more detail below with reference to an embodiment.

Figur 1

eine schematische Darstellung der Gesamtkonfiguration einer Zudosierung von Desinfektionsmittel in ein Schwimmbad,

Figur 2

eine perspektivische Querschnittsdarstellung einer Pumpeneinheit von schräg oben, sowie

Figur 3

eine seitliche Querschnittsdarstellung einer Entnahmeeinheit mit einer Saugleitung mit Bogenabschnitt und wenigstens einer Gasleitung.

Show it

FIG. 1

a schematic representation of the overall configuration of a dosage of disinfectant in a swimming pool,

FIG. 2

a perspective cross-sectional view of a pump unit obliquely from above, as well

FIG. 3

a lateral cross-sectional view of a removal unit with a suction line with arc section and at least one gas line.

FIG. 1 shows a conveyor 1, with which from a container 4, a disinfecting solution can be introduced into a pipe system 5 of a swimming pool. For this purpose, first a container 4 is supplied with granules of calcium hypochlorite and filled in the context of a filling with a certain amount of water. After a reaction time, a removal unit 3 is introduced into the container 4, which is connected to a pump unit 2. The pump unit 2 comprises a feed pump 22 for removing the solution contained in the container 4 and forwarding it to the pipe system 5. The forwarding takes place via an injection point 6, which is preferably carried out self-cleaning and thus deposits in the region of the outlet opening can be avoided. Characterized in that a closed container with a fixed amount of granules and a suitable amount of solvent, in this case water, is used, there is always an exact ratio of water and calcium hypochlorite present in the dosed solution, so that a precise metering is possible. An emptied after several Befüllvorgängen delivery container is first freed from the removal unit 3 and then replaced with another container, which initially premixed as part of a filling and then provided again with the removal unit.

To ensure that a uniformly mixed solution is always available, the pump unit 2 will introduce gas into the container 4 via a second line of the extraction unit 3, which gas is introduced into the mixture of substances therein. This is thereby swirled, which leads to a uniform mixing. A gas pump 25 provided for this purpose in the pump unit 2 draws in external air and pumps it via a gas line 26 into the container 4. The container 4 or the removal unit 3 are not gas-tight and in this case offer a possibility for the escape of the introduced gas.

FIG. 2 shows the just-discussed pump unit 2 in a cross-sectional view, it being noted that the pump unit 2 in a common pump housing 20, a gas pump 25 and a feed pump 22 includes. The feed pump 22 has a suction connection 23 to be connected to the removal unit, and a pressure connection 24 to be connected to the pipe system 5. The feed pump 22 is controlled by the controller 21, whereby the gas pump 25 can also be controlled via this. The gas pump 25 is generally operated continuously by means of the controller 21, so that a continuous mixing of the mixture present in the container 4 is ensured. The gas pump 25 will have for introducing the gas into the mixture an intake manifold for outside air, which is not shown here. Via the gas line 26, the gas pump 25 supplies the removal unit 3 and thus the container 4 with a gaseous media flow from outside air.

FIG. 3 shows the to be connected to the pump unit 2 removal unit 3, which has a first container lid 30 to the completion of the container 4. This comprises at least one gas outlet opening, not shown here, through which gas introduced into the container can escape.

By container cover 30 a plurality of lines are guided so that they can be connected from the outside. This is at least a suction line 31 and a gas line 32. Via the gas line 32, the outside air is introduced into the container 4, wherein the gas line 32 has a gas outlet opening 35 in the region of the lower end. The FIG. 3 shows in this connection a return line to the connection for a safety overflow valve, wherein it is also readily possible to combine further gas lines 35 and / or suction lines 31 in a removal unit 3. Due to the turbulence generated by the introduced gas, the substance mixture will mix very homogeneously, in particular in the area of the gas outlet openings 35, so that via a mouth 34 of the suction line 31 a very uniform mixture of the substance mixture can be sucked. The mouth 34 of the suction line 31 in this case has upwards, ie away from the ground, which is due to an arc section 33 at the lower end of the suction line 31. As a result, the mouth 34 is brought to some distance from the bottom of the container 4, so that there may form a sediment, which is not sucked by the suction line 31. Settling insoluble components from the calcium hypochlorite are not sucked in this way, so that an exposure of the pool water does not take place with these undesirable substances. After emptying the container except for this sediment, the sediment is returned together with the container 4 for disposal or reprocessing.

Thus described above is a method and a delivery unit for taking a liquid mixture from a container, wherein an improvement of the dosage is achieved by predetermined amounts, but at the same time a uniform mixing is achieved in that the suction line is associated with an additional gas line, via which vortexing, gaseous media stream is introduced into the substance mixture to be taken. This can be dispensed with consuming additional measures for stirring.

LIST OF REFERENCE NUMBERS

1

Conveyor

2

pump unit

3

withdrawal unit

4

container

5

pipe system

6

injection

20

pump housing

21

control

22

feed pump

23

suction

24

pressure connection

25

gas pump

26

gas pipe

30

container lid

31

suction

32

gas pipe

33

arc section

34

muzzle

35

Gas outlet

Claims (14)

Method for removing a liquid substance mixture from a container (4) via a removal unit (3), wherein the mixture mixes before and / or during a removal process by means of a gas line (26) which is introduced into the substance mixture via a gas line (26) becomes,
characterized in that the removal unit (3) is associated with a pump unit (2) with a feed pump (22), preferably a metering pump, via which the mixture is removed by means of a projecting into the mixture suction line (31). A method according to claim 1, characterized in that the mixing of the mixture by means of the gaseous media flow is controlled independently of the removal process. Method according to one of the preceding claims, characterized in that the suction line (31) at its free end an arcuate Mouth portion having a bow portion (33) of the arcuate mouth portion on the bottom of the container (4) holds the mouth (34) of the suction line (31) at a distance from the bottom of the container (4). Method according to one of the preceding claims, characterized in that the pump unit (2) structurally associated with an additional gas pump (25) via which gas, preferably outside air, is sucked in and introduced as a gaseous stream of media in the mixture. Method according to one of the preceding claims, characterized in that the removal process is preceded by a filling process in which added to a container located in the first material via a filling second material supplied to form the mixture, waiting for the addition of the second material, a mixing time and finally the filling unit is replaced with the removal unit (3). A method according to claim 5, characterized in that the filling unit comprises a T-shaped pipe section, via a container connection of the second material is conveyed into the container (4) and escape reaction gases, via a gas outlet opposite the tank connection, the reaction gases are discharged and via a Feed port of the second material is supplied. A method according to claim 6, characterized in that are neutralized via the gas outlet escaping reaction gases by means of an intermediate carbon filter. Method according to one of the preceding claims, characterized in that the mixture of substances comprises chlorine granules, preferably calcium hypochlorite, as the first substance and water as the second substance, and the extracted mixture is metered by means of a metering pump the swimming pool water of a swimming pool. Conveying device for taking off a liquid substance mixture from a container (4), comprising a pump unit (2) with a feed pump (22) and a removal unit (3) with a suction line (31) connected to the feed pump (22) and protruding into the mixture of substances, the pump unit (2) being associated with an additional gas pump (25) connected to a gas line (26) projecting into the substance mixture for introducing a gas into the substance mixture,
characterized in that the feed pump (22) and the gas pump (25) are arranged structurally in a pump housing (20), wherein the suction line (31) and the gas line (32) in the removal unit (3) combined, preferably enclosed by an outer shell are. Conveying device according to claim 9, characterized in that the feed pump (22) and the gas pump (25) are independently controllable. Conveying device according to claim 9 or 10, characterized in that the suction line (31) at its free end an arc portion (33) is assigned such that the direction of entry into the mouth (34) of the suction line (31) with the rest of the suction line (31 ) includes an angle of less than 90 °. Conveying device according to one of claims 9 to 11, characterized in that the gas line (32) is associated with a rotatable outlet unit, which defines a variable outlet direction of the gas from the gas line (32). Conveying device according to one of claims 9 to 12, characterized in that the feed pump (22) is a metering pump, preferably a peristaltic pump or a diaphragm pump. Conveyor according to one of claims 9 to 13, characterized in that the gas pump (25) draws in outside air and discharges into the substance mixture.

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