DE3627501C2 - Device for proportioning the amount of additives - Google Patents

Description

The invention relates to a device for quantities proportional dosage of additives in one Pipeline flowing medium.

The admixture of additives in liquid flowing media, such as it z. B. on water softening systems or in the addition of chlorine Drinking water is necessary, as is known, by inoculating the respective additive - the same of course from one Mixture of several components can exist - directly in the appropriate line. Appropriate measures can be taken partial turbulence can be achieved in the flowing medium, but good homogeneous mixing and precise dosing can be achieved not always achieve thereby.

In the case under the US patent no. 4.548.228 described device it is a facility in which solid chemicals solved by a partial flow and metered into the main flow.

The vaccination is carried out exclusively by the flowing water stream or by an air cushion when the water pressure is too low.

Different solution behavior of the chemicals with changing Water temperatures are not taken into account, just as little Dosing differences with only a small chemical supply in the Mixing tank.

The invention has for its object a device to create the type mentioned, the exact dosage of the Additive with a particularly good homogeneous mixture in the flowing medium guaranteed, where possible commercially available Find elements.

This object is achieved in a generic device solved by the characterizing features of claim 1.

The device according to the invention doses the liquid or previously liquefied solid chemicals from a constant Approach with a motor-driven fine dosing device in one Partial water flow. The addition is proportional to the quantity and independent of temperature. A homogenization takes place in the partial flow held in the mixing container. After the introduction of the dosed The swirler ensures a partial flow into the main flow perfect mixing or repeated homogenization.

The working methods of the two devices compared are therefore fundamentally different.

Beneficial Further developments in the invention result from the features of Claims 2 to 4.

Below is a preferred embodiment of the invention with With reference to the schematic drawings, for example described; it shows  

Fig. 1, the metering device according to the invention, connected to a fluid-carrying conduit;

Figure 2 shows the associated mixing container in partial section.

Fig. 3 shows the injector with post-swirling in section.

In order for larger amounts of liquid, such as. B. in softening systems are used for laundries or swimming pools, the most homogeneous possible mixing of additives to achieve water down to the smallest dilutions is enough known metering devices generally not.

In the device according to the invention, a bypass line ( 2 ) is branched off from the main line ( 1 ). A quantity of liquid which is reduced in relation to the main line ( 1 ) and which can be set appropriately should flow in it. This is achieved in that the flow rate of the main liquid flow can be set via a ball valve ( 3 ) in the main line ( 1 ) and a downstream pulse liquid meter ( 4 ). In the bypass line ( 2 ) is also a ball valve ( 5 ) for volume control and downstream a liquid speed meter ( 6 ) is arranged. The amount of liquid required in the bypass line ( 2 ) can be set via these two fittings ( 3, 5 ) and the measuring devices ( 4,6 ).

The dosage of the additives, e.g. B. chlorine, is carried out by the pulse liquid meter ( 4 ) via a batch container ( 7 ), the additive being pumped by a pump ( 8 ) to an injection point ( 9 ) in the bypass line ( 2 ). The additive is then mixed with the reduced amount of liquid in the subsequently arranged mixing container ( 10 ) and fed to the main line ( 1 ) through an inoculation tube ( 11 ).

In the swirler ( 12 ), which is provided behind the inoculation tube ( 11 ), the final mixing of the bypass flow containing main and additive takes place.

In the mixing container ( 10 ), the enriched liquid, as shown in FIG. 2, is fed to the outside ( 13 ), whereby it is swirled through a plurality of slit diaphragms ( 14 ), which are arranged at the inlet centered around an internal drain pipe ( 15 ). The outflow from the mixing container ( 10 ) takes place via outflow bores ( 16 ) located in the drain pipe ( 15 ), which are provided in the lower part of the same, slit diaphragms ( 14 ) also being arranged in front of the bores ( 16 ) here. The slots ( 17 ) in the slot aperture ( 14 ) are adapted in width to the respective requirements.

The enriched bypass flow, as shown in FIG. 3, is fed via the inoculation tube ( 11 ) to the central axis of the main line ( 1 ) and then again in the swirler ( 12 ) in which baffles ( 18 ) made of corrosion-free material are arranged, mixed with the main liquid flow.

The main line ( 1 ) z. B. in the dimensions of 2 '', the bypass line ( 2 ) in 3/4 '', the screwing elements and fittings consist of commercially available components.

A swirler ( 12 ) can be dispensed with under certain circumstances (e.g. in the case of dimensionally favorable and / or appropriately guided pipelines).

Claims (4)

1.Device for proportioning the quantity of additives into the medium flowing in a pipeline, characterized by a bypass line ( 2 ) of smaller cross-section branched off from the main line ( 1 ), which has an inoculation point ( 9 ) for inoculating the additive with a downstream mixing container ( 10 ) for swirling, at the outlet of which an inoculation pipe ( 11 ) opening into the main line ( 1 ) is connected, as well as with a ball valve ( 3 , 5 ) and a pulse liquid meter ( 4 , 6 ) each with a proportional contactor for setting the Flow rate of the liquid flow in the main line ( 1 ) or for setting a reduced amount of liquid in the bypass line ( 2 ). 2. Device according to claim 1, characterized by a pump ( 8 ) for conveying the additive from a batch container ( 7 ) to an injection point ( 9 ) in the bypass line ( 2 ), the pump ( 8 ) via the pulse liquid speed meter ( 4 , 6 ) is controlled in the main line ( 1 ). 3. Apparatus according to claim 1, characterized in that the mixing container ( 10 ) contains slit diaphragms ( 14 ) and a centrally arranged drain pipe ( 15 ) with holes ( 16 ) provided in the lower part thereof. 4. The device according to claim 1, characterized in that in a short pipe to the consumer after the inoculation tube ( 11 ) in the main line ( 1 ) a swirler ( 12 ) with baffles ( 18 ) for additional mixing of the main and bypass liquid flow is arranged.