DE102004046716A1 - Device for reducing aqueous foams comprises a spray nozzle for pressurized water arranged in the head of a suction container so that water jets hit a foam cushion at the base of the container to destroy the foam bubbles - Google Patents

Abstract

Device for reducing aqueous foams comprises a spray nozzle (1) for pressurized water arranged in the head (2) of a suction container (3) so that water jets (4) hit a foam cushion at the base of the container to destroy the foam bubbles.

Description

State of the art

Becomes with wet cleaning of the soil then the dirty liquor sucked, develops as a result of mixing with the suction strong foam.

Becomes hardly hardened concrete with the addition of water with so-called core drilling drilled or cut in it with diamond cutting discs and joints will do this for aspirated this required drilling or cutting process water, creates concrete-containing foam.

In sewage treatment plants arises at ventilation systems Foam in big Amount.

The Firefighters are setting frequently during fire-fighting foam made of water. Will this foam not soon after completion of the extinguishing work eliminated, it causes severe corrosion damage to machinery and equipment.

Foams out Water, which is added to the water by chemical means his natural surface tension take, disturb many technical processes.

Become such foams eliminated by suction, fill They very quickly the container in which they are sucked into. If the container is full, it will continue afterflowing Foam in the suction fan and does there appropriate damage.

On the other hand you bet often Wicks soaked in counteracting reagents and then they are hung in the absorbed foaming liquid. Purely by the time, however, these wicks react very hesitant. That's why you also use centrifuges, through which the foam before again too watery liquid power. But that is associated with high expenditure on equipment, the in many cases can not install at all.

All Suction devices for absorbing liquids which tend to foam, fail because that when sucking by mixing with the suction air evolving foam volume the devices extremely fast fills and she then save Operation sets. This represents an incalculable disadvantage represents.

Task of the here described Facility

Of the Device is based on the object, foams, which when sucking in mobile suction devices caused by mixing with the suction, so to reduce or liquefy, that they continue to move on and thus remove from the suction device to let.

The Device is characterized in that one charged with pressurized water Spray nozzle after Installed down in the head of a suction container that is installed she with her many small jets of water on the underneath forming foam surface such causes the foam to collapse and thus to be so strong reduces that in practically liquid form over one Centrifugal accelerator be transported out of the suction container can.

The device will be explained with reference to the embodiment of the accompanying figure:
A spray nozzle 1 is in the head 2 a suction container 3 attached so that their spray jets 4 on the surface of the foam forming under it 5 can meet. Via a supply hose 6 becomes the spray nozzle 1 Pressurized water, for example, supplied from a normal service water pipe.

The water jets 4 from the spray nozzle 1 meet the individual bubbles of the foam 5 and destroy them, so that the foam becomes water again.

The foam 5 forms out of the over the suction connection 7 sucked in liquid 8th by mixing with the suction air required for suction, which by the suction unit 9 is produced.

The suction unit 9 is flooded by a float valve 10 protected, in which a valve float 11 by floating it ensures that the intake manifold 12 is closed as soon as the liquid level increases accordingly.

The valve float 11 is a hollow body, which is designed by the weight of that of the possibly rising water 15 would be worn, but not from the rising foam. A valve float that is so light that it could carry foam, would be carried along by the suction even without being carried by the foam.

That is by spraying the foam 5 with the water from the spray nozzle 1 forming water 15 is by means of a centrifugal accelerator 13 continuously from the suction container 2 via a discharge hose 14 derived, so that the suction container 3 can not continue filling. This provides the possibility of continuous suction of foaming liquids through the suction port 7 and their continuous readmission tion via the centrifugal accelerator 13 and its discharge hose 14 guaranteed.

there is:

1

spray nozzle

2

head of the suction container

3

suction tank

4

spray jets

5

foam

6

supply hose

7

suction

8th

liquid

9

suction unit

10

float valve

11

valve float

12

intake

13

Centrifugal accelerator

14

drain tube

15

water

Claims (7)

A device for reducing aqueous foams, characterized in that a spray nozzle for pressurized water in the head of a suction container is mounted such that caused by the water pressure jets of water on a developing at the bottom of the suction container foam pad, which forms of foaming, aqueous liquid meet and thereby destroy the bubbles of the foam. Device according to claim 6.1, characterized in that the spray nozzle via a from outside of the suction container incoming supply line is supplied with pressurized water. Device according to claim 6.1, characterized in that the spray nozzle is located in a separate attachment, which can be dismantled by hand is. Device according to claim 6.1, characterized in that the suction container with a suction inlet connection and a suction outlet connection provided and is designed as a pre-separator to a suction device. Device according to Claims 6.1 and 6.4, characterized that the sucking outlet of the suction container is closed with a vertically arbejtenden valve, in which a floating hollow body is located as a sealing element. Device according to Claims 6.1 and 6.5, characterized that the suction tank the device by means of a negative pressure generating Suction unit is provided. Device according to claim 6.1, characterized in that the suction container in his lower half with an emptying unit, preferably one Centrifugal accelerator is connected and this aggregate at its Departure side providable with one of the derivative hose serving is.