CN1872708A

CN1872708A - Device for the flotation of a liquid

Info

Publication number: CN1872708A
Application number: CNA2006100848923A
Authority: CN
Inventors: 克劳斯·彼得·杰尼施; 亚历山德·克沙伊德尔; 弗里德里希·琥珀; 约瑟夫·格拉沃格
Original assignee: Moeller Gebaudeautomation GmbH
Current assignee: Andritz AG; Moeller Gebaudeautomation GmbH
Priority date: 2005-05-25
Filing date: 2006-05-22
Publication date: 2006-12-06
Also published as: EP1726366A1; AT501976B1; AT501976A1

Abstract

In the device floating liquid (10) by using container, the liquid is provided to container through at least one injection inlet (1) and conduit (7) along flowing direction (4) is at back of injection inlet. The place between injection inlet and conduit is equipped with slack (8) for providing gas, especially air. The proportion of small bubble in liquid is increased and floating is also improved.

Description

The device that is used for flotation liquid

Technical field

The present invention relates to a kind of device that is used for the liquid of flotation vessel, will be injected in this container by the liquid of flotation by at least one inlet.

Background technology

In floatation process, very tiny bubble is introduced in the liquid, the suspension in the papermaking for example, and when bubble floating was to liquid level, the solid particulate that remove from liquid or pollutent can amass and be attached on these bubbles.Then the foam of the long-pending attached solid particulate on the liquid level is removed.

A kind of device that liquid and bubble are injected in the container utilizes pressure to carry out the conveying of liquid by the inlet that is positioned at container liquid level top, and this can cause carrying in the liquid very dispersive air simultaneously.The bubble that obtains separates voluntarily, carries out above-mentioned flotation function then.

The liquid hold-time in the container depends primarily on the efficient of flotation, and the efficient of flotation depends on the content and the size of bubble.Therefore, the present invention sets up the task that the basis provides a kind of device of the above-mentioned type, and wherein, the ratio with maximum possible in the liquid in container produces tiny bubble.

Summary of the invention

Utilization has in the claim 1 device of special characteristic and realizes above-mentioned task.

In the present invention, can not enter immediately in liquid or the suspension from the injection stream of inlet, but at first flow in the conduit that is installed in the inlet back, thereupon, the injection stream of liquid enters in the liquid.Be used to provide the particularly gap of the gas of air owing between inlet and conduit, be provided with, can improve the AIR Proportional that liquid jet is carried secretly or carried, allow to form a large amount of very dispersive bubbles.

In a preferred embodiment of the invention, the internal diameter of conduit is bigger than the external diameter of inlet.Like this, can form the annular gap between inlet and conduit, extra air can enter in the liquid by described gap very effectively.

In one embodiment, inlet can directly extend in the conduit.In the optional embodiment of another one, the flow direction along liquid between conduit and inlet has the gap.By these two embodiment, can be used to supply the size and the layout in the gap of air with very high precision setting, this means that also fixed supply accurately is introduced into the air capacity in the liquid.

By the problem that liquid is provided on the fluid surface of inlet in being contained in container be, the foam quilt that is stained with solid particulate near the liquid level of immediate vicinity of fluid inlet is drag down once more, and this is a shortcoming that influences the floatation process whole efficiency.

In order to address this problem, a preferred embodiment of the present invention requires described conduit to be immersed in the liquid.Because conduit is immersed in the liquid, guarantees on the liquid level that the buoyant foam can be near the inlet that not enter in the liquid, thereby prevent that reliably the foam that swims on the liquid level from being dragged down in the liquid once more by liquid injection port.

Another preferred embodiment of the present invention requires another one conduit streamwise is installed in after first conduit, and the gap that requires to be used to supply the gas of air particularly is between first conduit and this another conduit.

Utilize this another conduit, can be formed for supplying another gap of air, the result can further improve the AIR Proportional that is provided in the liquid.

In a preferred embodiment, the internal diameter of this another conduit can also be greater than the external diameter of first conduit.And if another conduit is installed, first conduit may extend to another catheter interior, perhaps may reserve the gap along liquid flow direction between first conduit and another conduit.

Within the scope of the invention, preferably another conduit is immersed in the liquid, its effect is illustrated, and so therefore the foam that prevents to float on the liquid level is dragged down and in the liquid once more.

In order further to improve the ratio of liquid hollow gas, the conduit that is used for supply gas, particularly air can be positioned at inlet in addition.

At last, scope of the present invention also can require inlet, first conduit and another conduit to align with the mode that liquid level forms the angle be not equal to 90 °, if can use this another conduit.Like this, in container, can produce controlled flowing, utilize controlled flowing, the bubble that produces can be guided to the part of container, in this part, the uncrossed rising of bubble, and for example can especially easily defoam.

Description of drawings

In the following explanation that the reference accompanying drawing carries out possibility embodiment of the present invention, other features and advantages of the present invention are described.

In the accompanying drawings:

Fig. 1 illustrates first embodiment that can be used in according to the inlet in the device of the present invention;

Fig. 2 illustrates second embodiment of the inlet with the conduit that is used to provide air;

Fig. 3 illustrates the first embodiment of the invention of the conduit with the liquid level top that is installed in the container;

Fig. 4 illustrates the embodiment of the invention according to Fig. 3, but conduit is immersed in the liquid;

Fig. 5 illustrates the embodiment of the invention with two conduits, and wherein, conduit is installed in the top of liquid level in the container; With

Fig. 6 illustrates the embodiment according to Fig. 5, and wherein, the conduit of below immerses in the liquid.

Embodiment

Fig. 1 illustrates the embodiment of inlet 1, and inlet 1 is connected with feed line 2.Provide liquid by feed line 2 along the direction of arrow 3, particularly from the suspension of paper-making process, and liquid is discharged from inlet 1 along the direction of arrow 4.

In Fig. 2, second embodiment of inlet 1 is shown, it also can be with in the present invention.In this embodiment, inlet is connected to feed line 2 once more,, provides suspension along the direction of arrow 3 here, and discharges suspension along the direction of arrow 4 from inlet 1.Also have conduit 5 in inlet 1, be used to provide air, air is discharged from conduit 5 along the direction of arrow 6.

The first embodiment of the present invention shown in Figure 3, wherein along the flow direction 4 of suspension, conduit 7 is positioned at the back of inlet 1.The internal diameter of this conduit is bigger than the external diameter of inlet 1.And, between conduit 7 and inlet 1, have the gap along the direction of arrow 4.And by the gap 8 that therefore forms, along the direction of arrow 9, the suspension that comes out from inlet 1 carries air, and at inlet 1, the mixture of air and suspension flows through conduit 7 and enters in the liquid, and liquid level is represented with label 10.

Because liquid jet carries air through gap 8, liquid and AIR MIXTURES form the bubble of very disperse to enter liquid at a high speed, want removed solid particulate to stick on the bubble, bubble rises to the surface then, then, can remove the foam of such formation from liquid level 10.

Embodiment shown in Figure 4 is different with the embodiment of Fig. 3, and wherein, conduit 7 is immersed in the liquid.This prevents that the buoyant foam is dragged down and in the liquid once more by liquid jet near conduit 7 the liquid level 10.

Compare with embodiment shown in Figure 3, the embodiment of Fig. 5 is except being provided with first conduit 7, also be provided with another conduit 11, another conduit 11 and first conduit 7 form gap 12 in a similar fashion, by gap 12, direction along arrow 13 can suck more air, and air enters in the liquid with liquid jet.

The difference of embodiment shown in Figure 6 and embodiment shown in Figure 5 is, also another conduit 11 is immersed in the liquid to be similar to mode shown in Figure 4, thereby prevents that foam from being dragged down and in the liquid by liquid jet.

At Fig. 3 in all embodiment shown in Figure 6, also can use inlet shown in Figure 2 replace with Fig. 1 in the corresponding inlet 1 of inlet.Certainly, also can use the inlet of other type.Another may be that streamwise, inlet 1 enter first conduit 7 and/or first conduit 7 enters another conduit 11.

At last, replace aliging with inlet 1, and further, first conduit 7 and/or another any conduit 11 form 90 ° angle with liquid level 10, as shown in the figure, another possibility is that the angle that forms is not equal to 90 °, its effect is below inlet 1 and conduit 7 and/or another conduit 11, and bubble can not rise with general symmetrical manner, still, can rise symmetrically in the zone far away that substantially is separated by, thereby realize different flotation characteristics.

Claims

1. device that is used for flotation liquid, has container, will be provided in the container by the liquid of flotation by at least one inlet (1), it is characterized in that, flow direction (4) along liquid is installed conduit (7) afterwards at inlet (1), and have the gap (8) that is used for supply gas between inlet (1) and conduit (7), described gas refers in particular to air.

2. device as claimed in claim 1 is characterized in that, the gap (8) between inlet (1) and the conduit (7) is positioned at a distance of container liquid level top.

3. device as claimed in claim 1 or 2 is characterized in that, the internal diameter of conduit (7) is bigger than the external diameter of inlet (1).

4. device as claimed in claim 3 is characterized in that, inlet (1) directly extends in the conduit (7).

5. as each described device in the claim 1 to 3, it is characterized in that, between conduit (7) and inlet (1), having the gap along the flow direction (4) of liquid.

6. as each described device in the claim 1 to 5, it is characterized in that conduit (7) partly is immersed in the liquid.

7. as each described device in the claim 1 to 5, it is characterized in that, flow direction (4) along liquid, at first conduit (7) another conduit (11) is installed afterwards, and between first conduit (7) and another conduit (11), have the gap (13) that is used for supply gas, described gas refers in particular to air.

8. device as claimed in claim 7 is characterized in that, the gap (13) between first conduit (7) and another conduit (11) is positioned at a distance of container liquid level top.

9. device as claimed in claim 8 is characterized in that, the internal diameter of another conduit (11) is bigger than the external diameter of first conduit (7).

10. device as claimed in claim 9 is characterized in that, first conduit (7) directly extends in another conduit (11).

11. device is characterized in that along the flow direction of liquid, having the gap between another conduit (11) and first conduit (7) as claimed in claim 8 or 9.

12., it is characterized in that another conduit (11) is immersed in the liquid as each described device in claim 1 to 5 or 7 to 11.

13., it is characterized in that inlet (1) comprises the conduit (5) that is used for supply gas as each described device in the claim 1 to 12, gas refers in particular to air.

14. as each described device in the claim 1 to 13, it is characterized in that, inlet (1) and first conduit (7) and if another conduit (11) that can use to align with the mode that liquid level (10) forms the angle be not equal to 90 °.