CN203334111U

CN203334111U - Degassing device

Info

Publication number: CN203334111U
Application number: CN2011900007462U
Authority: CN
Inventors: A.厄兹勒; A.索特; C.班格特
Original assignee: Voith Paper Patent GmbH
Current assignee: Voith Patent GmbH
Priority date: 2010-09-21
Filing date: 2011-09-06
Publication date: 2013-12-11
Anticipated expiration: 2021-09-06
Also published as: WO2012038245A1; DE102010041100A1

Abstract

The utility model relates to a degassing device used for enabling fiber suspension liquid (1) in a degassing chamber (2) in negative pressure to be degassed. The fiber suspension liquid (1) is introduced in the degassing chamber (2), and separated gas is pumped out of the degassing chamber (2). Therefore, the efficiency of the degassing device is improved through compact arrangement, and the fiber suspension liquid (1) is at least partially applied to at least one degassing face (3) in the degassing chamber (2) and flows down from the degassing face (3).

Description

Degasser

Technical field

The utility model relates to and a kind ofly for the degas chamber closed, fibrous suspension is carried out to degassed equipment, fibrous suspension is introduced in closed degas chamber by one or more entrances with inlet opening, wherein, fibrous suspension is gathered in the bottom of degas chamber, and this degas chamber is connected with the negative pressure source of extracting the isolated gas of institute out above the fibrous suspension of assembling and degassed fibrous suspension exports discharge by least one of degas chamber bottom.

Background technology

Just known this for degassed equipment for a long time, wherein, the principle of work and power is basically, allows fibrous suspension evaporate under negative pressure.

When the gas that will separate with fibrous suspension by negative pressure source is taken away, degassed fibrous suspension can take out by the corresponding hole of container bottom.

At this, overfall not only guarantees the liquid level in stable container, and guarantees the light impurity on liquid surface that gathers of carrying-off fibrous suspension.

Degassed in order to strengthen, for example known from DE4106140 and DE19947905, allow the fibrous suspension of input and chamber wall clash into, this causes fibrous suspension splash in container.

But this also causes forming corresponding turbulent flow in the fibrous suspension of assembling, thereby affect the hydraulic stability of rearmounted unit.

In order to suppress, entrance and exit also designs very greatly mainly with the larger size apart from space layout and/or container greatly.

Summary of the invention

Therefore, technical problem to be solved in the utility model is to improve degassed efficiency by compact as far as possible layout in as far as possible little cost situation.

Press the utility model, at least one degassed that fibrous suspension is applied in degas chamber at least in part is upper, and flows down on this degassed.

When fibrous suspension flows down on degassed, form thin suspension layers on this degassed, this suspension layers can be relatively gently by negative pressure degasification in degas chamber.Because fibrous suspension keep at least basically sticking to degassed upper, so the turbulent flow formed while having avoided fibrous suspension as be gathered in bottom to turn back on container.

For fear of being applied to turning back of fibrous suspension on degassed, set the quite little flowing velocity that applies accordingly angle and fibrous suspension when applying.

In many cases, the only part of fibrous suspension flows down and other parts drippage or splash may be just enough from degassed.

But consider as far as possible effectively that degassed and associatedly formation turbulent flow seldom advantageously in the fibrous suspension of the bottom that is gathered in degas chamber, by major part, preferably all fibrous suspensions to be de-gassed are applied at least one degassed in degas chamber, and flow down on this degassed.

The fibrous suspension flowed down can be in this wise with may, even only marginally from the fibrous suspension of degassed drippage, together be gathered in the bottom of degas chamber and drain by outlet from here.

In order to strengthen degassed will be advantageous that, degassed preferably stops above the fibrous suspension in being gathered in degas chamber, and fibrous suspension drips from here slightly.Because drip from little height, so also only make while in bottom, assembling fibrous suspension, form little and general acceptable turbulent flow.

But consider while in bottom, assembling degassed fibrous suspension and form as few as possible turbulent flow, degassed face should be directed to fibrous suspension the surface that is gathered in the fibrous suspension in degas chamber.

With regard to equipment equipment, importantly, fibrous suspension is applied at least one degassed in degas chamber at least in part, this degassed bottom that fibrous suspension is guided into to degas chamber.

But in order to bring into play fully by advantage described in the utility model, major part, preferably all fibrous suspensions to be de-gassed are applied at least one degassed in degas chamber.

For this reason, degas chamber can have one or more vertical or tend to vertical degassed.The width of degassed is larger, and fibrous suspension also will be distributed on this degassed goodly.This has utilized this situation, and thin suspension layers also can be better by degassed.

For this reason, degassed can be arranged in degas chamber.But when forming, structurally simplified degassed the inwall by degas chamber.

Generally for fibrous suspension is clog-free, flow down advantageously, degassed face is designed to smooth and is designed to preferably level and smooth.

Certainly, for the surface that increases degassed will be advantageous that, degassed face is designed to profile and preferably has protuberance, as lath, peg etc.This is particularly useful for expectation maybe can stand the situation of a part of fibrous suspension from the protuberance drippage of degassed.

In order to keep the liquid level in degas chamber constant, but, also in order to drain impurity, degas chamber should have the overfall of known type and structure.

When degas chamber, when preferably horizontally-arranged, cylindrical container forms, degas chamber is constructed very simply.

For this reason advantageously, entrance is parallel to by least one that cylinder axis is that extend on degas chamber top, input channel that have some inlet openings of the forms such as gap, hole forms.

For guaranteeing to have almost equal pressure at each inlet opening place along input channel, the cross section of input channel reduces along the flow direction of fibrous suspension, preferably reduces continuously.

For avoiding fibrous suspension turn back or drip when being applied on degassed, the length of suspension beam from inlet opening to degassed is less than 0.5m, preferably be less than 0.3m and/or point to the beam of degassed and degassed angulation 0 ° to 25 °, preferably between 5 ° to 15 ° from inlet opening.

Therefore, the utility model allows stronger degassed.In addition, so, because forming little turbulent flow outlet when being gathered in the degassed fibrous suspension of bottom can arrange by more close entrance, this has realized more compact structure of degas chamber, and therefore not only saved space and also provided cost savings.

The accompanying drawing explanation

A plurality of embodiment of following use further set forth the utility model.In accompanying drawing:

Fig. 1 a and Fig. 1 b: be the vertical and horizontal schematic cross-section of degassing equipment, and

Fig. 2 a and Fig. 2 b: the vertical and horizontal schematic cross-section of the another kind of embodiment of degassing equipment.

The specific embodiment

In both cases, degas chamber 2 is formed by horizontally-arranged cylindrical container 10, and wherein, fibrous suspension 1 to be de-gassed is applied on degassed 3 in the top of degas chamber 2.

On this degassed 3, fibrous suspension 1 flows to the bottom of container 10, and it is assembled at this.Fibrous suspension 1 top, part degas chamber 2 that are positioned at gathering are connected with negative pressure source by negative pressure joint 7.

In degas chamber 2, existing negative pressure causes the suspension evaporation flowed down on degassed 3.Because the suspension layers on degassed 3 is relatively thin, so its is degassed also very effective.

Therefore, degassed fibrous suspension 1 can be drained by the outlet 4 on the bottom of container 10 as is known simply.

The quadrangular tube that extends to container 10 by Fig. 1 a and Fig. 1 b from outside by the cylinder axis 11 that is parallel to container 10 for the entrance 6 of fibrous suspension 1 to be de-gassed forms, and its internal cross section reduces continuously along the flow direction of fibrous suspension.At this, quadrangular tube simple in structure is distributed with a plurality of inlet openings 12 that are parallel to the gap form of cylinder axis 11 extensions on length.

The realization that reduces by cross section forms approximately equal pressure on these inlet openings 12.

For simplified structure, the inwall that container 10 is level and smooth is used as degassed 3 at this.Correspondingly, fibrous suspension 1 is applied to inwall from the both sides of quadrangular tube by inlet opening 12, and from here, the fibrous suspension 1 flowed down is directed to the fibrous suspension 1 of assembling on the bottom of container 10.

The liquid level of the fibrous suspension 1 of assembling is definite by overflow pipe, and this overflow pipe directs into container 10 from bottom.

Not only unnecessary fibrous suspension is drained by this overfall 5, and the lip-deep impurity that is gathered in fibrous suspension 1 is also drained by this overfall 5.

Because fibrous suspension to be de-gassed 1 flows down from the inwall of container 10 largely, so fibrous suspension 1 hydraulic pressure of assembling on the bottom of container 10 is metastable.For this reason, entrance 6, export 4 and overfall 5 can mutually closely arrange, in order to form very compact device, wherein, overfall 5 along cylinder axis 11 observe should preferred arrangements entrance 6 with export between 4.

In order to enlarge the surface of degassed 3, the liquid level in container 10 at this even lower than cylinder axis 11.

With it differently, in the form of implementation of pressing Fig. 2 a and Fig. 2 b, entrance 6 is parallel to input channel that cylinder axis 11 extends abreast in the top of container 10, cylindrical by two and forms.

Be extended with vertical other plate of degassed 3 13 that is used to form between these two input channels, this plate 13 extends to the liquid level of the fibrous suspension the bottom that is gathered in degas chamber 2 from input channel.

The internal cross section of input channel also reduces at this along the flow direction of fibrous suspension 1.

Certainly, be designed to equally inlet opening 12 gap, input channel fibrous suspension 1 not only is applied on the inwall of container 10, and be applied on described plate 13.

In order further to enlarge the surface of degassed 3, the inwall of container 10 has for example protuberance 8 of lath and peg form at this.

Plate 13 additional degassed 3 also as these protuberance 8 realized thinner suspension layers, thereby contribute to the degassed of suspension layers.

As shown in FIG. 2, overfall 5 also can be arranged in container 10 with the opposed side of entrance 6 so that export 4 with regard to cylinder axis 11 between entrance 6 and overfall 5.

For this reason, the possible implementation as another overfall, the bottom of container 10 is cut apart by dividing plate 9 between outlet 4 and overfall 5.Therefore, the part that degassed fibrous suspension 1 only overflows dividing plate 9 just enters in overfall 5.

In order to apply with energy as far as possible still less fibrous suspension 1, and therefore keep sticking on degassed 3, the length of suspension beam from inlet opening 12 to degassed 3 should be less than 0.3m.In addition, the beam and degassed 3 angulations that point to degassed 3 from inlet opening 12 should be 5 ° to 15 °.

Claims

1. one kind is carried out degassed equipment for the degas chamber closed to fibrous suspension (1), described fibrous suspension (1) is introduced in described degas chamber (2) by one or more entrances with inlet opening (12) (6), wherein, described fibrous suspension (1) is gathered in the bottom of described degas chamber (2), described degas chamber (2) the top of the fibrous suspension (1) of described gathering and suction the negative pressure source of isolated gas be connected, described degassed fibrous suspension (1) is discharged by least one outlet (4) in the bottom of described degas chamber (2), it is characterized in that, described fibrous suspension (1) is applied at least one degassed (3) in described degas chamber (2) at least in part, described degassed (3) are guided into described fibrous suspension (1) bottom of described degas chamber (2).

2. by equipment claimed in claim 1, it is characterized in that, most fibrous suspension (1) to be de-gassed is applied at least one degassed (3) in described degas chamber (2).

3. by equipment claimed in claim 2, it is characterized in that, all fibrous suspensions to be de-gassed (1) are applied at least one degassed (3) in described degas chamber (2).

4. by the described equipment of claim 1 or 2, it is characterized in that, the top of described degassed (3) fibrous suspension (1) in being gathered in described degas chamber (2) stops.

5. by the described equipment of claim 1 or 2, it is characterized in that, described degassed (3) are directed to described fibrous suspension (1) on the surface of the fibrous suspension (1) be gathered in described degas chamber (2).

6. by the described equipment of claim 1 or 2, it is characterized in that, described degassed (3) are formed by the inwall of described degas chamber (2).

7. by the described equipment of claim 1 or 2, it is characterized in that, described degassed (3) are smooth.

8. by equipment claimed in claim 6, it is characterized in that, described degassed (3) are level and smooth.

9. by the described equipment of claim 1 or 2, it is characterized in that, described degassed (3) are designed to profile.

10. by equipment claimed in claim 9, it is characterized in that, described degassed (3) are designed to have protuberance (8).

11. by equipment claimed in claim 9, it is characterized in that, described degassed (3) are designed to have lath or peg.

12. by the described equipment of claim 1 or 2, it is characterized in that, described degas chamber (2) has overfall (5).

13. by the described equipment of claim 1 or 2, it is characterized in that, described degas chamber (2) is formed by cylindrical container (10).

14. by the described equipment of claim 13, it is characterized in that, described cylindrical container (10) is horizontally-arranged.

15. by the described equipment of claim 13, it is characterized in that, input channel that described entrance (6) is extended by the axis that at least is parallel to described cylindrical container (10) (11) in the top of described degas chamber (2), that have some inlet openings (12) forms.

16. by the described equipment of claim 15, it is characterized in that, the cross section of described input channel reduces along the flow direction of described fibrous suspension (1).

17. by the described equipment of claim 16, it is characterized in that, the cross section of described input channel reduces continuously along the flow direction of described fibrous suspension (1).

18. by the described equipment of claim 1 or 2, it is characterized in that, the suspension beam is from described inlet opening (12) until the length of described degassed (3) is less than 0.5m.

19. by the described equipment of claim 18, it is characterized in that, described suspension beam is from described inlet opening (12) until the length of described degassed (3) is less than 0.3m.

20. by the described equipment of claim 1 or 2, it is characterized in that, from described inlet opening (12), point to the beam of described degassed (3) and described degassed (3) angulation 0 ° to 25 °.

21. by the described equipment of claim 20, it is characterized in that, from described inlet opening (12), point to the beam of described degassed (3) and described degassed (3) angulation 5 ° to 15 °.