CN1134567C - Method and apparatus for pretreating paper pulp - Google Patents
Method and apparatus for pretreating paper pulp Download PDFInfo
- Publication number
- CN1134567C CN1134567C CNB99809921XA CN99809921A CN1134567C CN 1134567 C CN1134567 C CN 1134567C CN B99809921X A CNB99809921X A CN B99809921XA CN 99809921 A CN99809921 A CN 99809921A CN 1134567 C CN1134567 C CN 1134567C
- Authority
- CN
- China
- Prior art keywords
- paper pulp
- equipment
- water tank
- separate pot
- gas separate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/26—De-aeration of paper stock
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
The present invention relates to a method and apparatus for pretreating paper pulp. The method and apparatus according to the invention are especially preferably applicable to be used in the paper machine approach system of paper machines producing filler-containing grades. A characterizing feature of the method and apparatus according to the invention is that a propeller pump is used as the gas separation tank (16) feed pump (120).
Description
The present invention relates to be used for the method and apparatus of pretreating paper pulp.Particularly preferably be applicable to the paper machine input system so that optimize the operation of so-called short circuit current journey (short circulation) according to method and apparatus of the present invention.
Almost all prior aries to paper machine carry the paper machine input system of paper pulp, as United States Patent (USP) 4, paper machine input system described in 219,340 all comprises following part: a white water tank, all has delivery pump between they are at different levels centrifugal clarification equipment, one has gas separate pot, a vane pump, a hopper filter, a paper machine hopper and the plain boiled water pallet that vacuum forms device.Combine with paper machine operation and according to following operation of described these parts: introduce in the white water tank that is usually located at the machine floor level to be mixed with the fibrous material of paper grade (stock) with by the filler that the so-called plain boiled water from paper machine wire netting part is diluted from machine chest (machine chest).By means of the delivery pump that also is positioned at the machine floor level with this fibrous suspension from be usually located at the machine level be the position level of paper machine or as described the white water tank of the level of position described in the patent be pumped into first of the centrifugal clarification equipment that is positioned at its top and purify level.Level that centrifugal clarification equipment generally includes is some (usually most 4～6), at different levels generally have a personal delivery pump.The pressure that produces by means of this delivery pump purifies the fibrous suspension that receives in the level at centrifugal clarification equipment first and is transported to the gas separate pot that generally is positioned at above the paper machine level again.In fact this device is positioned at above about 10～12 meters, white water tank surface.Fibrous suspension is subjected to the effect of the vacuum of vacuum plant generation in gas separate pot, this vacuum plant is the liquid circulation pump usually mostly, thus in the suspension separated gas part and the gas that in suspension, becomes the minute bubbles form all rise to liquid surface in the jar above and discharge from jar by vacuum plant.Gas is flowed into the vane pump that is positioned at the machine floor level by the fibrous suspension of as far as possible fully getting rid of from gas separate pot, this delivery pump is pumped into fibrous suspension the hopper filter (not shown in described US patent) that also is arranged in the machine floor level again, and fibrous suspension flows to the paper machine level and enters the hopper of paper machine afterwards.
A problem in the paper machine input system of prior art is its huge volume and long and large-scale pipe-line system, and its huge volume mainly is because the volume of gas separate pot and centrifugal clarification equipment causes.Except space availability ratio and relating to the bigger investment aspect, volume itself is not a subject matter, but because the long-time delay that large volume causes limits grade basically changes and cause changing relevant a large amount of waste paper with grade.With grade change relevant, the relative quantity of the whole components of fibrous suspension in whole input system by evenly before the composition that meets desired final products, waste paper is formed by the whole paper pulp that are used to produce final products.
Described problem was discussed in Finland FI patent 89728, according to this patent, partly collected different types of plain boiled water and it is directly led the short circuit current journey of paper machine into and did not use any existing white water tank from the wire netting of paper machine.In this bulletin, below each plain boiled water pallet, has a pump that is used for plain boiled water is delivered to an appropriate location.The plain boiled water guide groove that this bulletin is described is very shallow flat, and promptly little volume so that shorten time delay as far as possible.In the solution according to this bulletin, what be arranged on wire netting part side is a compact pumping container and the device that pumping operation is provided, and by it plain boiled water is conveyed in the technological process again.Yet the exhaust that reaches by means of this device also not yet in effectly moves to being enough to keep paper machine uninterruptedly.
Except relating to space availability ratio and big liquid capacity, be noted that centrifugal clarification equipment also causes other problems.It is can guarantee that according to its position is selected to just in time the fibrous suspension before the hopper of paper machine does not contain the particle that is not suitable for papermaking that the traditional location of centrifugal clarification equipment in the paper machine input system has been illustrated, for example sand, fritter bark, fragment and even excessive filling block, they all are called for example impurity or impurity particle.Yet, in the experimentation that we finish, notice, particularly contain under the situation of paper machine of filler grade the major part of getting rid of by described centrifugal clarification equipment that is in the same old way be suitable for papermaking by the part of getting rid of in the liquid stream that flows to the paper machine hopper in production.An one reason is that the size of determining the cyclone of centrifugal clarification equipment makes it to be suitable for preventing that the material that any discomfort is closed from entering hopper, and centrifugal purifier can be designed to only operate with a kind of material or minority materials similar with best mode on the other hand.Consider the very different density of for example various components such as fiber and mineral based filler, be easy to believe that centrifugal clarification equipment can not be finished the best use of for any component in the sort of purposes, but that the basic purpose of centrifugal clarification equipment must be the ratio that keeps the various components in the fibrous suspension is constant substantially and prevent that any discomfort from closing the hopper that enters paper machine in the particle of papermaking in purification process.In fact, same problem has been discussed in FI patent 93753 and 97736, but approval is from the existence of the discarded object of centrifugal clarification equipment.
A preferred solution of the problems referred to above be it is said each component of pulp treatment respectively.These components such as new fibrous suspension, secondary stock, recycled fiber, filler all were in zone separately before mixing.In this case, in each purposes, can select optimal purification method and device to each component.The part of consequently having only each to purify is introduced into the short circuit current journey of paper machine and does not need centrifugal clarification equipment fully.In addition, that employing is suitable for this specific purpose and determine that by this purpose it is more effective basically that the device of size purifies each component, and with regard to energy consumption is more economical, compares with the centrifugal clarification equipment of prior art and can select the device that is fit to of realizing purification.
The subsidiary problem that also has some to cause by centrifugal clarification equipment.Because very big liquid capacity and complicated flow duct system, the fluctuation of centrifugal clarification equipment on direct generation pulp flow and the pulp pressure then tended to keep at least and may be strengthened these fluctuations.And complicated centrifugal clarification equipment comprises, and some (common most 4～6) levels and the less flow unit of taking measurements greatly form main flow resistance, adopt several large-scale centrifugal pumps to compensate this resistance and consume energy very much.Each the purification level that is generally centrifugal clarification equipment is provided with an independent delivery pump, and in a medium scale equipment, the general power of whole pumps of the short circuit current journey of paper machine requires to be about 2MW in this case.
Another particularly is the short circuit current journey part position each other of equipment to the influential factor of the energy consumption of pumping.First shortcoming of noticing is that the position of gas separate pot is arranged on the height that is higher than the paper machine level usually.If gas separate pot can be moved to the paper machine level, just can not need to take the pumping fibrous suspension with the delivery pump that is higher than the paper machine level.Yet, its prerequisite is gas separate pot to be constructed to be permeable to not have the operation of overflow ground, because in fact the operation that overflow arranged needs higher free drop from paper machine level top to paper machine level below, the pump that perhaps is configured to comprise the operation that combines with overflow is so that generation guarantees to have the pressure differential of flooded operation.In other words, when using first scheme, the liquid level of gas separate pot (or rather, the inlet pressure of vane pump) can be can't help overflow and determined, but should find certain alternative method.Because the basic purpose of the adjustment of the liquid level of gas separate pot is to keep the inlet pressure of vane pump constant as previously discussed, in fact it is more economical adopting an Adjustment System, because this is except changing liquid level, also can change the fluctuation of pulp density, this fluctuation is significant sometimes.As a result, this change will be followed the improvement of paper product matter and stablizing of manufacturing technique.Therefore, consequently with regard to the energy consumption of pumping more economical solution, simultaneously have obviously favourable effect aspect the quality of paper and the process flowability.
Also having a factor that influences pumping energy consumption in the paper machine input system is the height of white water tank.White water tank is promptly collected the jar of so-called plain boiled water from paper machine, it is the about 10 meters high larger containers that are positioned at paper machine floor level place traditionally, and the liquid level of these jars fluctuation is very big.A different reason of liquid level is the position of the white water tank that for example is used in combination with paper machine.Under the situation of so-called modified form fourdrinier machine, white water tank, also be referred to as wire netting pit (wire pit) in this case, it is positioned at the below of wire netting part, even therefore structural reason also causes the liquid level of white water tank lower.The liquid level that is arranged on (the outer pits of a so-called machine) such as white water tanks on wire netting part next door do not resemble eventually yet in fact possible height.Be considered to the favorable factor of process for stabilizing flow process based on the existence of large-scale surge tank, proved that large-sized white water tank is suitable.This also causes increasing some energy consumptions, because the beginning delivery pump must compensate low sometimes liquid level of white water tank and because very big time delay in the flow process that the big volume of white water tank causes.
Can avoid described in the input system of the present invention and be positioned at the equipment floor level, promptly in the position of paper machine white water tank below horizontal.Make its level place that white water tank can be arranged on paper machine according to solution of the present invention, the gas separate pot that is positioned at the white water tank side thus also is arranged on the level place of paper machine.
When for example solving described problem in the above described manner, can further improve the paper machine input system as the delivery pump of gas separate pot by adopting a propeller pump, propeller pump has significantly less power requirement and than centrifugal pump better head ratio basically.In this case, all raw materials or at least the major part of raw material be conveyed into gas separate pot by this propeller pump.With regard to its actual characteristic, propeller pump is applicable to this purpose better than centrifugal pump, but in that it can not be used in the described purposes in early days, because propeller pump does not meet the head requirement of the technological process of prior art.Compare with the power requirement of about 2000KW of prior-art devices, adopt a propeller pump to cause energy consumption to be about 200KW, promptly can save about 90% of power demand.
According to a preferred embodiment of the present invention, can further improve the paper machine input system by the delivery pump of from input system, abandoning described gas separate pot fully.This can realize by gas separate pot being moved down into the paper machine level simply under some suitable condition, thus from white water tank to gas separate pot carry whole fibrous suspensions or at least the needed pressure differential of its major part be so little so that this pressure differential can be that one/a plurality of vavuum pumps of gas separate pot produce by means of vacuum plant.According to the setting of this embodiment, can be provided with a valve in case of necessity so that control from the flow of white water tank to gas separate pot.
Utilizing some advantages of method of the present invention for example is:
-because accurate screening has reduced discarded object generally;
More stable operation in the short flow process of-paper machine;
Less flow resistance in the short flow process of-paper machine;
Space in the-saving paper machine short circuit current journey;
-saving pumping energy needed;
-short time delay;
-grade changes fast;
-the technological process of cleaning, no bacterial growth;
The investment of-simple structure-economically.
The feature of method and apparatus of the present invention is described in the attached Patent right requirement.
Below, method and apparatus of the present invention is described in detail with reference to accompanying drawing.Wherein:
Fig. 1 mainly illustrates the technical scheme according to the prior art of US patent 4219340;
Fig. 2 illustrates the technical scheme according to a preferred embodiment of the present invention; And
Fig. 3 illustrates the technical scheme according to second preferred embodiment of the present invention.
The input system of prior art shown in Figure 1 comprises that a white water tank 10, a delivery pump 12, a centrifugal clarification equipment 14 (having some levels, not shown), one have the hopper 22 and the plain boiled water collection channel (not shown) of the gas separate pot 16 of vacuum plant 17, a vane pump 18, a hopper filter 20, a paper machine.Described these parts combine with paper machine 24 operation and according to operation as described below.Introduce with the fibrous material that can comprise new paper pulp, regenerated paper pulp and/or waste paper of paper grade (stock) and by the filler of mainly partly obtaining from the wire netting of paper machine that so-called plain boiled water diluted and to collect the white water tank 10 that plain boiled water is arranged so that produce paper pulp, wherein white water tank 10 is usually located at the floor level of equipment in being provided with of prior art.Delivery pump 12 by means of the floor level place that also is positioned at equipment is pumped into centrifugal clarification equipment 14 with described paper pulp from white water tank 10, the horizontal K of machine (equipment level of paper machine 24) that this centrifugal clarification equipment is usually located at equipment locates, and this cleaning equipment comprises 4～6 grades usually mostly.The raw material that receives by the first order of centrifugal clarification equipment 14 again under the pressure effect that delivery pump 12 produces (together with the booster action of the vacuum of gas separate pot) continue to be fed into the gas separate pot 16 at the horizontal T place that is positioned at paper machine level top.Gas separate pot 16 generally comprises overflow to keep the liquid level of raw material in jar constant.It is below horizontal and enter the white water tank 10 that is positioned at the equipment floor level that the raw material of discharging from jar during overflow flows to paper machine downwards.Basically gasless paper pulp that is the paper pulp of therefrom having got rid of gas by vacuum plant 17 as far as possible fully flow into the vane pump 18 of the floor level of the equipment that is positioned at from gas separate pot 16, the hopper filter 20 that also is positioned at equipment floor level place sent into pulp pump again by this vane pump, and the paper pulp of reception flows to the horizontal K of paper machine therefrom and enters the hopper 22 of paper machine 24.
Fig. 2 illustrates the technical scheme that combines with the conventional white water tank 10 of prior art and use according to a preferred embodiment of the present invention.In the technical scheme according to this figure, three pipelines 40,42 are connected with white water tank 10 with 44, and each pipeline is introduced white water tank 10 with different fiber pulp.Each pipeline 40～44 is connected to its personal centrifugal purifier 46,48 and 50.Yet, must be pointed out the filtration possibility that centrifugal clarification is unique anything but, because novel filter-press preferably is provided with the cylinder of band slit, it is suitable for the last filtration of various paper pulp compositions fully.And people it should be noted that also and all described pipelines can be linked together, and thus various paper pulp are for example mixed in special blending tank earlier before entering white water tank, by the there raw material input one are used as in the so-called machine chest of surge tank.Certainly, this mixing needs suitable batching, and any technical staff that this batching is considered to this area is known generally, so do not describe in more detail in this article.In this embodiment of the present invention, each centrifugal purifier 46-50 is used to handle a kind of paper pulp of himself, therefore for example install 46 secondary stocks of handling from the waste paper pulper of paper machine, device 48 is handled the fiber pulp that reclaims and is installed 50 and handle new fiber pulp.It also shows the pump that combines with each centrifugal purifier, utilize these pumps that various paper pulp are sent in the white water tank 10 by each clarifier respectively.Yet described each pump can be positioned in technological process from the far place of each clarifier.Even can between pump and each clarifier, various treating apparatus be set.Adopt such setting, every kind of paper pulp can obtain best as far as possible processing, and in other words, so each clarifier can be selected and operate according to the optimum filtration of described various paper pulp.After each clarifier shown in the figure, this technological process can comprise and is used to handle every kind of needed various pans of paper pulp composition, pumping installations or other devices.And, the embodiment of this figure illustrates a filler treating apparatus, it comprise a mixing/distribution jar 56, one extender paste delivery pump 58, realize the centrifugal purifier 54 that filler filters and will filter after filler material be transported to pipeline 52 between white water tank 10 and the delivery pump 120.Such setting is guaranteed to have only real excessive filler particles to be excluded from filler material stream and or is excluded or for example returns dispersing stage fully from system.Thereby this technical scheme has prevented from still obviously to be thinner than sizable filler particles discarded of paper, and such discarding in the centrifugal clarification equipment of conventional prior art may be normal.As delivery pump 120, adopt a propeller pump, the head of its generation is enough when for example not having centrifugal clarification equipment to form flow resistance between pump 120 jars 16 separated from the gas at least.And aforesaid, this delivery pump can replace with the vacuum plant of gas separate pot in some cases, and this vacuum plant produces carries the needed pressure differential of paper pulp.
Fig. 3 illustrates the technical scheme according to the present invention's second preferred embodiment.It relates to a novel white water tank 100, it is located substantially on the machine level (major part of white water tank more than the surface of machine level and its horizontal plane obviously more than the surface of machine level) of paper machine, each fibre composition import in this jar via pipeline 40-44 and the liquid level of this jar at horizontal S
100The place.The white water tank 10 of this figure prior art shown in broken lines and delivery pump 12, white water tank 10 are positioned at the floor level of equipment and its liquid level at horizontal S
10The place.In some cases, liquid level S
100With S
10Between difference in height be several meters, be positioned at the wire netting pit paper machine wire netting part below situation under especially like this, so this difference in height can directly be calculated by the additive decrementation of pumping energy in being provided with of prior art.In addition, large-scale white water tank is in the time delay that causes himself in service of technological process.In the technical scheme of this figure, difference in height dh between the liquid level of the liquid level of white water tank 100 jar 16 separated from the gas is less than 9 meters, and preferably less than 6 meters, suitable is 2～4 meters, therefore, the head of pump 120 requires low to being enough to make it can adopt a propeller pump fully.
Must be pointed out that except above-mentioned points described the present invention though combine with the paper machine short circuit current journey that does not have centrifugal clarification equipment, this is a specific embodiment of the inventive method.In other words, method and apparatus of the present invention is applicable to that also its centrifugal clarification equipment is arranged in the short circuit current journey of traditional location.In the sort of embodiment, just lose some advantages, and these advantages can obtain when adopting fully according to embodiment of the present invention.However, employing can bring these tangible advantages according to propeller pump of the present invention in all purposes always suitable according to its application of proof.
As already pointed out, to research and develop the paper pulp that a kind of subtend paper machine carries and carried out pretreated new method, this method has been eliminated many defectives of prior art and shortcoming and has been solved the problem that the input system that hinders prior art is used.Yet must be pointed out that except that above-mentioned being described in each novel characteristics in each embodiment can independent utility and be only limited to them anything but above-described aspect those.
Claims (18)
1. the method for a pretreating paper pulp, utilize this method, all paper pulp or at least its major part by the delivery pump (12 of gas separate pot, 120) be admitted to the hopper (22) of also sending into paper machine in the gas separate pot (16) thus by vane pump (18) again, it is characterized in that paper pulp is admitted to gas separate pot (16) by screw impeller pump (12).
2. according to the paper pulp preprocess method of claim 1, it is characterized in that, before each composition that forms paper pulp is conveyed into gas separate pot (16), at least filler composition and fibre composition are processed so that remove impurity from described these compositions in its filtration stage separately respectively, afterwards described these compositions are mixed to form paper pulp.
3. according to the paper pulp preprocess method of claim 1, it is characterized in that the various fiber pulp that comprise in the paper pulp (for example VF, DIP, BR) are all processed in its filtration stage separately respectively.
4. according to the paper pulp preprocess method of claim 2 or 3, it is characterized in that adopting centrifugal clarification to handle at described filtration stage.
5. according to the paper pulp preprocess method of claim 2 or 3, it is characterized in that adopting filter-press at described filtration stage.
6. according to the paper pulp preprocess method of claim 1, it is characterized in that paper pulp directly is admitted to gas separate pot (16) and need not to adopt special purified treatment from white water tank (10) by screw impeller pump (12).
7. according to the paper pulp preprocess method of claim 1, it is characterized in that paper pulp is conveyed in the gas separate pot (16) from the white water tank (100) that is located substantially on the paper machine level.
8. equipment that is used for pretreating paper pulp, this equipment comprises the hopper (22) of delivery pump (12), a gas separate pot (16), a vane pump (18) and a paper machine of at least one gas separate pot, it is characterized in that, the delivery pump of described gas separate pot (16) is a screw impeller pump (120), by this screw impeller pump paper pulp is sent into gas separate pot (16) from white water tank (10) etc.
9. according to the equipment of claim 8, it is characterized in that this equipment comprises device that is used for the filter packing slurry and the device that is used for the filter fiber slurry in gas separate pot delivery pump (120) technological process order before.
10. according to the equipment of claim 9, it is characterized in that described extender paste filter comprises a centrifugal purifier (54).
11., it is characterized in that described fiber pulp filter comprises a centrifugal purifier (46,48,50) according to the equipment of claim 9.
12., it is characterized in that described fiber pulp filter comprises a filter-press according to the equipment of claim 9.
13., it is characterized in that described fiber pulp filter comprises the filter special-purpose separately to every kind of fiber pulp according to claim 9,11 or 12 equipment.
14. the equipment according to claim 11 or 12 is characterized in that, described fiber pulp filter all is arranged in technological process sequences before such as white water tank (10), and white water tank (10) etc. is positioned at again before the delivery pump of gas separate pot.
15., it is characterized in that described gas separate pot (16) is provided with the inlet pressure that is used for adjusting vane pump (18) and does not produce the device of overflow according to the equipment of claim 8.
16. the equipment according to claim 8 is characterized in that, white water tank (100) and delivery pump (120) are located substantially on paper machine level (K) and locate.
17. the equipment according to claim 16 is characterized in that, the liquid level difference in height between white water tank (100) jar separated from the gas (16) is not more than 9 meters.
18. the equipment according to claim 16 is characterized in that, the liquid level difference in height between white water tank (100) jar separated from the gas (16) is preferably less than 6 meters, and suitable is 2～4 meters.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI981798 | 1998-08-21 | ||
| FI981798A FI105489B (en) | 1998-08-21 | 1998-08-21 | Method and apparatus for pretreating paper pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1313917A CN1313917A (en) | 2001-09-19 |
| CN1134567C true CN1134567C (en) | 2004-01-14 |
Family
ID=8552339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB99809921XA Expired - Fee Related CN1134567C (en) | 1998-08-21 | 1999-08-18 | Method and apparatus for pretreating paper pulp |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP1121483B1 (en) |
| JP (1) | JP2002523642A (en) |
| KR (1) | KR20010072847A (en) |
| CN (1) | CN1134567C (en) |
| AT (1) | ATE260357T1 (en) |
| AU (1) | AU5374999A (en) |
| BR (1) | BR9913176B1 (en) |
| CA (1) | CA2340438C (en) |
| DE (1) | DE69915089T2 (en) |
| ES (1) | ES2214877T3 (en) |
| FI (1) | FI105489B (en) |
| WO (1) | WO2000011265A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102301067A (en) * | 2009-01-29 | 2011-12-28 | 沃依特专利有限责任公司 | Method And System For Producing A Fiber Web |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI122916B (en) | 2007-04-03 | 2012-08-31 | Andritz Oy | Device for degassing in connection with a paper machine or the like |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4219340A (en) * | 1978-12-14 | 1980-08-26 | Clark & Vicario Corporation | Method and apparatus for outflowing liquids from chamber maintained under vacuum |
| FI89728C (en) * | 1992-05-19 | 1993-11-10 | Pom Dev Oy Ab | PROCEDURE FOR THE CIRCULATION OF PROCESS VATTNET I EN PAPER MACHINERY |
| FI97332B (en) * | 1993-12-23 | 1996-08-30 | Pom Technology Oy Ab | Apparatus and method for pumping and separating a mixture of gas and liquid |
-
1998
- 1998-08-21 FI FI981798A patent/FI105489B/en not_active IP Right Cessation
-
1999
- 1999-08-18 JP JP2000566506A patent/JP2002523642A/en active Pending
- 1999-08-18 KR KR1020017002243A patent/KR20010072847A/en not_active Application Discontinuation
- 1999-08-18 DE DE69915089T patent/DE69915089T2/en not_active Expired - Lifetime
- 1999-08-18 WO PCT/FI1999/000684 patent/WO2000011265A1/en not_active Application Discontinuation
- 1999-08-18 AU AU53749/99A patent/AU5374999A/en not_active Abandoned
- 1999-08-18 EP EP99939465A patent/EP1121483B1/en not_active Expired - Lifetime
- 1999-08-18 BR BRPI9913176-5A patent/BR9913176B1/en not_active IP Right Cessation
- 1999-08-18 CA CA002340438A patent/CA2340438C/en not_active Expired - Fee Related
- 1999-08-18 ES ES99939465T patent/ES2214877T3/en not_active Expired - Lifetime
- 1999-08-18 AT AT99939465T patent/ATE260357T1/en active
- 1999-08-18 CN CNB99809921XA patent/CN1134567C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102301067A (en) * | 2009-01-29 | 2011-12-28 | 沃依特专利有限责任公司 | Method And System For Producing A Fiber Web |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1121483A1 (en) | 2001-08-08 |
| WO2000011265A1 (en) | 2000-03-02 |
| KR20010072847A (en) | 2001-07-31 |
| DE69915089D1 (en) | 2004-04-01 |
| FI105489B (en) | 2000-08-31 |
| CA2340438A1 (en) | 2000-03-02 |
| EP1121483B1 (en) | 2004-02-25 |
| FI981798A (en) | 2000-02-22 |
| BR9913176B1 (en) | 2009-05-05 |
| CA2340438C (en) | 2008-01-15 |
| DE69915089T2 (en) | 2004-09-09 |
| CN1313917A (en) | 2001-09-19 |
| FI981798A0 (en) | 1998-08-21 |
| ATE260357T1 (en) | 2004-03-15 |
| AU5374999A (en) | 2000-03-14 |
| ES2214877T3 (en) | 2004-09-16 |
| JP2002523642A (en) | 2002-07-30 |
| BR9913176A (en) | 2001-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1126839C (en) | Process arrangement for short circulation in paper or board machine | |
| CN101591085A (en) | A kind of wastewater treatment and reuse technology for paper mill | |
| CN101040081A (en) | Method for degassing and supplying a fibrous suspension to a headbox or a filter device, and degassing device | |
| CN1304119C (en) | Process for ball milling and water washing of waste iron and steel slag, slag slurry treatment process, and apparatus therefor | |
| CN1134567C (en) | Method and apparatus for pretreating paper pulp | |
| CN1919753A (en) | Treatment reuse technique for paper-making white-water | |
| CN110526535A (en) | A kind of dry row's technique of tailing circulation and stress | |
| NO178348B (en) | Method and apparatus for producing cellulose pulp with improved quality properties | |
| CN1167513C (en) | Flotation machine and method for improving flotation effect | |
| CN110694348B (en) | System and method for dissociating waste residues of papermaking coating | |
| EP2274471B1 (en) | A method for pulping waste paper | |
| CN114082245A (en) | Rinsing and purifying device and method for pentaerythritol | |
| CN1742134A (en) | Apparatus and method in the treatment of the stock passed to a headbox of a paper machine or equivalent | |
| CN210766163U (en) | Residue slurry recycling system for screening out of paper-making reconstituted tobacco pressure screen | |
| FI116078B (en) | Method of feeding pulp into an inlet box | |
| CN219290853U (en) | Reclaimed paper pulp sand removal system | |
| CN1730396A (en) | Technique for improving solid content of raw pulp | |
| CN212651473U (en) | Filter for producing 1-chloroformyl-3-methylsulfonyl-2-imidazolidinone | |
| CN218248693U (en) | Combined type multi-depth desanding device for organic garbage slurry | |
| CN107792994A (en) | A kind of textile printing and dyeing wastewater processing method | |
| CN1524621A (en) | Process and device for aerating suspensions | |
| CN214782901U (en) | White water treatment system | |
| FI83241B (en) | FOERFARANDE VID URVATTNING AV EN CELLULOSAFIBERSUSPENSION. | |
| CN220092190U (en) | Online separation device for coarse grains and fine powder of broken glass | |
| FI102302B (en) | Method and apparatus for producing cellulose pulp with improved quality properties |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1057792 Country of ref document: HK |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040114 Termination date: 20170818 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |