CN112411242B - Method and device for adjusting paper banner quantification by adding dilution water based on equivalent method - Google Patents
Method and device for adjusting paper banner quantification by adding dilution water based on equivalent method Download PDFInfo
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- CN112411242B CN112411242B CN202011155051.3A CN202011155051A CN112411242B CN 112411242 B CN112411242 B CN 112411242B CN 202011155051 A CN202011155051 A CN 202011155051A CN 112411242 B CN112411242 B CN 112411242B
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- 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
- D21F1/08—Regulating consistency
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- 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
- D21F1/02—Head boxes of Fourdrinier machines
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- 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
- D21F1/04—Head boxes of cylinder machines
Abstract
The invention discloses a method and a device for adjusting paper banner quantification based on an equivalent method by adding dilution water, wherein the method comprises the steps of firstly adding dilution water into pulp distribution branch pipes through a dilution water adding system according to the requirement of the paper banner quantification, and then adding clear water into the pulp distribution branch pipes through a clear water adding system, so that the sum of the added dilution water and the clear water in each pulp distribution branch pipe is equal, and the outlet flow of each pulp distribution branch pipe is equal. The device comprises a slurry inlet main pipe, a slurry distribution unit, a flow stabilizing chamber, a turbulence generator, a lip opening area, a dilution water adding system and a clear water adding system, wherein a plurality of slurry distribution branch pipes which are distributed in parallel are arranged in the slurry distribution unit, the outlet end of the dilution water adding system and the outlet end of the clear water adding system are respectively communicated with the slurry distribution branch pipes, and the outlet end of the dilution water adding system is positioned in front of the outlet end of the clear water adding system. The invention can effectively avoid the influence of the cross flow of the pulp flow in the pulp stabilizing chamber on the fiber orientation, the adjusting effect of the dilution water and the paper quality.
Description
Technical Field
The invention relates to the technical field of pulping and papermaking, in particular to a method and a device for adjusting the quantitative determination of a paper banner by adding dilution water based on an equivalent method.
Background
With the development of society and the improvement of living standard of people, the market puts forward higher and higher requirements on the quantitative distribution level of the banner of paper. Compared with the traditional method for quantitatively adjusting the cross-web of the head box, the method for controlling the full-web quantification by locally adjusting the concentration of the slurry has the advantages of accurate quantitative adjustment, high sensitivity, large amplitude of quantitative adjustment and correction deviation, capability of effectively adjusting the uniformity of the full-web transverse quantification, capability of keeping the uniformity of the full-web fiber arrangement, and the like, thereby being widely applied all over the world.
The working principle of controlling full-width quantification by locally adjusting the concentration of the slurry is as follows: the appropriate separation distance is selected along the cross direction of the headbox, and dilution water, usually papermaking white water, is injected into the headbox for locally adjusting the stock concentration to achieve full width cross direction quantitative uniform adjustment.
According to the principle, different methods and devices for adding dilution water are designed, wherein the most widely applied method is that the dilution water branch pipes are transversely and uniformly distributed along the flow box and are arranged among the pulp distribution branch pipes, the upper part of each dilution water branch pipe is connected with the dilution water header pipe, and the lower part of each dilution water branch pipe is connected with each pulp distribution branch pipe corresponding to each row of pulp distribution branch pipes. The dilution water from the dilution water header pipe enters the slurry distribution branch pipe through the dilution water branch pipe, and the flow of the dilution water is controlled through the adjusting valve to adjust the slurry concentration so as to adjust the banner quantification.
The method for changing the concentration of the pulp at the corresponding part by adjusting the flow rate of the dilution water has an obvious problem that the addition of the dilution water into the pulp distribution branch pipe of the pulp flowing box affects the flow rate of the outlet of the pulp distribution branch pipe, the more the dilution water is added, the larger the flow rate of the outlet of the pulp distribution branch pipe is, and in order to adjust the cross-width quantitative quantity of paper, the addition amount of the dilution water in most pulp distribution branch pipes is unequal, so that the outlet flow rate of each pulp distribution branch pipe is unequal, which inevitably causes the cross flow of the pulp after a pulp distribution unit, but does not have the basic requirement of the design of the pulp flowing box, in the pulp flowing box of the dilution water, the avoidance of the cross flow is more necessary, because the cross flow of the pulp after the pulp distribution branch pipe affects the adjusting effect of the dilution water, and simultaneously, the cross flow affects the fiber orientation in the pulp sprayed by the pulp flowing box. Therefore, the addition of dilution water in the dilution water headbox should minimize the effect on the outlet flow of the distribution manifold, so it is desirable that the addition of dilution water does not affect the outlet flow of the distribution manifold at all.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for adjusting the quantitative rate of a paper banner by adding dilution water based on an equivalent method, which can effectively avoid the influence of the cross flow of pulp flow in a pulp stabilizing chamber on the fiber orientation, the adjustment effect of the dilution water and the paper quality.
Another object of the present invention is to provide an apparatus for adjusting the web basis weight of paper based on the equivalent method of adding dilution water for implementing the above method.
The technical scheme of the invention is as follows: a method for adjusting the paper banner quantification by adding dilution water based on an equivalent method comprises the following steps:
(1) a set of dilution water adding system and a set of clear water adding system are arranged in a paper banner quantitative adjusting device;
(2) according to the quantitative requirement of the paper banner, firstly adding dilution water into the pulp distribution branch pipe through a dilution water adding system to ensure that the paper banner is quantitative and uniform;
(3) and then, adding clear water into the pulp distribution branch pipes through a clear water adding system to ensure that the sum of the amount of the diluted water added into each pulp distribution branch pipe is equal to that of the clear water, so that the outlet flow of each pulp distribution branch pipe is equal.
The dilution water is dilute white water containing slurry or concentrated white water with the concentration lower than that of the slurry in the slurry distribution branch pipe.
The clear water is water or diluent which does not influence the quantitative distribution of the paper.
The method comprises the steps of firstly adding required dilution water quantity into each pulp distribution branch pipe according to the quantitative requirement of the paper banner to ensure that the paper banner is quantitative and uniform, then adding clear water into the pulp distribution branch pipes, wherein the sum of the dilution water quantity added into each pulp distribution branch pipe is equal to the sum of the clear water quantity, so that the outlet flow of each pulp distribution branch pipe is equal, and the influence of pulp transverse flow in a pulp stabilizing chamber on fiber orientation, the adjustment effect of dilution water and the paper quality is avoided.
The invention relates to a device for adjusting paper banner quantification based on an equivalent method by adding dilution water, which is used for realizing the method. The slurry inlet main pipe can be a square cone main pipe or a cone main pipe, and is designed according to the Bayer equation, and the tail end of the slurry inlet main pipe is provided with a backflow. The slurry distribution unit is a tube bundle, consists of a plurality of slurry distribution branch pipes arranged in an array and is uniformly distributed along the transverse direction of the slurry box (namely the slurry flowing direction in the device). The turbulence generators can be composed of a plurality of reducing pipes which gradually transit from a round shape to a square shape and are also uniformly distributed along the transverse direction of the flow box. Along the flowing direction of the slurry, the dilution water adding system is arranged in front of the clear water adding system, namely close to the slurry inlet of the slurry distributing element, and the clear water adding system is arranged close to the middle of the slurry distributing element, so that the dilution water and the clear water are added in sequence in the method.
The dilution water adding system comprises a dilution water header pipe, dilution water branch pipes and dilution water regulating valves, wherein a plurality of dilution water branch pipes are distributed on the dilution water header pipe, the dilution water regulating valves are respectively arranged on the dilution water branch pipes, each dilution water branch pipe extends into one side of one row of pulp distribution branch pipes, and the row of pulp distribution branch pipes are connected into outlet ends of the dilution water branch pipes in parallel. The dilution water header pipe can be a square cone header pipe or a cone header pipe, is designed according to the Bayer equation, and does not return. The dilution water regulating valve adopts a linear valve, and the opening degree can be regulated in an electric regulation mode, a pneumatic regulation mode or a manual regulation mode, so that the addition amount of the dilution water is controlled. The dilution water branch pipes are round pipes and are uniformly distributed along the transverse direction of the flow box, the upper parts of the dilution water branch pipes are connected with the dilution water header pipe, the lower parts of the dilution water branch pipes extend into the slurry distribution unit, and each dilution water branch pipe is connected with one row of slurry distribution branch pipes. The dilution water used in the dilution water adding system can not adopt clear water, and must be dilute white water containing a certain pulp or concentrated white water with the concentration lower than that of the pulp in the pulp distribution branch pipe. The flow of the dilution water in each branch pipe of the dilution water is adjusted by a dilution water adjusting valve according to the quantitative distribution condition of the paper banner.
The clear water adding system comprises a clear water main pipe, clear water branch pipes and a clear water regulating valve, a plurality of clear water branch pipes are distributed on the clear water main pipe, the clear water regulating valve is arranged on each clear water branch pipe, each clear water branch pipe extends into one side of one row of pulp distribution branch pipes, and the row of pulp distribution branch pipes are connected in parallel to the outlet ends of the clear water branch pipes. The clear water main pipe can adopt a square cone main pipe or a cone main pipe, and is designed according to the Bayer equation without backflow. The clear water regulating valve adopts a linear valve, and the opening degree can be regulated in an electric regulation mode, a pneumatic regulation mode or a manual regulation mode, so that the addition amount of clear water is controlled. The clear water branch pipes are round pipes, are uniformly distributed along the transverse direction of the flow slurry box, the upper parts of the clear water branch pipes are connected with the clear water main pipe, the lower parts of the clear water branch pipes extend into the slurry distribution unit, and each clear water branch pipe is connected with one row of slurry distribution pipe bundles. The clear water adding system can adopt clear water, and can also adopt all liquids which do not influence the quantitative distribution of the paper, such as the diluent of chemicals such as reinforcing agents, coloring agents and the like.
In the slurry distribution unit, each slurry distribution branch pipe is simultaneously connected with the dilution water branch pipe and the clear water branch pipe, and along the flowing direction of slurry in the slurry distribution branch pipes, the dilution water branch pipe is in front, the clear water branch pipe is in back, and the dilution water branch pipe and the clear water branch pipe are respectively positioned at two sides of the slurry distribution branch pipe.
The number of the dilution water branch pipes is equal to the number of the clear water branch pipes.
The diameter of the clear water branch pipe is 1/3-1/2 of the diameter of the dilution water branch pipe.
The flow of the clear water branch pipe is equal to the difference of 1.05-1.1 times of the maximum flow of the dilution water branch pipe and the actual flow of the dilution water branch pipe corresponding to the clear water branch pipe.
When the method and the device for adjusting the paper banner quantification by adding the dilution water based on the equivalent method are used, the principle is as follows: by configuring two sets of water adding systems (namely one set of dilution water adding system and one set of clear water adding system), firstly, according to the quantitative requirement of the paper banner, the dilution water adding system adds the required dilution water amount in each pulp distribution branch pipe, and the paper banner is ensured to be quantitative and uniform. And then, the clear water adding system adds clear water into each pulp distribution branch pipe, the amount of the clear water in each pulp distribution branch pipe is adjusted according to the added dilution water amount, so that the sum of the dilution water amount added by each pulp distribution branch pipe and the clear water amount is equal, the outlet flow of each pulp distribution branch pipe is equal, and the influence of the cross flow of the pulp in the pulp stabilizing chamber on the fiber orientation, the dilution water adjusting effect and the paper quality is avoided.
Compared with the prior art, the invention has the following beneficial effects:
in the method and the device for adjusting the paper banner quantification by adding the dilution water based on the equal-quantity method, two sets of different water adding systems are configured to secondarily adjust the pulp, so that the outlet flow of each pulp distribution branch pipe is equal, thereby avoiding the influence of the pulp crossflow caused by adding the dilution water in the pulp stabilizing chamber on the fiber orientation, the adjustment effect of the dilution water and the paper quality and obtaining more stable paper quality.
The device for adjusting the paper banner quantification based on the addition of the dilution water by the equal-volume method is simple in structure, low in modification cost of the existing equipment and capable of being applied to the existing production equipment in a large range.
In the device for adjusting the paper banner quantification by adding the dilution water based on the equal-quantity method, the clear water adding system can adopt clear water and also can add liquid which does not influence the paper quantitative distribution basically, such as chemicals and dilution liquid, such as reinforcing agents, coloring agents and the like, so that the adding equipment of the chemicals is saved, and the equipment cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for adjusting the amount of a paper web by adding dilution water based on an equal amount method.
Fig. 2 is a cross-sectional view a-a of fig. 1.
Fig. 3 is a cross-sectional view B-B of fig. 1.
In the above figures, the components indicated by the respective reference numerals are as follows: 1 is a dilution water header pipe, 2 is a dilution water regulating valve, 3 is a dilution water branch pipe, 4 is a clear water branch pipe, 5 is a clear water regulating valve, 6 is a clear water header pipe, 7 is a slurry inlet header pipe, 8 is a slurry distribution unit, 8-1 is a slurry distribution branch pipe, 9 is a flow stabilizing chamber, 10 is a turbulence generator, and 11 is a lip region.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
The embodiment provides a device for adjusting paper banner quantification based on dilution water addition by an equivalent method, as shown in fig. 1, the device comprises a pulp inlet main pipe 7, a pulp distribution unit 8, a flow stabilization chamber 9, a turbulence generator 10, a lip region 11, a dilution water addition system and a clear water addition system, along the flow direction of pulp, the pulp inlet main pipe, the pulp distribution unit, the flow stabilization chamber, the turbulence generator and the lip region are sequentially connected, a plurality of pulp distribution branch pipes which are distributed in parallel are arranged in the pulp distribution unit, the outlet end of the dilution water addition system and the outlet end of the clear water addition system are respectively communicated with the pulp distribution branch pipes, the outlet end of the dilution water addition system is located on the pulp distribution branch pipes and close to the pulp inlet, and the outlet end of the clear water addition system is located on the pulp distribution branch pipes and close to the middle. The slurry inlet main pipe can be a square cone main pipe or a cone main pipe, and is designed according to the Bayer equation, and the tail end of the slurry inlet main pipe is provided with a backflow. The slurry distribution unit is a tube bundle, consists of a plurality of slurry distribution branch pipes arranged in an array and is uniformly distributed along the transverse direction of the slurry box (namely the slurry flowing direction in the device). The turbulence generators can be composed of a plurality of reducing pipes which gradually transit from a round shape to a square shape and are also uniformly distributed along the transverse direction of the flow box. Along the flowing direction of the slurry, the dilution water adding system is arranged in front of the clear water adding system, namely close to the slurry inlet of the slurry distributing element, and the clear water adding system is arranged close to the middle of the slurry distributing element, so that the dilution water and the clear water are added in sequence in the method.
As shown in fig. 1, the dilution water adding system includes a dilution water header pipe 1, dilution water branch pipes 3 and dilution water regulating valves 2, the dilution water header pipe is distributed with a plurality of dilution water branch pipes, each of which is provided with a dilution water regulating valve, as shown in fig. 2, each of the dilution water branch pipes extends into one side of a row of slurry distributing branch pipes 8-1, and the row of slurry distributing branch pipes are connected in parallel to the outlet ends of the dilution water branch pipes. The dilution water header pipe can be a square cone header pipe or a cone header pipe, is designed according to the Bayer equation, and does not return. The dilution water regulating valve adopts a linear valve, and the opening degree can be regulated in an electric regulation mode, a pneumatic regulation mode or a manual regulation mode, so that the addition amount of the dilution water is controlled. The dilution water branch pipes are round pipes and are uniformly distributed along the transverse direction of the flow box, the upper parts of the dilution water branch pipes are connected with the dilution water header pipe, the lower parts of the dilution water branch pipes extend into the slurry distribution unit, and each dilution water branch pipe is connected with one row of slurry distribution branch pipes. The dilution water used in the dilution water adding system can not adopt clear water, and must be dilute white water containing a certain pulp or concentrated white water with the concentration lower than that of the pulp in the pulp distribution branch pipe. The flow of the dilution water in each branch pipe of the dilution water is adjusted by a dilution water adjusting valve according to the quantitative distribution condition of the paper banner.
As shown in fig. 1, the clear water adding system comprises a clear water main pipe 6, clear water branch pipes 4 and a clear water regulating valve 5, wherein a plurality of clear water branch pipes are distributed on the clear water main pipe, and each clear water branch pipe is respectively provided with a clear water regulating valve, as shown in fig. 3, each clear water branch pipe extends into one side of a row of pulp distribution branch pipes 8-1, and the row of pulp distribution branch pipes are connected in parallel to the outlet ends of the clear water branch pipes. The clear water main pipe can adopt a square cone main pipe or a cone main pipe, and is designed according to the Bayer equation without backflow. The clear water regulating valve adopts a linear valve, and the opening degree can be regulated in an electric regulation mode, a pneumatic regulation mode or a manual regulation mode, so that the addition amount of clear water is controlled. The clear water branch pipes are round pipes, are uniformly distributed along the transverse direction of the flow slurry box, the upper parts of the clear water branch pipes are connected with the clear water main pipe, the lower parts of the clear water branch pipes extend into the slurry distribution unit, and each clear water branch pipe is connected with one row of slurry distribution pipe bundles. The clear water adding system can adopt clear water, and can also adopt all liquids which do not influence the quantitative distribution of the paper, such as the diluent of chemicals such as reinforcing agents, coloring agents and the like.
In the slurry distribution unit, each slurry distribution branch pipe is simultaneously connected with the dilution water branch pipe and the clear water branch pipe, and along the flowing direction of slurry in the slurry distribution branch pipes, the dilution water branch pipe is in front, the clear water branch pipe is in back, and the dilution water branch pipe and the clear water branch pipe are respectively positioned at two sides of the slurry distribution branch pipes. The number of dilution water branch pipes is equal to the number of clear water branch pipes. The diameter of the clear water branch pipe is 1/3-1/2 of the diameter of the dilution water branch pipe. The flow of the clear water branch pipe is equal to the difference of 1.05-1.1 times of the maximum flow of the dilution water branch pipe and the actual flow of the dilution water branch pipe corresponding to the clear water branch pipe.
When the device for adjusting the paper banner quantification by adding dilution water based on the equivalent method is used, the principle is as follows: by configuring two sets of water adding systems (namely one set of dilution water adding system and one set of clear water adding system), firstly, according to the quantitative requirement of the paper banner, the dilution water adding system adds the required dilution water amount in each pulp distribution branch pipe, and the paper banner is ensured to be quantitative and uniform. And then, the clear water adding system adds clear water into each pulp distribution branch pipe, the amount of the clear water in each pulp distribution branch pipe is adjusted according to the added dilution water amount, so that the sum of the dilution water amount added by each pulp distribution branch pipe and the clear water amount is equal, the outlet flow of each pulp distribution branch pipe is equal, and the influence of the cross flow of the pulp in the pulp stabilizing chamber on the fiber orientation, the dilution water adjusting effect and the paper quality is avoided.
Example 2
The embodiment of the invention relates to a method for adjusting the amount of a paper banner based on an equivalent method by adding dilution water, which is realized by the device in embodiment 1, and comprises the following steps:
(1) a set of dilution water adding system and a set of clear water adding system are arranged in a paper banner quantitative adjusting device;
(2) according to the quantitative requirement of the paper banner, firstly adding dilution water into the pulp distribution branch pipe through a dilution water adding system to ensure that the paper banner is quantitative and uniform;
(3) and then, adding clear water into the pulp distribution branch pipes through a clear water adding system to ensure that the sum of the amount of the diluted water added into each pulp distribution branch pipe is equal to that of the clear water, so that the outlet flow of each pulp distribution branch pipe is equal.
Wherein the dilution water is dilute white water containing the pulp or concentrated white water with the concentration lower than that of the pulp in the pulp distribution branch pipe. The clear water is water or diluent which does not influence the quantitative distribution of the paper.
The method comprises the steps of firstly adding required dilution water quantity into each pulp distribution branch pipe according to the quantitative requirement of the paper banner to ensure that the paper banner is quantitative and uniform, then adding clear water into the pulp distribution branch pipes, wherein the sum of the dilution water quantity added into each pulp distribution branch pipe is equal to the sum of the clear water quantity, so that the outlet flow of each pulp distribution branch pipe is equal, and the influence of pulp transverse flow in a pulp stabilizing chamber on fiber orientation, the adjustment effect of dilution water and the paper quality is avoided.
As mentioned above, the present invention can be better realized, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present disclosure are intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A method for adjusting the paper banner quantification based on an equivalent method by adding dilution water is characterized by comprising the following steps:
(1) a set of dilution water adding system and a set of clear water adding system are arranged in a paper banner quantitative adjusting device;
(2) according to the quantitative requirement of the paper banner, firstly adding dilution water into the pulp distribution branch pipe through a dilution water adding system to ensure that the paper banner is quantitative and uniform;
(3) and then, adding clear water into the pulp distribution branch pipes through a clear water adding system to ensure that the sum of the amount of the diluted water added into each pulp distribution branch pipe is equal to that of the clear water, so that the outlet flow of each pulp distribution branch pipe is equal.
2. A method for adjusting sheet cross-web basis weight based on the equivalent method of adding dilution water according to claim 1, characterized in that the dilution water is dilute white water containing stock or concentrated white water having a lower concentration than the stock in the stock distribution branch.
3. The method of claim 1, wherein the clean water is water or a diluent that does not affect the quantitative distribution of the paper.
4. A device for adjusting the paper banner quantification based on the dilution water addition method is characterized by comprising a pulp inlet main pipe, a pulp distribution unit, a flow stabilization chamber, a turbulence generator, a lip area, a dilution water addition system and a clear water addition system, wherein the pulp inlet main pipe, the pulp distribution unit, the flow stabilization chamber, the turbulence generator and the lip area are sequentially connected along the flow direction of pulp; and adding clear water into the pulp distribution branch pipes through a clear water adding system to ensure that the sum of the amount of the diluted water added into each pulp distribution branch pipe is equal to that of the clear water, and the outlet flow of each pulp distribution branch pipe is equal.
5. The apparatus according to claim 4, wherein the dilution water adding system comprises a dilution water header pipe, a plurality of dilution water branch pipes and dilution water regulating valves, the dilution water header pipe is distributed with the plurality of dilution water branch pipes, each of the dilution water branch pipes is provided with a dilution water regulating valve, each of the dilution water branch pipes extends into one side of a row of pulp distribution branch pipes, and the row of pulp distribution branch pipes are connected in parallel to outlet ends of the dilution water branch pipes.
6. The apparatus according to claim 5, wherein the fresh water adding system comprises a fresh water main pipe, a fresh water branch pipe and a fresh water regulating valve, the fresh water main pipe is distributed with a plurality of fresh water branch pipes, each fresh water branch pipe is respectively provided with a fresh water regulating valve, each fresh water branch pipe extends to one side of a row of pulp distribution branch pipes, and the row of pulp distribution branch pipes are connected in parallel to the outlet ends of the fresh water branch pipes.
7. The apparatus of claim 6, wherein each of the stock distribution branches is connected to both the dilution water branch and the fresh water branch, and the dilution water branch is located at the front, the fresh water branch is located at the rear, and the dilution water branch and the fresh water branch are located at both sides of the stock distribution branch respectively.
8. The apparatus of claim 6, wherein the number of branch dilution water lines is equal to the number of branch clean water lines.
9. The apparatus for adjusting the banner weight of paper based on the equal amount method as claimed in claim 6 wherein the diameter of the clear water branch pipe is 1/3~1/2 of the diameter of the dilution water branch pipe.
10. The apparatus for adjusting sheet banner ration based on the equal amount method for adding dilution water according to claim 6, wherein the flow rate of the clear water branch pipe is equal to 1.05-1.1 times of the maximum flow rate of the dilution water branch pipe minus the actual flow rate of the dilution water branch pipe corresponding to the clear water branch pipe.
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI115645B (en) * | 1997-01-14 | 2005-06-15 | Metso Paper Inc | Paper machine inlet box with edge feeding arrangement |
| FI103420B1 (en) * | 1998-06-08 | 1999-06-30 | Valmet Corp | Control system for the head box in a paper-making machine/cardboard machine |
| FI113672B (en) * | 1999-04-28 | 2004-05-31 | Metso Paper Inc | Method and apparatus for mixing a diluent with a stock flow in a paper machine or board machine |
| FI105407B (en) * | 1999-05-27 | 2000-08-15 | Valmet Corp | Inlet box in a papermaking machine or cardboard making machine |
| EP1496150A1 (en) * | 2003-07-09 | 2005-01-12 | Voith Paper Patent GmbH | Headbox |
| CN100400745C (en) * | 2006-07-07 | 2008-07-09 | 华南理工大学 | Device for roughly regulating or fine adjustment for paper banner through adding diluent water |
| CN105755887B (en) * | 2016-04-29 | 2018-06-29 | 华南理工大学 | A kind of paper cross direction ration regulating device and method |
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