FI117477B - strainer body - Google Patents

Abstract

A central screen element being located substantially parallel with the vertical axis of a pulp digester is provided. In the vertical direction, the screen element comprises at least one zone including one screen segment for removing a liquid stream from the digester and at least one outlet for introducing a liquid stream to the digester. The zones may be adjacent or separated and liquid streams may be independently removed and introduced, as required by the properties and the stage of the cooking process. A screen element may be used in both continuous and batch digesters.

Description

117477 '·> 1' ^

Engineering

The present invention relates to a strainer arrangement of a digester, more particularly to a screen member disposed substantially vertically in the center of the digester, through which a process chemical can flow simultaneously into or out of the digester, depending on process specifications and process step. In particular, it is used for feeding process chemicals to and from the digester when making pulp or paper pulp from wood chips in a batch or continuous digester.

Prior art

In the prior art, the process chemical is moved with respect to the substance to be treated, e.g., when making pulp by boiling wood chips with a sieve with openings in the inner surface of the process vessel allowing the chemical to flow through the sieve surface. The chemical flow can; in the prior art, to move inward or outward of the container and the substance to be treated, e.g.

The wood chips can be in place or in motion in any direction, depending on the need.

Nowadays, chemically produced pulp must be both strong and have a low kappa number, i.e. low lignin content after cooking. To achieve these • · t t .111 both features must be carefully optimized for the cooking conditions. These cooking conditions • · · * 1 'include proper alkali distribution, a suitable temperature profile, sufficient liquid volume and * 1 · minimized undesirable gradients, especially for continuous operation. in the radial direction of the digester. This requires high recycling and expansion flows.

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Even partial clogging of, for example, expansion and recycling strainers causes ductwork and disturbed flows in the digester. Therefore, it is not always possible * • · · 1 .2 ·. maintains cooking conditions such that the resulting mass is firm, clean, and * · • 1 1 homogeneous. This leads to increased consumption of raw materials, energy and chemicals, 1 which in turn increases production costs and environmental load.

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As a result of clogging, the strainers can also break when support structures fail.

Generally speaking, this necessitates the renewal of the strainers.

The strainers on the market today in continuous cooking usually consist of a series of vertical bar strainers arranged, for example, in a chessboard-like manner and fixed at a position justified by process technology on the inside surface of the digester. The screen bars of the bar strainers are angular in shape, for example, a metal bar that is machined to the shape of a T-beam or round. Such screening structures are disclosed, for example, in WO94 / 19533 and WO 01/31117.

The location on the inside of the kettle is very traditional.

Similarly, in continuous cooking, one problem with known, in-use strainers is that they are easily clogged when the chips are stuck in the crevices. When the stream of process chemicals absorbs chips, sticks, and pre-boiled pulp against the screens, this and the radial component of chip pillar pressure produce a resultant force that wedges particles in the strainer slots and agglomerates from the bottom up, causing stenosis and obstruction to flow. When the digester has a normal degree of compression, the wood chips adhere to one another within the plug stream and partly at the edges of the plug stream. Small sticks: *** · and chip particles follow a faster radial fluid flow and stick to the sharp edges • of the screen bars. These sticky particles are more easily adhered to by new sticks • and chip particles, causing a wider screen surface clogging. Clogging: ***: Increases continuously with decreasing screen area. Due to heavy blockage • · ·.

··· Flows also slow down on the back of the screen (between the screen and the digester jacket), resulting in heavier particles moving to the rear of the screen and blocking the flow range between the screen and the screen. Due to the location and clogging of the strainers, T is difficult to clean and every effort is made to avoid, for example, by changing the design types of the · · ·: strainers to the same previous location on the inside of the digester,:

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Solutions have recently been developed to prevent clogging, for example by changing the direction of the screening slits, as disclosed in WO95 / 16817, US 6,039,841, US A

6,344,112; and US 6,165,323. FI 54509 and FI 105 931 disclose methods for cleaning strainers.

Problems with proper alkali distribution, suitable temperature profile, sufficient fluid volume and optimal flow conditions still exist and no solution has been sought by positioning the strainers e.g. in the center of the digester. However, it is clear that optimizing the above conditions can also reduce strain on the strainers.

One of the biggest problems is to distribute the process chemical evenly throughout the chip without disturbing the flows. In a continuous digester, wood chips are fed from the top of the digester and the resulting pulp is discharged from the bottom of the digester.

The cooking chemical is fed through a longitudinal central tube installed in the center of the digester to various areas within the digester as defined by the process technology. However, the flow direction is traditionally from the center of the digester towards the digester casing where the screens are. Typically, additional screening capacity is built into the digester jacket.

U.S. Patent 3,475,271 discloses a kettle specifically for sawdust. In this invention, ··· · '· 1 2; a rotating central strainer is placed just near the bottom of the digester. The sieve may be cylindrical or conical in shape with increasing cone diameter: 3; in the direction of the plug flow. The washing liquor is fed into the digester via strainers on the walls of the pressure vessel * 1 1 ··· and flows towards said central strainer, through which it · «« · exits the circulation. This solution is intended to provide a horizontal * · · blast wash at the bottom of the digester. However, problems arise with the position of the center screen relative to the point of application of the wash solution. Off the wall of the digester toward the central screen: j the velocity of the current flowing increases as the flow area decreases. Similarly; radial force vector towards the sieve in the middle of the digester grows rapidly, up to 1 1 ·. ···. at low liquor flow rates. As a result, the · · ·, · disclosed in U.S. Patent No. 3,475,271. a central strainer may clog easily. The limited possibilities of structure • · · «· · ', • · I'.

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2 • · · 3 ♦ · 117477 4 its weaknesses. In addition to the suction, only back flushing is possible. The solution is a traditional one.

In the conventional batch cooking method, the machine is filled with chips and cooking chemical. Subsequently, the contents of the digester are heated by circulating the chemical in a pump and heating it in a heat exchanger in a circulating pipe. In this method of cooking, only one sieve (litter screen) is mounted on the bottom of the kettle on the inside of the jacket. The position of the sieve is disadvantageous in order for the soup to quickly become uniform, e.g. cooking time is wasted.

In a more advanced batch cooking method, the heat content of the previous soups is recovered in subsequent soups. This is done by displacing the hot cooking chemical from the digester with a cooler and cleaner liquid. The hot liquid displaced from the digester is used partly as a cooking chemical for subsequent soups and partly for heating a new cooking chemical in heat exchangers. Such digesters typically require a second screen in addition to the above-mentioned recycling strainer in order to carry out the necessary displacements. Typically, these so-called. the displacement strainers are mounted at the top of the digester on the inside surface of the jacket. The displacement batch cooking method is significantly more energy efficient than the conventional batch cooking method and allows the production of; ***: better quality pulp. As a result, it has become more common and there is a need for * * * · * · *; to make existing conventional batch cooking methods like this.

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First of all, since the strainers are only on the inside of the container, it is difficult to get the chemical evenly distributed over the chips in the container. As a result, the quality of the · · «product obtained by the method is easily uneven. Secondly, because the flow of process chemicals occurs throughout the sieve area, the flow may change uncontrollably as individual chips of the chips to be treated move during cooking, for example due to settling.

1 * 1: Thirdly, such process vessels and typically still pressurized process vessels: wall mounted screen structures are expensive. However, the capacity of the cooker • · · t. ***. increasing the screen area is necessary. And fourthly, if the process * /.

To improve the retrofitting of the strainer, it becomes difficult, expensive, and slow to install a strainer of the known type into the finished process vessel.

The object of the invention is to eliminate the drawbacks presented in both cooking methods by using a central screen element to which the flow of the process chemical can be directed to a desired position either inwards and / or outwards and which can be easily retrofitted inside the process vessel.

Objectives and Brief Description of the Invention

The problems encountered in the prior art can be eliminated in accordance with the invention by making a tubular strainer having one or more zones in the longitudinal direction. Each zone comprises a screen section through which process chemical can be aspirated from the digester and at least one outlet through which the chemical is fed to the digester. The zone can also be called a screening zone. In the transverse direction, there must be at least two channels in the central sieve for each zone, which allows the process chemical to flow in different directions at the same time. The strainer is mounted inside the process vessel in the middle substantially parallel to the vertical axis.

Such a screening member mounted in the center of the digester increases the screening area of the digester, improving screening capacity. Multi-zone screening element combined with multi-channel • · · "· 1; enables optimization of process chemical input and output for better cooking • · · 2 · .. In general, optimization of input and output means that the chemical can be fed in the longitudinal direction of the digester, and also in the center of the · · · ··· boiling chips column, ensuring that · · 2 process chemicals are sufficient and evenly distributed throughout the chips pile on the other hand, the inlet and outlet streams affect chip movements and and by adjusting the position of the outlets, the flow conditions that are best suited to each cooking stage are achieved, which contributes to the quality and uniformity of the mass:.

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The following figures are intended only to illustrate preferred embodiments of the invention and are not intended to limit the scope of the invention.

Brief Description of the Drawings

Figure 1. One embodiment of the structure of a central screen member according to the invention

Figure 2. One embodiment of positioning the screening zones of the central screening member in the longitudinal direction of the screening member.

Figure 3. Operation of the central strainer according to the invention during the campaign run of the continuous digester.

Figure 4. A sputtering stove with a central sieve member according to the invention. -

Detailed Description of the Invention

The central screen member according to the invention can be implemented in a number of different constructions.

The following device descriptions are intended to clarify the structure and function of the screen member. They do not in any way limit the scope of the patent as set forth in the claims.

The sieve member is tubular in shape and has a height greater than the diameter.

In this context, the tubular form refers to a '' part of a machine '' in which space for fluid flows is followed · · · · · t * 'existing and future cookers are so-called. tailored to the customer, so also the central screening member according to the invention must be dimensioned individually for each cooker to best suit the design and operating conditions of the device in question. The central screening member will be • · * *! " take into account the size of the digester, existing screen structures, capacity of the digester, pipe connections and connections to it, and any other special features of the digester.

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The central screening member is longitudinally divided into one or more screening zones.

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The number, size, and location of the sieve zones relative to the size of the central strainer is dependent on the digester in which the strainer is installed and the cooking method used, as well as * ♦ * ··· * process specifications. The sieve zones may be located in the central sieve member of each other «m m 9 • · · · / 117477 '. . 7 in a region within the range of the intended cooking and / or other zone. Also, the elements of the screening zone, the screening block and at least one outlet, may be located in the zone in close proximity to one another or at a distance from each other. The outlet may also be located in the area of the screen block, behind the screen bars, in the flow state. The screen zones allow the process chemical to be fed to and removed from the digester at optimum locations, thereby supporting the operation of existing screens on the digester casing. The central screening element adds more screening area to the digester, thereby increasing the screening capacity of the digester and additionally.

controlling the flows inside the digester and thereby improving the quality of the pulp being produced.

In the transverse cutting direction, the central sieve member is divided into two or more channels.

The channels are intended to allow fluid streams containing process chemicals to flow in and out of the central screen simultaneously without disruption. In order for currents to flow in different directions simultaneously, currents in different directions must have their own channels. Therefore, there must be at least two channels per zone of the central screening member. It is possible that the number of outputs in the zone is more than one, for example two. This enables correct alkali distribution under changing cooking conditions. Conventional back flushing of screening blocks is also possible. ···, possible. ”• · • * · · * · a · · ...

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The same idea of the central strainer can be utilized in both cooking methods, that is, *, ***. both batch and continuous cooking. In both methods, there is a continuous movement of boiling wood chips from the top of the digester towards the bottom. In batch cooking this is • · ·. ***. as a result of settling and compaction of the resulting mass towards the bottom of the digester. So if we look at a single boiling chip, it is in continuous motion ... downwards. The speed of movement of the chip during cooking is relatively slow and its movement ··· · ***: the distance is short but the movement is continuous. There is considerable movement in continuous cooking. faster as the process involves feeding new wood chips from the top of the digester • * · [II. [and entering the resulting pulp from the bottom as a continuous operation during cooking.

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Also in continuous cooking, when the wood chips are boiling, the mass of condensed pulp condenses towards the bottom of the digester.

Although the movement is of varying speeds and is caused, at least for the most part, by a different factor, it is, however, quite significant in both cooking methods. As a result of the movement, high demands are placed on the operation of the strainers and the flows of the digester.

They should be able to function optimally throughout the cooking process, even if the cooking conditions change. Prior art solutions are not sufficiently capable of adapting to changing circumstances. The solution of the present invention is capable of taking into account both the demanding, changing conditions of the screens and the flows.

Fig. 1 is an exemplary vertical cross-sectional view of a central screen member according to the invention and a transverse section X-X of the same center screen member. In this example case, the screen member is divided longitudinally into two screen zones (A) and (B) and transversely into five channels (streams 1, 2, 3, 4 and 5). As shown in the figure, the flow to the digester can occur at three locations, the outputs (1.1), (2.1) and (3.1) and the flows (1), (2) and (3), respectively.

The flow out of the digester may be from two separate; ***: process chemical streams (5) and (4) leaving the screening zone (A) and (B) through the screening blocks (5.1) and (4.1), respectively. To improve cooking smoothness: • · To compensate for chip pile movements and reduce clogging, flows: in and out can be routed through different channels independently of each other as required by changing cooking conditions. The flow can be directed to one or more * 1 1 1 ^ zones at a time. in or out of the zone is led through a channel through the upper zone in the axial direction of the central screen member.

..1 · 1 The chemical can thus be fed into the digester simultaneously, for example, at all three ··· points, outlets (1.1), (2.1) and (3.1) and removed through both screening blocks (4.1) and (5.1). However, when the cooking conditions so require, only one of the sieve blocks (4.1) or (5.1) may be used, for example. All different combinations are possible thanks to ♦ · · separate channels. In batch cooking, for example, as a result of mass squeezing, the supply of chemical via outlet (3.1) is terminated as the upper surface of the chip pillar passes through the outlet of the central sieve (3.1). On the other hand, in the final stage of the cooking process, the feed of the chemical through the outlet (1.1) is increased to reduce the condensation of the pulp by diluting e.g.

The central screen member according to the invention can be installed either in a new digester or retrofitted in an old digester. The sieve member is mounted in the digester substantially centrally to the vertical axis. The center sieve member is mounted in the digester substantially parallel to the central axis of the digester so that the distances traveled by the radial currents are symmetrical and equal in distance to the boiling chip pillar.

The center strainer is mounted inside the digester, following the support so that the support interferes as little as possible with the cooking process. The support can be placed anywhere on the machine and, if necessary, the support may also need to be provided at several different locations. Preferably, the center screen member is secured to the digester at the top of the digester and, if necessary, lateral support also to the bottom of the screen member. It is particularly important to provide support for the central strainer in a batch digester, where, in the case of chipping and absorption liquor filling, the chips pillar may move upward and break structures. The connection of the central strainer to the fluid circulation is preferably carried out: ***; from the top of the screen. For this purpose, when installing the strainer in an old digester, • ♦ * existing pipe connections must be taken into account when designing and dimensioning the appliance.

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The central screening member can be made of any suitable material, such as austenitic and phenylene-austenitic steels.

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The screening section of the screening zone may be a rotary bar screen (as disclosed in WO01 / 31117), which is flow-efficient and would significantly increase the hydraulic capacity of the screen. On the other hand, other possible structures which implement the features of the invention are within the scope of the invention. The screening element can be implemented with, for example, a perforated plate or a Slit plate. The choice is often based on several * * * 'criteria, including: at the cost of.

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Fig. 1 is a transverse cross-sectional view X-X of one embodiment of the channel structure of a central screen member according to the invention. Other duct structures, for example tubular structures, capable of directing flows to and from different zones of the central screening member are possible and are within the scope of the invention. In this context, the duct refers to the structure allowing the flow of the process chemical within the central tubular sieve member. Multichannel refers to a duct structure that enables process chemical flows in different directions at the same time. For example, when the screening zones are spaced apart, it is economical to track the flows of the fluid paths in the standard tubes through portions of the screening zones in the central screening member. . ;

Figure 2 illustrates one embodiment of the invention of a central sieve member in a continuous cooker. The center screen member of Figure 2 has four screening zones, zones A, B, C, and D. The screening zones are located both in succession (A and B) and spaced apart (C and D).

Figure 3 illustrates the operation of the central screening member according to the invention in the campaign run of a continuous cooker, whereby, for example, softwood and hardwood chips are run alternately.

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Cooking coniferous chips (upper photo): • ·

Conventional radial bias current (6), output (6.1), as is conventional; ***. from the center tube, flowing radially to the washing cycle screen mounted on the kettle jacket ·· ♦ ··· (7). The washing liquor displaces the dirty cooking liquor from the plug flow.

·· ** In this example, due to the increased production capacity of the digester ···, the screen capacity of the diaper becomes low and interferes with the operation of the digester.

···· · • Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl Jäl to increase screening capacity. Adjusted pressure differential across the screening screen sieve »* * * * * *

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117477 provides that part of the flow (6) can be sucked out of the plug flow as the flow (5) through the screen section (5.1).

When the pressure differentials over the conventional screened screen (7) and the screen section (5.1) are proportional to each other, the radial flow (6) for both screens is dispersed and the plug flow as a whole is better purified. The position of the screen block (5.1) slightly below the screen screen (7) contributes to the dispersion of the radial flows.

The bottom diluent units (8) and (9) operate in a conventional manner to adjust the consistency of the butt.

Cooking hardwood chips (lower image):

The conventional radial jet stream (6) flows radially from the outlet (6.1), such as traditionally from the center tube, to the washer screen (7) mounted on the digester casing. The washing liquor displaces the dirty cooking liquor from the plug flow.

When hardwood is cooked in a continuous cooker and capacity is increased beyond the model production of the digester, the following problems arise, especially in the washing cycle of the digester: a) strong packing in the bottom of the digester and b) high: density of cooked chips on screen surfaces, about 100mm to 200mm '1 per central axis. The harder the pressure difference across the strainer, the worse the density and the worse the filterability.

In order to achieve production objectives, under the conditions defined by another wood quality (now hardwood) • 1 2, traditional radial flow (6), outlet (6.1), for example, two radial flows (2), outlet ( 2.1) and (3), the output (3.1), ..1 · 2, and the upper screening zone (B) and the lower zone (A) of the center screen element are activated to simultaneously increase the screening capacity. .

a: ·: ·: · Maximum screen capacity allows a smaller differential pressure to be applied to the same • 1 ·, V. to displace fluid volumes from the plug stream.

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· 2 «· · 3 * · 117477 12

The strongest of the radial currents is the conventional (6), the outlet (6.1) and supported by the smaller radial currents (3), the outlet (3.1) and the flow (2), the outlet (2.1). The differences between the flow rates and the pressure differences across the screen surface between the different screen surfaces, the screen screen (7) and the screen blocks (4.1) and (5.1) are adjusted so that the plug flow is cleaned as efficiently as possible.

For example, in a problem situation, the flow (4) to the screen block (4.1) and the flow (5) to the screen block (5.1) can be enhanced to close the radial currents (3), outlet (3.1) and (2), outlet (2.1) to eliminate problems caused by strong packaging.

Alternatively, the flow (4) to the screen block (4.1) and the flow (5) to the screen block (5.1) as well as the radial flows (3), output (3.1) and (2), output (2.1) can be alternately rhythmically or programmed alternately.

The radial flow (1) from the outlet (1.1) is suitable for adjusting the consistency of the bottom of the digester in addition to the conventional dilution lines (8) and (9).

If it is desired to provide a slightly countercurrent soup force to the bottom of the digester below the washing cycle screens to lighten the bottom packing, the radial flow (1) from the outlet (1.1) can be utilized without disturbing other operations. Only the pressure between the screens (7) and the screening blocks (4.1) and (5.1)! ! differences over the sieve should be adjusted to the conditions. The radial flow (1) from the outlet (1.1) must be forced to flow upwards towards the descending plug flow and towards the screen (7).

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Figure 4 illustrates one embodiment of the invention in the use of a centrifugal filter element in batch cooking. Wood chips are fed into the digester from the top of the digester. The chip filling vapor released from the nozzles located at the top of the digester • * · is evenly sprinkled and • packed in the digester. The process chemical is fed into the digester via the · · ♦ · bottom section (16). As a result of the addition of process chemicals, the air supplied by the chips * · · is removed from the digester by means of the pipe connections (17) at the top of the digester and / or the screening blocks (4.1) and (11). 5.1). During cooking, some of the lye is removed from the digester and replaced with a new chemical. Through the central screening member according to the invention, the lye can be removed at the desired point of the digester via the screening blocks (4.1) and / or (5.1).

During cooking, the process chemical is circulated so that it exits the digester either through strainers (10) attached to the digester jacket (10) or through screen blocks (4.1) and (5.1) in the central screen (11) and flows back into the digester either at the bottom (12). ) or to the top of the digester (13) and / or through the central screen (11) to the desired position of the digester via the outputs (1.1), (2.1) and / or (3.1) as streams (1), (2) and / or (3)

Thus, the central screen member of the invention allows the chemical to be discharged at several points in the digester simultaneously. The recovery of the process chemical in the batch digester of the invention can also be done at multiple locations in the digester, thereby allowing the process chemical to be evenly distributed throughout the pulp column while at the same time reducing the loss of pulp to the bottom of the digester.

When the soup is finished, that is, the kappa number of the pulp is compliant in the displacement batch soup, the hot liquor is replaced by a cooler and cleaner liquor.

In the batch digester according to the invention, which is equipped with a sifting liquid which displaces the central sieve, it can also be fed through the outlets (1.1), (2.1) and / or (3.1), as streams (1), (2) and / or (3). In this way, exclusion can be controlled more closely, e.g.

reduce overhead stiffening caused by a long period of displacement. The sputtered liquor is discharged through the displacement screens (14) mounted on the upper part of the digester and / or: ***: through the screening sections (4.1) and / or (5.1) of the central screen, in streams (4) and / or (5). To the bottom ·· I * ·· the press and to extract the cooked mass from the digester, you must enter »·« 4:! as dilution. In the solution according to the invention, liquor can be fed either through the nozzles (15) located in the lower part of the digester or from the outlet (1.1) of the central strainer, as a flow (1) or both.

.. * · * If the cooking conditions with respect to the wood raw material and process engineering specifications are such that the chip pile is strongly depressed as the cooking proceeds, the top output (3.1) and the top screen section (11) 4.1) off «··; ***; because they would work in gas mode.

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One embodiment of the invention is that a conventional batch cooker is converted to an ignition batch cooker by installing a central sieve member. Then, during fluid exchange, air or liquor is discharged through this strainer, and during cooking cycle, the upstream liquor is returned to the digester through this, as described above.

The multifunctional sieve member of the present invention, due to its central location and the number of zones possible, improves alkali distribution throughout the cooking process in both batch and continuous operation. The multichannel flow control in the different zones of the central sieve, independently of one another, either completely in or out of the digester, improves the optimization of the currents under constantly changing cooking conditions caused by the boiling chips.

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Claims (14)

117477 15 'ΐ Requirements - A screening member (11) disposed substantially parallel to the vertical axis in the center of the pulp cooker, characterized in that the screening member (11) comprises at least one zone (A; B) in vertical direction comprising a screening section (5.1; 4.1) for a single outlet (1.1; 2.1,3.1) for directing the flow of liquid to the digester. Silorgan (11) enligt patent krav 1, kännetecknat därav att det i vertikalaxelns; riktning är uppdelat i tvä eller flere Zoner (A, B). ····· ': * 0 A screening member (11) according to claim 1, characterized in that it is divided into two or more zones (A, B) parallel to the vertical axis 10. 3. Silorgan (11) enligt patentkrav 1 eller 2, kännetecknat därav att däri haranpassats ..1 30 tvel eller flere kanaler for matning av roller blade account eller frän separata Zoner (A, • · • ··· B). * 1 · 117477 A screening member (11) according to claim 1 or 2, characterized in that two or more channels are provided for supplying fluid flows to or from different zones (A, B). 15 ' 4. Silorgan (11) enligt avegas av tidigare patent krav, kännetecknat därav att det rörformat och har flere canal. Screening element (11) according to any one of the preceding claims, characterized in that it is tubular and multi-channel. 5. Silorgan (11) enligt patent krav 1 eller 2, kännetecknat därav att silzonema (A, B) and belägna intill varandra i organets längdriktning. The screening member (11) according to claim 1 or 2, characterized in that the screening zones • · · • V. 20 (A, B) are adjacent to each other in the longitudinal direction of the member. »· *« • 1 • · · 6. Silorgan (11) enligt patent krav 1 eller 2, kännetecknat därav att silzonema (C, D) and belägna aprständ firin varandra i organets längdriktning. 10 A screening member (11) according to claim 1 or 2, characterized in that the screening zones j (· · · · * (C, D)) are spaced apart in the longitudinal direction of the member. • · · · • · 1 • * ♦ 1 • * 1 7. Silorgan (11) is a patent invention 1 eller 2, a translation technique is used to describe (5.1; 4.1) and the end of the invention (1.1; 2.1, 3.1) and the intill varandra inom silzone (A; B). Screening element (11) according to claim 1 or 2, characterized in that the screening block (5.1;; 4.1) and at least one outlet (1.1; 2.1, 3.1) are adjacent: ***; in the screening zone (A; B). • 1 1 • · 8. Silorgan enligt patentkrav 1 eller 2, kännetecknat därav att en silsektion och ätminstone et utlopp är belägna Päevänd frän varandra inom silzonen. s; Screening member according to claim 1 or 2, characterized in that the screening block and at least one outlet are spaced apart in the screening zone. • · • ····· · · · 117477 9. Silorgan enligt patentkrav 1 eller 2, kännetecknat därav att minst et utlopp ei • · · beläget head silsektionens omräde inom silzonen. • · ·: 1. · 20 • 1; 1 ·· 10. Silorgan enligt patentkrav 1 eller 2, kännetecknat därav att silorganets • · · upphängning i kokaren är utförd ovanifran och / eller underifrän. • · · ♦ * · 1 · • · · A screening member according to claim 1 or 2, characterized in that at least one outlet; is located in the screening zone area of the screening zone. A screening member according to claim 1 or 2, characterized in that the support S of the screening member to the digester is made from above and / or below. 11. Användning av that silorgan enligt patent filav in 1 continuerligt arbetande cockara. 25 '' '' # ·: 12. Användning av et silorgan enligt patentkrav 1 i en satsvis arbetande cocare. • · · * «• ·« · # • - *: 2 3: 13. Användning enligt patentkrav 11 eller 12, the colors avlägsnande av vätska ur kokaren and inmatning av kokaren sker samtidigt. s f1. 30 • · · ♦ · 2 • · 3 117477 Use of a screening member according to claim 1 in a continuous digester. Use of a screening member according to claim 1 in a batch digester. 10 Use according to claim 11 or 12, wherein the liquid is discharged from the digester and the feed to the digester is simultaneous. Use according to claim 11 or 12, wherein the liquid is discharged from the digester and the feed to the digester 15 occurs at different times. ·· «• · • · · 1 ♦ 1. 20 1. Silorgan (11), placerat väsentligen i vertikalaxelns riktning centralt i en kokareför * · massaframställning, kännetecknat därav att silorganet (11) i vertikalriktningen! : '1 1; omfattar minst en zone (A; B) I am running omfattar en si Isektion (5.1; 4.1) för att leda en • · · • · · urstkertm ut ur kokaren, samst min that front (1.1; 2.1,3.1) for att leda en · ···; t M; vätskeström in i kokaren. · ♦ ·.,. = ,, 25. 't 14. Anvandning enligt patent krav Π eller 12, Colors avlägsnande av vätska ur kokaren och inmatning av vätska i kokaren sker vid olitid point. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • · I • * * • * * * • • »* • • • * •«. · «·