JPS6099087A - Pressure type papermaking composite screen - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Lean. For more information, please see the following: When waste paper such as newspapers and magazines is disintegrated, a large number of foreign objects (metal fragments) are mixed into the raw material.

Stones, plastic pieces, styrofoam pieces, vinyl pieces) are separated from the paper stock fibers to prevent people from entering the post-processing room, reducing damage to the secondary screen member by 2 times, and selecting a material with a good M degree. JP-A-11F45 is characterized by selective processing at a concentration of 3 to 4%, which is higher than that of conventional screens.
6'9 (relating to the additional invention of No. 4984).

Conventionally, a pressure screen is known in which assembled and disintegrated raw materials are introduced into a cylindrical screen member and subjected to a selective treatment by being passed through the cylindrical screen member by the action of a rotor equipped with a stirring rod piece. Since the cross section of each part of the cylindrical screen member in the 4lh direction is the same, and the action of the stirring bar is evenly distributed, highly efficient screening was possible using the entire screen surface. The screen member has a fixed surface length in the flow direction of the raw material, so if a single piece of metal, plastic piece, or other foreign matter gets mixed in, it will stagnate between the screen member and the rotor. ,
Foreign matter gets caught between the screen part side and the stirring rod part.

Damage to screen members due to rolling, transfer, etc.
By deforming the sorting hole and making the size and shape irregular, M
If the M accuracy is reduced, or if the mixed foreign matter is a piece of Styrofoam, a sorting piece of vinyl or polyethylene, string, or a gum-like material such as hot melt that binds magazines, etc. There are drawbacks that block the holes and significantly reduce the selection ability.

There, a well-known pressure screen (
The post-processing chamber in the invention) and the processing chamber, which separates foreign matter in the raw material by the action of the paper feeder and sends the paper stock through the primary screen member, are connected to the paper stock delivery section and the introduction section. We provide a pressure-type composite screen for paper manufacturing that prevents foreign matter from entering the post-processing chamber that would damage the cylindrical secondary screen member or reduce the sorting ability, and protect the screen from foreign matter and improve the sorting ability. succeeded in improving.

However, in this case, since the foreign matter is not forcibly brought out in the pretreatment chamber for the first time, the time for which the foreign matter swirls and stays in the pretreatment chamber increases, and as a result, the mixing ratio of foreign matter increases. Since there is a tendency to wear out the inner wall of the pretreatment chamber,
The present invention has been improved to eliminate this tendency.

Next, embodiments of the present invention will be described with reference to the drawings.

In the figure, in the tU post-processing chamber, one of the bases 3 is
One end of the INN 13 is sealed with a lid 4, and a core 21 for the selected stock is provided at the end. 6 1): Using the cylindrical secondary screen part II provided inside the post-processing chamber 1 marked j, screw the screws from the 1) 11 processing chamber + 1111 described later to the mounting ring 7 of the post-processing chamber 1, etc. The end is passed into the post-processing chamber 1, and a selected paper chamber 8 is provided around the cylindrical secondary screen section 416 described above. Reference numeral 9 denotes a bearing case which is provided next to the post-processing chamber 1 and includes the chamber 1 and the inner U, and is fixed to the base 3 by a handle 1 leg 10.

, 1lid support 1.1" on the bearing housing 9; 1) with the shaft, place the tip of 7 on 1] 11.
11 1:rl+ of the 11-shaped secondary screen member 6,
Passive wheel 1 inserted into part 9 and driven by rear end r prime mover 13
Louis is 1 digit for 4. 151d l)! A rotor is provided concentrically within the cylindrical secondary screen member 6 shown in FIG.
It's a stop. Reference numeral 17 denotes a plurality of one-digit stirring rod pieces on the outer circumferential surface of the rotor 15, which rotate to wipe the inner surface of the cylindrical secondary screen member 6 to generate the pulsating pressure of the raw material. The shape and attachment method can be changed and modified in various ways to suit the properties of the paper stock to be processed, and illustrations thereof will be omitted.

Reference numeral 18 denotes a screening hole provided in the cylindrical secondary screen portion A'A' 6, and either a fine circular hole or a narrow slit is selectively used. Reference numeral 19 denotes a pre-treatment chamber in which a selected paper stock delivery section is joined to the selected paper stock introduction section a in the above-mentioned post-processing chamber; The length is increased to accommodate 2 m of raw material, and the capacity is determined so that sufficient time is given to this raw material. 2
Reference numeral 0 denotes a primary screen member provided on the upstream side of the selected stock delivery section a of the pretreatment chamber 19, and is formed into a flat surface, an umbrella surface, a funnel surface, etc., so that objects can be easily projected in the centrifugal direction. 22
is an impeller installed in the pretreatment chamber 19 close to the primary screen member 20 described above, which is fixed to the rotor 15 through a hole drilled in the plate-shaped primary screen 20 and rotated together with the rotor 15 to perform the pretreatment. YJR of raw materials in chamber 19
In addition, effects such as separation of heavy ffl foreign matter to the outer periphery by swirling flow and centrifugal force, and concentration of light foreign matter at the vortex center of the swirling flow are performed.

Reference numeral 23 denotes an outlet pipe for lightweight foreign matter attached to and removed from the open end of the pretreatment chamber 19, which is attached to the center of 2:i5 corresponding to the impeller 22, and is equipped with a valve 24, which is opened to remove light foreign matter from the Let it come out. 25 is a raw material inlet pipe connected tangentially to the circumferential surface of the pretreatment chamber 19 near the impeller 22;
Send raw materials to.

Reference numeral 26 denotes an outlet pipe for heavy foreign matter that is connected to the peripheral surface of the pretreatment chamber 19 approaching the lid 5, and is equipped with a valve n, which is opened to discharge the heavy foreign matter. Reference numeral 28 denotes a secondary selected stock outlet pipe connected to the selected stock chamber 8 in the post-processing chamber 1, through which the second selected stock is sent out. Reference numeral 29 denotes a rear chamber formed between the lid 4 that closes one end of the post-processing chamber 1 and the rotor 15, which receives foreign matter that cannot pass through the cylindrical secondary screen member 6, and receives foreign matter connected to the lid 4. It is designed to be discharged to the outside from an outlet pipe 30.

Reference numeral 31 denotes a heavy foreign object ks = ff provided on the inner wall surface of the pretreatment chamber 19, which is preferably provided in a spiral shape along the direction of the raw material flow, as shown in Fig. 7 strips are provided below the raw material inlet pipe 25/(L side) and end at the upstream side of the outlet pipe 26 for heavy foreign matter, or between the downstream side of the raw material inlet pipe 25 and the heavy foreign matter. As shown in FIG. 1 of the drawing, two or three branched strips are provided between the upstream side of the outlet pipe 26, and this guide strip 31 is provided as shown in FIG.
It may be a convex strip that protrudes from the inner wall as shown in the figure, or it may be four strips that are recessed from the inner wall as shown in Figure No. 1 and Figure 7. In the case of a protruding strip, the height 1) of the inner wall of the iJ processing chamber Circumference h°
without interfering with the swirling flow of raw materials that occurs along the direction.
In order to collect and guide heavy foreign objects, the depth shall be set within the range of 5 to 25 fi, and in the case of four strips, the depth shall be set within the range of 3 to 25 fi for the above-mentioned purpose. The following shall be established.

In addition, in this pressure-type composite screen for papermaking, raw materials are not fed into the pretreatment chamber 19 from the inlet pipe 25 shown in the embodiments and drawings, but from the outlet pipe 23 for light foreign matter.
In this case, the non-passable material containing light foreign matter is guided away along with the heavy foreign matter, but it does not affect the stock in the post-processing chamber. It is not a product, and there is no problem in operation.

An example of the implementation of the pressure-type composite screen for paper manufacturing according to the present invention is constructed as shown in +iiJ. If the differential pressure of the raw material between the inlet side and the outlet i side is made constant, the amount of raw material passing through (the amount passing through the inlet pipe) is determined, so in this state B The concentration is about 1-5 times that of the screen,
When the raw material that has been dried (3 to 100% dry) is tangentially blown into the pretreatment chamber 19, the raw material is given a swirling force by the blowing force and the rotation of the impeller 22 rotating in the pretreatment chamber 19. 1) High-speed rotation inside the 11 processing chamber 19 to effectively perform INI
JIQ? Pieces of Kanazuka stone, plastic pieces, vinyl sheet pieces, etc. that get mixed in due to the action of centrifugal force.

Heavy foreign objects such as pieces of wood are expelled to the outer periphery, and these heavy foreign objects enter the guide strip 31 as they rotate, and are forced by the guide strip 31 to move toward the outlet pipe 26 of the heavy foreign objects, causing escape or counterflow. The liquid is collected in the outlet pipe 26, and light foreign matter, such as sheet pieces of styrofoam, vinyl, polyethylene, etc.
The rotation of the impeller 22 causes convection in the pretreatment chamber 19 in which the raw material, which has moved leftward along the outer ring, moves to the right in the center, as shown in FIG. Since a vortex column is generated, the foreign matter is collected by the vortex column and exits the eave hI outlet pipe 2.
3 and is collected in the outlet pipe 23, so the outlet pipes 26 and 23 are equipped with ('i+j L/valve n, 24
When opened, heavy foreign objects and light foreign objects are discharged to the outside.

On the other hand, it passes through the -next screen member 20 and its screening hole 21
The remaining foreign matter and crude materials that cannot pass through are removed, and the raw material that flows out to the delivery section is passed from the introduction section a to the cylindrical secondary screen member 6.
and the rotor 15 to be sorted by the cylindrical secondary screen member 6. At this time, there are no large foreign substances in the raw material that could cause damage to the M)-shaped secondary screen member 6. Since there is no such thing, the stirring bar piece 17 is not interfered with by foreign matter, and the cylindrical secondary screen member 6 is not damaged or clogged, thereby reducing its ability, and it is possible to perform accurate sorting. power (can be done)

Further, even if the fine particles and undisintegrated raw materials cannot pass through the cylindrical secondary screen member 6, even if they pass through the cylindrical secondary screen member 6 and enter between the cylindrical secondary screen member 6 and the rotor 15, Flows along the secondary screen member 6 toward the rear chamber 29,
When it reaches the rear chamber 29, it is discharged to the outside through an outlet pipe 30.

In order to eliminate damage to the cylindrical secondary screen member caused by foreign matter, the pressure-type composite screen for paper manufacturing according to the present invention uses an impeller to generate a swirling flow of the raw material on the upstream side of the screen member relative to the refined paper stock flow. A fr system that separates foreign substances from raw materials and sends only the paper stock through the primary screen member.
An i+ processing chamber was set up so that only the primary selected paper stock was sent to the post-processing chamber, so metal pieces were removed.

Stones, plastic pieces, and other foreign substances are separated from the paper stock by the vortex, swirling motion, and centrifugal force generated in the pretreatment chamber by the rotation of the impeller, and the foreign substances are separated into cylindrical shapes by screening using a screen member. Since foreign matter is prevented from entering the secondary screen member, various harmful effects caused by foreign matter entering the post-processing chamber are prevented. Since the impeller is installed at the same time, the rotation of this impeller effectively disintegrates the paper stock, and the raw material is swirled in the direction of rotation and given a vortex, and the centrifugal force generated by this causes heavy foreign substances in the raw material to be removed from the front. The material is blown to the outer peripheral wall of
Light-weight foreign matter (lighter than paper stock) is transported to the center by the action of the vortex generated in the center of the chamber due to swirling, whirlpools, and centrifugal force in the pre-treatment chamber, and is transported to the center of the pre-treatment chamber using a lightweight foreign material placed in the center of the lid of the pre-treatment chamber. When the foreign matter outlet pipe is opened, most of the foreign matter in the raw material is removed in the pretreatment chamber because it is expelled to the outside.

Furthermore, even if a foreign object that is small enough to pass through the secondary screen member stops within the cylindrical secondary screen member, this screen member may be damaged.

There is no risk of deformation, and the foreign matter is sent to the rear chamber by the stirring rod piece on the circumference of the loaf and discharged from the outlet pipe, eliminating the need for rtj on the cylindrical secondary screen surface and allowing processing concentrations of 3 to 30%. Accurate screening may be possible at a high concentration of 4%.

Furthermore, the pretreatment chamber in this screen has a guiding strip along the swirling direction of the raw material flow on its inner wall, and this guiding strip traps foreign matter on the ju:1 that is brought to the inner wall by centrifugal force.
This is forced into the outlet pipe 42 of the heavy foreign matter to minimize the rubbing of the inner wall by the claw h1 foreign matter, thereby reducing the wear on the inner wall to just one.

It produces unique effects such as:

4 Additional Relationships The present invention relates to an additional invention disclosed in Japanese Patent Application Laid-Open No. 56-96984, in which a swirling flow is generated in the raw material by the rotation of an impeller, foreign matter in the raw material is separated, and the paper stock is adjusted to the impeller. A pre-treatment chamber which performs primary selection through a partial screen member and sends it to a delivery section, and a rotor which introduces the above-mentioned second selection paper stock from an introduction section into a cylindrical secondary screen section and is equipped with a stirring rod section. The post-processing chamber where secondary screening is carried out through the cylindrical secondary screen member is connected to the inlet section and the introduction section of the selected paper to form a series, so that the cylindrical post-processing chamber is Using the right of the prior application, the patent claims to protect the screen members and improve the screening ability by preventing the infiltration of foreign substances that may cause damage to the screen members or reduce the screening ability.
A further advantage is that a guide line for heavy foreign matter is provided on the inner wall of the pre-treatment chamber along the direction of the raw material flow, and this guide line forcibly removes the heavy foreign matter, thereby reducing yarn wear in the JiJ processing chamber. This enhances the effect of the original invention.

[Brief explanation of drawings]

The drawings show one embodiment of the pressure screen according to the present invention, and FIG. 1 is a longitudinal sectional front view. Figure 2 is a longitudinal side view of the central chamber. Figure 3 is a longitudinal side view of the front chamber. FIG. 4 is a partially cutaway front view of another embodiment showing how the guide strips are attached. Fifth
~Figure 7 is an explanatory diagram of each 1% example showing the shape of the guide strip. In the figure, 1 is a post-processing chamber, a is a selected stock introduction section, 6 is a cylindrical secondary screen member, 15 is a rotor, and 17 is 1? 19 is the pretreatment chamber, b is the fine paper separation material No. 7, so-called

Claims (1)

[Claims] (1) A pretreatment chamber in which a swirling flow of the raw material is generated by the rotation of the impeller to separate foreign matter in the raw material, and the paper stock is first sorted through a primary screen member corresponding to the impeller and sent to the delivery section; a post-processing chamber in which the selected paper stock is introduced into a cylindrical secondary screen member from the processing section, and is subjected to secondary selection through the cylindrical secondary screen member by the action of a rotor equipped with an external agitating piece; In the pressure-type venting screen for paper manufacturing in which the inlet part and the bulk part of the selected paper stock are joined together and made into a series, heavy foreign matter is placed on the inner wall of the pretreatment chamber along the direction of the swirling flow of the raw material. A pressure-type N-coupling screen for wall paper, characterized by having one or more diagonal strips.