JP7208618B2 - Concentrated dehydrator - Google Patents

Description

The present invention relates to a thickening/dehydrating machine used for thickening/dehydrating waste paper before deinking treatment.

The concentration dehydrator disclosed in Patent Document 1 is a dehydration drum provided with a raw material inlet at the bottom of a raw material storage tank, a raw material outlet at the top, and a water passage hole such as punch metal or the like in the raw material storage tank. are provided in parallel. The two dewatering drums rotate in opposite directions from the bottom to the top at the tangential portions where they are in contact with each other. Further, the dewatering drum on the side of the raw material outlet rotates in a fixed state at the position where it is provided, and the outer periphery of the drum is covered with a wire mesh of fine mesh. The dewatering drum on the opposite side is tilted by an air spring with its lower part as a fulcrum, and a wire mesh of coarse mesh is attached to the outer circumference of the drum. Both end faces of the two dehydration drums are opened, and the interior of the dehydration drums communicates with the drainage port provided on the side surface of the raw material storage tank through these openings.

In this thickening/dehydrating machine, a raw material consisting of water containing about 2 to 3% of paper material fibers is introduced into a raw material storage tank through a raw material inlet. This raw material flows into the dewatering drum through the holes of the wire mesh and punch metal. As the dewatering drum rotates, the raw material is dewatered, and the paper fibers are carried upward while being caught by the edge of the hole and the wire mesh. By being compressed at the pressed portion, the paper material fibers on the movable side are drawn toward the stationary side and formed into an integral plate-like state. This is scraped off by a doctor, then placed on a scraping conveyor and transported to the next step in a plate-like state. On the other hand, water is drained from the drain port.

Japanese Patent No. 3433905

Recently, due to changes in printing technology, printing ink components, etc., the situation has become severe from the viewpoint of deinking regeneration. Machines are also required to evolve further.
The present invention has been made in view of the conventional problems described above, and an object of the present invention is to further improve the concentration dehydrator of Patent Document 1 and to provide a dehydrator with enhanced dehydration effect.

By the way, in the above thickening and dehydrating machine, dehydration is performed by utilizing the rotation of the dewatering drum, and the dewatered stock fibers adhere and accumulate on the inner surface of the dewatering drum. Therefore, if deposition is actively promoted, it spreads from the rim of the hole into the hole and becomes mat-like to block the hole. When this happens, the paper fibers hit the mat-like body and are prevented from passing through, allowing only moisture to pass through. Then, as the paper material fibers are also deposited and the mat-like body becomes thicker, the paper material fibers are further deposited.
In this way, the filtration action is developed with the operation of the concentration dehydrator.

Early formation of a mat-like body is effective for manifestation of this filtering action, and for this purpose, it is necessary to minimize the water level inside the dehydration drum. Although the concentration and dehydrator of Patent Document 1 also has a low water level, the filtration effect due to the formation of the mat-like body as described above is not recognized. A moderate gap was formed between the end face of the raw material container and the inner surface of the raw material storage tank, and the water level was kept low as far as it was.
In order to positively satisfy this water level condition, the thickener/dehydrator of the present invention has the drain port set at a low position, and the dehydration drum is arranged such that the water passage hole serves as the only inflow path for the raw materials into the dehydration drum. The end face of the container and the inner surface of the raw material storage tank on the side of the drain outlet are connected in a waterproof manner.

The invention of claim 1 comprises: a raw material storage tank to which a raw material made of water containing paper material fibers is supplied; a pair of dewatering drums, one of which has a relatively coarse mesh wire mesh attached to its outer surface and the other body portion has a relatively fine mesh wire mesh attached to its outer surface; pressing means for pressing the body of one dehydration drum against the body of the other dehydration drum; rotating means for rotating the pair of dehydration drums in opposite directions so that the delivery direction of the pair of dehydration drums is upward; A waterproof connection means for rotatably and waterproofly connecting both end surfaces of a pair of dewatering drums to the inner surface of the raw material storage tank, and a waterproof connection portion on the raw material storage tank side. A drain port located sufficiently below the position of the pressure along the lower edge, and a doctor for scraping off deposits on the body of the other dehydration drum on the forward side in the delivery direction, and the water passage hole is the only inflow route of the raw material into the dewatering drum, and the waterproof connection means consists of an annular drum-side ridge provided on the end surface of the dewatering drum and an inner surface of the raw material storage tank. an annular container-side ridge protruding from the drum-side ridge and having substantially the same outer diameter as the drum-side ridge; a waterproof, elastically deformable strip; The belt-shaped body is wound around the outer surfaces of the drum-side ridges and the storage tank-side ridges so that they are coaxially opposed to each other with a gap therebetween, and the belt-shaped body straddles the gap and tightens the drum-side ridges. The belt-shaped body is wound so that the winding end of the belt-shaped body is on the upper side. a locking fitting attached to a portion and having a locking portion; a support shaft fixed to the plate-like fixing portion and having an insertion hole; a male screw member; and the male screw inserted through the insertion hole of the support shaft. It is composed of a pair of female screw members screwed to the member from both sides, one end of the belt-shaped body is folded back, and the locking part is passed through the ring-shaped part, and the other end of the belt-shaped body is connected to the male screw. The concentrating dehydrator is characterized in that it is connected to a screw member, and tightening force is changed depending on the insertion position of the male screw member .

The invention of claim 2 is the thickening/dehydrating machine according to claim 1 , wherein the top of the storage tank-side protruding streak is missing, and the vicinity thereof is used as the winding end. .

The dehydration effect can be significantly enhanced by changing the arrangement position of the drain port and adopting a waterproof connection structure while maintaining the basic configuration of the thickening dehydrator described in Patent Document 1 as it is.

1 is a side view of a concentration dehydrator according to an embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view of the main part of the concentration dehydrator of FIG. 1 and an image diagram of the material flowing into the dehydration drum. FIG. 3 is a side view showing a state in which the dewatering drum is housed without the flat belt attached, taken along the line AA in FIG. 2; FIG. 4 is an explanatory diagram of a method of attaching a flat belt to the state of FIG. 3; FIG. 5 is an explanatory view of a flat belt mounting method shown from a direction different from that of FIG. 4 ; FIG. 6 is an explanatory view of a flat belt mounting method shown from a different direction from FIGS. 4 and 5; 5 is a perspective view of the flat belt of FIG. 4; FIG. It is a side view which shows the state which mounted|worn the flat belt in FIG. It is explanatory drawing of the mounting method of the flat belt which concerns on other embodiment. FIG. 10 is an explanatory diagram of a method of attaching a flat belt according to another embodiment, shown from a direction different from that of FIG. 9;

A concentration dehydrator 1 according to an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 2 denotes a base, and on the right side of this base 2, a fixed table 3 is fixed. A fixed bracket 4 projecting leftward is provided on the lower part of the fixed base 3 .
A tilt table 5 is provided on the left side of the base 2 . A tilting bracket 6 is provided at the right end of the lower surface of the tilting table 5 . The tilting bracket 6 is connected to the fixed bracket 4 via a support shaft 7, and the tilting base 5 can be tilted with the support shaft 7 as a fulcrum. The base 2 is also provided with an air spring 8, which supports the left end of the lower surface of the tilting table 5. The air spring 8 is tilted by expansion and contraction due to pressurization and decompression.
A locking piece 9 projecting leftward is attached to the tilting base 5 . A stopper bracket 10 is provided on the left end of the base 2. The stopper bracket 10 has a rod-shaped pressure limit stopper 11 screwed into a vertically penetrating screw hole. there is When the lower end surface of the pressurization limit stopper 11 comes into contact with the locking piece 9, further pressurization is regulated, so that the tilt table 5 tilts up to that upper limit.

Numeral 12 indicates a raw material storage tank, and this raw material storage tank 12 is composed of a fixed tank 13 , a tilting tank 14 , and an expandable part 15 connecting the fixed tank 13 and the tilting tank 14 . The fixed tank 13 is supported by the fixed base 3 and the tilting tank 14 is supported by the tilting base 5 .
As shown in FIG. 2, in the raw material storage tank 12, two dehydration drums 16 are stored with cylindrical bodies 17 lying sideways. Hereinafter, when the two dehydration drums 16 are separately described, they are referred to as dehydration drums 16A and 16B. A dehydration drum 16A is accommodated in the fixed tank 13 of the raw material storage tank 12, and a dehydration drum 16B is accommodated in the tilting tank 14, which are arranged substantially horizontally. A rotating shaft 18 is inserted into the axial center of each of the dehydrating drums 16 while being supported by hubs 18a provided on both end faces. It is rotatably supported by bearings (not shown) provided in the tilting tank 14 . The rotary shaft 18 is rotated by a torque transmitted from a motor and a speed reducer (not shown).

As shown in FIG. 3, the cylindrical body 17 of the dewatering drum 16 is made of punched metal and has a large number of water passage holes 19 formed therein.
As shown in FIG. 2, the cylindrical body 17A of the dewatering drum 16A is covered with a wire mesh 53 having a fine mesh (for example, 25 meshes). is stretched inside. On the other hand, the cylindrical body 17B of the dewatering drum 16B is covered with a wire mesh (not shown) having a slightly coarser mesh (for example, 16 mesh). omitted) is stretched on the inside.

As shown in FIG. 4, both end faces of the cylindrical body 17 of the dehydration drum 16 have openings slightly narrowed by inner flanges 20. A ridge 21 is provided.
On the other hand, from the inner surface of the raw material storage tank 12 side, an annular storage tank side protrusion 24 protrudes. An outer peripheral surface 25 of the container-side protruding portion 24 is configured to have substantially the same outer diameter as the outer peripheral surface 22 of the drum-side protruding portion 21 . However, the upper apex of the container-side protruding streak portion 24 is missing to form a missing portion 26 . This missing part 26 is located on the intersection with the through groove 26a of the rotating shaft 18 when the rotating shaft 18 is lowered and the dewatering drum 16 is accommodated in the tank. In this case, the storage tank-side protruding streak part 24 does not become an obstacle. When the rotary shaft 18 is supported by the bearings, the container-side protruding streak portion 24 and the drum-side protruding streak portion 21 are coaxially opposed to each other with a small gap therebetween.

The mechanisms shown in FIGS. 5 and 6 are provided on the left and right side plates 13a of the fixed tank 13 and the left and right side plates 14a of the tilting tank 14, respectively. A mechanism provided on the right side plate 13a of the tank 13 will be described as a representative example, and descriptions of mechanisms provided at other locations will be omitted. This also applies to mechanisms according to other embodiments shown in FIGS. 9 and 10, which will be described later.
As shown in FIGS. 5 and 6, a connecting support portion 28 is provided on the upper end face of the side plate 13a of the fixed tank 13. As shown in FIGS. The connection support portion 28 is composed of a plate-like fixing portion 29 and a bolt 30 for fastening and fixing the plate-like fixing portion 29 to the upper end surface of the side plate 13a. The support shaft (support member) 32 is welded and fixed to the upper surface of the plate-like fixed portion 29 . The support shaft 32 protrudes across the missing portion 26 toward the storage tank side of the raw material storage tank 12, and an insertion hole 33 is formed on the projecting side. A shaft portion 35 of a male screw member 34 is inserted through the insertion hole 33 , and a pair of nuts (female screw members) 36 are screwed on both sides of the shaft portion 35 to connect the male screw member 34 to the support shaft 32 . . The insertion position of the shaft portion 35 of the male screw member 34 can be adjusted by loosening the nut 36, moving the shaft portion 35 with respect to the insertion hole 33, and tightening again.
A triangular ring 37 is formed integrally with one end of the shaft portion 35 of the male screw member 34 . One corner of the triangular ring 37 continues to the shaft portion 35, forming a Y shape with the shaft portion 35. As shown in FIG. A portion sandwiched between the remaining two corners is perpendicular to the shaft portion 35 . This orthogonal portion serves as the latching shaft 38 .

A reference numeral 51 denotes a locking metal fitting, which includes a square rod-shaped linking portion 51a extending in the vertical direction, mounting portions 51b extending in the horizontal direction at the upper and lower ends of the linking portion 51a, and a belt locking portion. 51c. The mounting portion 51b and the belt engaging portion 51c extend in opposite directions.
The locking fitting 51 is attached to the plate-shaped fixing portion 29 by means of a bolt 31 inserted through an insertion hole (not shown) formed in the attachment portion 51b. The belt engaging portion 51c protrudes into the raw material storage tank 12 .
Reference numeral 39 denotes a belt-shaped flat belt, and the width of the flat belt 39 is determined by matching the axial lengths of the container-side protruding portion 24 and the drum-side protruding portion 21 and the size of the gap between them. are set almost identically. Therefore, when the flat belt 39 is wound, it is possible to straddle the drum-side ridges 21 opposed to the storage tank-side ridges 24 with a gap therebetween and cover the respective outer peripheral surfaces thereof.
As shown in FIG. 7, the flat belt 39 is made of a waterproof synthetic material and has a two-layer structure. A sponge body 40 made of highly elastic neoprene rubber is formed on the side that abuts against the container-side protruding portion 24 and the like.
Four connecting holes 41 are formed at intervals at both ends of the flat belt 39 .

The flat belt 39 is wound and mounted in the following manner.
One end of the flat belt 39 is folded back and overlapped so that each of the four connecting holes 41 communicates two by two. Then, in this state, the bolt 42 is inserted through the two connecting holes 41 communicating with each other, and after passing through the two connecting holes 41 together, they are fastened and connected with the nut 43 . Thereby, a ring-shaped portion 52 is formed at one end of the flat belt 39 . A folded portion 39A formed by folding back one end of the flat belt 39 serves as a winding end.
The flat belt 39 is wound around the outer peripheral surfaces of the container-side protruding line portion 24 and the drum-side protruding line portion 21, and the ring-shaped portion 52 is passed through the belt locking portion 51c of the locking metal fitting 51 so that one end of the flat belt 39 is engaged. stop.
The other end is passed through the triangular ring 37 of the male screw member 34, folded back by the locking shaft 38 and overlapped so that the four connecting holes 41 are communicated two by two. A bent portion 39B formed by folding back serves as a winding end.

The flat belt 39 is wound slightly loosely so that it can be easily fastened with the nut 43 . Also, on the male screw member 34 side, the nut 36 is loosened so that the shaft portion 35 can move in the axial direction.
The flat belt 39 has elasticity and is superimposed without gaps following the shape of the circumference. be. The tightening force can be adjusted by moving the insertion position of the shaft portion 35 of the male screw member 34 as described above.
The bent portion 39A and the bent portion 39B extend to the vicinity of the edge of the missing portion 26, and the flat belt 39 makes almost one turn and is wound in a tensioned state, so that the inside of the dewatering drum 16 is watertightly connected. . In addition, since the water level of the raw material stored in the raw material storage tank 12 is always higher in the missing part 26 and its vicinity, the waterproof connection is not affected.

As shown in FIG. 8, both end surfaces of the dehydration drum 16 are waterproofed by using a flat belt 39, and the water passage holes 19 are the only inflow paths for the raw material into the interior of the dehydration drum 16. .
The raw material storage tank 12 has an annular portion surrounded by a watertight connection with the dewatering drum 16, and a drain port 44 is formed by cutting out a rectangular lower portion of the portion.

As shown in FIG. 1, a raw material inlet 45 is provided below the raw material storage tank 12 . A material discharge port 48 is provided on the upper side of the dehydration drum 16A via a doctor 46 and a scraping conveyor 47, and a raw material overflow port 49 is provided on the upper side of the dehydration drum 16B. there is The raw material overflowed from the raw material overflow port 49 is circulated to the raw material storage tank 12 .
A shower 50 is also provided for replenishing water when necessary.

The tilting tank 14 on the side of the dewatering drum 16B is repeatedly tilted between the state indicated by the dotted line in FIG. As a result, the dewatering drum 16A on the side of the fixed tank 13 is cyclically pressed against the dewatering drum 16B on the side of the tilting tank 14, and the material sandwiched between them is compressed. However, since the pressure limit stopper 11 is provided as described above, the amount of pressure can be adjusted, and deformation of the cylindrical bodies 17A and 17B of the dewatering drums 16A and 16B is prevented.

Next, the operation of the concentration/dehydrator 1 from the introduction of raw materials to the discharge thereof will be described with reference to FIG.
The dewatering drum 16A rotates about its axis, and the dewatering drum 16B rotates about its axis and tilts repeatedly. The dewatering drum 16A rotates clockwise, and the dewatering drum 16B rotates counterclockwise.
In this state, the raw material M is injected from the raw material inlet 45 of the raw material storage tank 12 .

The water level of the raw material M is gradually raised from the bottom to the top. As shown in FIG. It flows into the dewatering drums 16A and 16B. At the first stage, as shown in the inflow image diagram (A) of FIG. 2, the stock fibers P flow into the dewatering drums 16A and 16B as the raw material M, and then are dewatered by the rotation to form meshes, water passage holes 19, and the like. After being dehydrated, it adheres and deposits in the vicinity. The water W generated at that time is drained from the drain port 44. - 特許庁
The deposited paper stock fibers P are compressed between the cylindrical bodies 17A and 17B of the dewatering drum 16A and the dewatering drum 16B, and further dewatered to a high concentration at once. Since the cylindrical body 17A of the dewatering drum 16A is covered with a wire netting 53 of fine mesh, the dewatered paper stock fibers P form an integral plate-like shape and adhere to the dewatering drum 16A. It is scraped off by a doctor 46 at a position rotated by about 10 degrees, and then crushed by a scraping conveyor 47 into small pieces and transported to the next step. Water W generated during dehydration by compression is also drained from the drain port 44. - 特許庁

Furthermore, as a feature of the present invention, as shown in the inflow image diagram (B) of FIG. 2, as the accumulation of the paper material fibers P progresses, they spread so as to block the water passage holes 19 and form a mat-like body. When it becomes a mat-like body, it functions as a filter (filtering body), and the paper material fibers P among the raw materials M which are newly directed hit the already matted paper material fibers P and are prevented from passing through, and only the moisture W can easily pass through. becomes. That is, a filtering action is exhibited. As the deposition progresses, the mat becomes thicker and the filtering action increases. Due to this filtering action, the dehydration effect is remarkably enhanced, and the water W discharged from the drain port 44 becomes cleaner water, which makes it easier to reuse.

Even with the above features, the flat belt 39 can be easily attached and detached, so the burden of maintenance does not increase.
In addition, a small motor with a small horsepower can be used as a power source, and the external shape and size of the device do not change.

9 and 10 are explanatory diagrams of a method of mounting the flat belt 39 of the thickening dehydrator according to another embodiment. 9 and 10 correspond to FIGS. 5 and 6 of the above embodiment.
In this embodiment, one winding end 39C of a flat belt 39 as a belt-like body is fastened and fixed to the drum-side protruding portion 21 by means of bolts 42 and nuts 43. As shown in FIG. That is, no ring-shaped portion is formed at one end of the flat belt 39, and two connecting holes (not shown) are formed at the winding end 39C. A bolt 42 is inserted through an insertion hole (not shown) formed in the .
Other configurations of the concentrating dehydrator according to the present embodiment are the same as those of the above embodiment.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment. included.
For example, in the above embodiments, it is described that used paper is dehydrated to a sufficiently high concentration before being put into a deinking machine, but it can also be used for virgin pulp.

DESCRIPTION OF SYMBOLS 1... Concentrating dehydrator 2... Base 3... Fixing base 4... Fixing bracket 5... Tilting base 6... Tilting bracket 7... Support shaft 8... Air spring 9... Locking piece 10... Bracket for stopper 11... Pressurization limit stopper 12... Raw material storage tank 13 Fixed tank 13a Side plate of fixed tank 14 Tilting tank 14a Side plate of tilting tank 15 Extension part
16A, 16B... Dehydration drum 17A, 17B... Cylindrical body
DESCRIPTION OF SYMBOLS 18... Rotating shaft 18a... Hub 19... Water passage hole 20... Inner flange 21... Drum-side protruding part 22... Outer peripheral surface 24... Storage tank-side protruding part 25... Outer peripheral surface 26... Missing part 26a... Through groove 28... Connection support part 29 Plate-like fixing part 30 Bolt 31 Nut 32 Support shaft 33 Insertion hole 34 Male screw member 35 Shaft 36 Nut 37 Triangular ring 38 Hanging shaft 39 Flat belt 39A Bending part 39B Bending part 39C Winding end 40 Sponge body 41 Connecting hole 42 Bolt 43 Nut 44 Drain port 45 Raw material inlet 46 Doctor 47 Scraping conveyor 48 Raw material discharge port 49 Raw material Overflow port 50 Shower 51 Locking metal fitting 51a Linking part of locking metal fitting 51b Mounting part of locking metal fitting 51c Belt locking part of locking metal fitting 52 Circular part 53, 54 Wire mesh M Raw material P Paper fiber W: Moisture

Claims (2)

a raw material storage tank to which a raw material consisting of water containing paper stock fibers is supplied;
A large number of water passage holes are formed in the body portion, and a relatively coarse mesh wire mesh is attached to the outer surface of one body portion, and the other body is provided in parallel in the horizontal direction in the raw material storage tank. a pair of dewatering drums having relatively fine mesh wire mesh attached to the outer surface of the part;
pressing means for pressing the body of one of the dehydration drums against the body of the other dehydration drum; rotating means for rotating the pair of dehydration drums in opposite directions so that the delivery direction of the pair of dehydration drums is upward;
waterproof connection means for rotatably and waterproofly connecting both end surfaces of the pair of dewatering drums to the inner surface of the raw material storage tank;
a drainage port formed on the inner surface surrounded by the waterproof connection portion on the raw material storage tank side and positioned sufficiently below the position of the pressure along the lower edge of the inner surface;
Equipped with a doctor for scraping off deposits on the body of the other dewatering drum on the forward side in the delivery direction,
The water passage is the only inflow route of the raw material into the dehydration drum ,
The waterproof connection means is
An annular drum-side ridge provided on the end face of the dewatering drum, and an annular container-side ridge protruding from the inner surface of the raw material storage tank and having substantially the same outer diameter as the drum-side ridge. A strip portion, a waterproof and elastically deformable belt-like body, and the drum-side protruding strip portion and the storage tank-side protruding strip portion are coaxially opposed to each other with a gap therebetween, and the strip straddles the gap. is composed of belt-shaped body winding means for winding and tightening the outer surface of the drum-side ridge and the storage tank-side ridge, and the belt-shaped body is wound so that the winding end of the belt is on the upper side,
The band winding means includes:
a plate-shaped fixing portion provided on the raw material storage tank side;
a locking fitting attached to the plate-shaped fixing portion and having a locking portion;
It is fixed to the plate-shaped fixing portion and is composed of a support shaft having an insertion hole, a male screw member, and a pair of female screw members screwed from both sides to the male screw member inserted through the insertion hole of the support shaft. ,
One end of the band-shaped body is folded back to form a ring-shaped portion through which the locking portion is passed, and the other end of the band-shaped body is connected to the male screw member,
A concentrating and dehydrating machine, wherein a tightening force is changed according to an insertion position of the male screw member . In the concentration dehydrator according to claim 1,
A thickening dehydrator characterized in that the apex of the storage tank-side protruded streak is missing, and the vicinity thereof is used as the winding end .

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