WO2011058935A1

WO2011058935A1 - Deinking effluent treatment apparatus, deinking system, and deinking effluent treatment method

Info

Publication number: WO2011058935A1
Application number: PCT/JP2010/069780
Authority: WO
Inventors: 優輔長田; 建太中尾
Original assignee: デュプロ精工株式会社
Priority date: 2009-11-11
Filing date: 2010-11-08
Publication date: 2011-05-19
Also published as: JP2011102450A; JP5724075B2; DE112010004352T5

Abstract

Disclosed is a deinking effluent treatment apparatus (52) which is provided with: an endless mesh belt (57) looped around a plurality of rotating rollers (55); a belt driving unit which drives the mesh belt (57) to run; a deinking effluent supplying unit (56) which supplies a deinking effluent onto the mesh belt (57); and at least one squeeze roller (59) which holds the mesh belt between the squeeze roller (59) and at least one of the rotating rollers (55) and squeezes the dregs on the mesh belt (57).

Description

Deinking drainage processing apparatus, deinking system, and deinking drainage processing method

The present invention relates to a deinking drainage processing apparatus, a deinking system, and a deinking drainage processing method.

2. Description of the Related Art Conventionally, there is known a used paper recycling apparatus for producing recycled paper by deinking pulp fibers obtained by disaggregating used paper and making a deinked pulp liquid after deinking. In the deinking process, the coloring components for printing such as the ink component and the toner component are separated and removed from the liquid containing the pulp fibers. The deinking drainage liquid generated by this separation contains the pulp fibers together with the coloring components for printing and the like. It is mixed.

If you try to discharge the drained liquid with pulp fibers mixed, it may clog piping. Moreover, since it will not satisfy | fill the waste_water | drain standard regarding SS (floating matter) when it contains many pulp fibers, it is necessary to isolate | separate and remove this pulp fiber. Regarding the removal of foreign matter from liquids containing such pulp fibers, Japanese Patent Application Laid-Open Publication No. 2006-183210 discloses a technique using a screen device formed by superposing three screens.

However, the screen device disclosed in the above document requires a large amount of energy for rotating the screen and generates considerable vibration and noise. On the other hand, as another method for separating the pulp fibers from the deinking waste liquid, it is conceivable to filter the pulp fibers using a filter or the like. Cost.

The present invention solves the above-described problems, can be operated with a small amount of energy, hardly generates vibration and noise, and can efficiently perform a deinking drainage treatment method and such a method in a short time. An object of the present invention is to provide a deinking drainage treatment apparatus.

In order to achieve the above object, a deinking drainage processing apparatus of the present invention includes a deinking drainage supply unit that supplies deinking drainage generated by deinking waste paper pulp liquid, and filters the deinking drainage liquid. An endless mesh belt, a plurality of rotating rollers for passing the mesh belt, a belt driving unit for driving the mesh belt, and at least one rotating roller among the plurality of rotating rollers are arranged so as to face the rotation. It is characterized by comprising a squeezing roller that sandwiches the mesh belt with the roller and squeezes the filter cake on the mesh belt.

In the deinking drainage processing apparatus of the present invention, a filter cake scraping portion is provided above the mesh belt, and the filter cake scraping portion has a scraping blade for scraping the filter cake by a predetermined amount on the mesh belt. And

In the deinking drainage processing apparatus of the present invention, the filter scraping unit includes a rotating shaft, a plurality of scraping blades provided radially around the axis of the rotating shaft, and a scraping driving unit that rotationally drives the rotating shaft. It is characterized by having.

In the deinking / drainage processing apparatus of the present invention, the deinking and drainage treatment apparatus includes a squeezing roller that comes into contact with the rotating roller facing the squeezing roller with a predetermined pressure, and the rotating roller has an outer peripheral portion made of a water absorbing member.

In the deinking drainage processing apparatus of the present invention, a guide extending in the belt traveling direction along the upper surface of the mesh belt is provided on at least one of the side edges in the width direction of the mesh belt. The guide is inclined with respect to the belt traveling direction in a plan view, and the downstream end in the belt traveling direction is located closer to the center in the width direction of the mesh belt than the upstream end in the belt traveling direction. And

The deinking / drainage processing apparatus of the present invention includes a control unit that controls the operation of the belt drive unit, and the control unit temporarily stops the mesh belt after running for a predetermined time and intermittently runs the function. It comprises a part.

In the deinking drainage processing apparatus of the present invention, the control unit includes a control unit that controls the operation of the belt driving unit, and a drainage amount detection unit that detects the deinking drainage amount supplied from the deinking drainage supply unit. Is provided with a travel speed control function unit that changes the travel speed of the mesh belt based on the deinking drainage amount detected by the drainage amount detecting means.

In the deinking drainage treatment apparatus of the present invention, the deinking drainage processing apparatus includes a filtrate tank for storing a filtrate generated by filtering the deinking drainage with a mesh belt, and the filtrate tank has a magnetic substance inside.

The deinking system of the present invention includes a deinking apparatus that deinks waste paper pulp liquid and separates the deinked waste liquid from the used paper pulp liquid, and a deinking that processes the deinked waste liquid separated by the deinking apparatus. It has a drainage processing device, and the deinking drainage processing device is composed of the deinking drainage processing device described in any one of the above.

In the deinking drainage processing method of the present invention, a mesh belt stretched around a plurality of rotating rollers is driven by a belt drive unit, and deinking drainage generated by deinking waste paper pulp liquid is deinked and drained supply unit. Is supplied onto the mesh belt, and the deinked waste liquid is separated into solid and liquid by filtration through the mesh belt, and remains on the mesh belt between the squeezing roller disposed opposite to at least one of the rotating rollers and the rotating roller. It is characterized by squeezing the filter cake.

According to the deinking drainage processing apparatus of the present invention, the deinking drainage is supplied onto the mesh belt from the deinking drainage supply unit, and the deinking drainage is filtered while the mesh belt is driven to run by the belt driving unit. The filter cake remaining on the mesh belt is squeezed between the pressing roller and the rotating roller. This eliminates the need for large-scale equipment and enables operation with less energy. Moreover, there is almost no generation of vibration and noise, and efficient processing is possible in a short time.

In addition, according to the deinking drainage processing apparatus of the present invention, the filter cake scraping portion is provided, so that the mesh cake is clogged by scraping the filter cake to a predetermined position on the mesh belt by the scraping blade. It is possible to eliminate the filtration efficiency that is reduced due to clogging of the mesh.

According to the deinking drainage processing apparatus of the present invention, the rotating shaft is driven to rotate by the scraping drive unit, and the filter cake on the mesh belt is scraped by the scraping blade that contacts the upper surface of the mesh belt. It is possible to scrape the filter cake very efficiently by power, and it is possible to easily recover the filtration efficiency by the mesh belt.

Furthermore, according to the deinking drainage processing apparatus of the present invention, the squeezing roller that comes into contact with the rotating roller that squeezes the filter cake with the pressing roller at a predetermined pressure is provided. The water component is absorbed by the water absorbing member of the rotating roller, and the liquid absorbed by the water absorbing member can be squeezed by the squeezing roller, so that the efficiency of squeezing by the pressing roller and the rotating roller can be further improved.

Furthermore, according to the deinking drainage processing apparatus of the present invention, the guide is positioned on the mesh belt in the width direction center side of the mesh belt rather than the upstream end portion on the downstream side in the belt running direction. The filter cake can be guided and guided toward the center in the width direction as the mesh belt travels. Thereby, the layer thickness of the filter cake on the mesh belt can be set to a predetermined thickness suitable for pressing by the pressing roller.

Furthermore, according to the deinking / drainage processing device of the present invention, the intermittent running control function unit of the control unit temporarily stops the mesh belt when supplying the deinking / draining liquid from the deinking / draining liquid supply unit, The drainage can be retained in the vicinity of the outlet of the deinking drainage supply unit, and the layer thickness of the filter cake generated by the filtration can be more than a predetermined amount, so that the pressing with the pressing roller can be performed reliably. It becomes.

Furthermore, according to the deinking drainage processing apparatus of the present invention, even if the amount of deinking drainage supplied from the deinking drainage supply unit increases or decreases, the drainage amount detection means and the traveling speed control function By the action of the part, the amount of the filter cake remaining on the mesh belt can be made substantially constant, and the deinking waste liquid can be filtered under optimum filtration conditions.

Furthermore, according to the deinking drainage processing apparatus of the present invention, magnetic ink, magnetic toner, etc. contained in the filtrate can be adsorbed and collected by the magnetic substance inside the filtrate tank, and with a simple structure, It can suppress that a heavy metal is contained in the drainage discharged | emitted from a filtrate tank outside.

According to the deinking system of the present invention, deinking pulp can be obtained by deinking pulp fibers with a deinking apparatus, and deinking waste liquid generated by the deinking process can be obtained with a deinking waste liquid processing apparatus. It can be processed. Therefore, when manufacturing recycled paper using waste paper as a raw material, it is possible to prepare a raw material that enables the production of recycled paper with high whiteness, and to treat the waste liquid resulting from the deinking process. It is very efficient.

According to the deinking drainage processing method of the present invention, the deinking drainage can be separated into solid and liquid by filtration to easily separate the pulp fibers contained in the deinking drainage, and on the mesh belt. By squeezing the remaining filter cake between the rotary roller and the press roller, the disposal of the filter cake becomes easy.

It is the schematic which shows the structure of the used paper reproduction | regeneration processing apparatus which concerns on one Embodiment of this invention. It is the schematic which shows the internal structure of the used paper pulp liquid manufacturing part of the used paper recycling processing apparatus. It is a perspective view of the deinking system of the same used paper recycling apparatus. It is the top view and sectional drawing of the deinking system. It is a perspective view of the deinking drainage processing apparatus of the used paper recycling processing apparatus. It is a block diagram of the control part of the deinking drainage processing apparatus. It is a top view of the deinking drainage processing apparatus. It is sectional drawing of the same deinking drainage processing apparatus. It is an enlarged view of the filter scraping part of the deinking drainage processing apparatus. It is the schematic of the paper making part of the used paper reproduction | regeneration processing apparatus. It is the schematic which shows the principal part of the deinking drainage processing apparatus concerning the 2nd Embodiment of this invention.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration of a used paper recycling apparatus according to the present invention. In FIG. 1, a used paper recycling apparatus 100 integrally includes a used paper pulp liquid production unit 1, a deinking pulp unit 2, a paper making unit 3, and a finishing unit 4.

The waste paper pulp liquid production unit 1 separates the waste paper 6 to produce waste paper pulp liquid, and the deinking pulp part 2 deinks the waste paper pulp liquid produced in the waste paper pulp liquid production part 1. The paper making unit 3 makes the deinked pulp obtained in the deinking pulp unit 2 and dehydrates and dries the wet paper obtained by the paper making. The finishing unit 4 performs the wet paper drying in the paper making unit 3. The finished paper is finished by cutting or the like, and the recycled paper 7 is obtained.
(Waste Paper Pulp Production Department)
FIG. 2 is a schematic diagram showing the internal structure of the waste paper pulp liquid production unit 1. In FIG. 2, the used paper pulp liquid manufacturing unit 1 has a used paper input unit 11 for inputting used paper 6, and a pulper 18 is provided below the used paper input unit 11.

The pulper 18 is used to disintegrate waste paper 6 or a cut piece of waste paper 6 (not shown) into pulp fibers, that is, waste paper pulp, in a liquid of water and a disaggregation accelerator to obtain a waste paper pulp liquid. Here, the used paper pulp liquid is a suspension containing the used paper pulp, and the used paper pulp liquid stored in the pulper 18 of the used paper pulp liquid manufacturing unit 1 was taken out into the water by the used paper during the disaggregation. A coloring component for printing such as an ink component and a toner component and a disaggregation accelerator are dissolved or mixed.

The pulper 18 is provided with a stirring tank 181 for feeding waste paper 6 and the like, a water supply unit 182 for supplying water to the stirring tank 181, and a disaggregation accelerator supply unit 183 for supplying a disaggregation accelerator to the stirring tank 181. The disaggregation accelerator supplied from the disaggregation accelerator supplying unit 183 promotes disaggregation of the waste paper 6, and sodium hydroxide, sodium carbonate, etc. can be used, and sulfamic acid, hydrochloric acid, sulfuric acid, phosphoric acid, sulfuric acid can be used. Acids such as aluminum, oxidizing agents such as sodium hypochlorite, sodium chlorite, and hydrogen peroxide, surfactants, bleaching agents, PH stabilizers, chelating agents, dispersing agents, and the like can be used supplementarily.

The pulper 18 has a stirring blade 184 at the inner bottom portion of the stirring tank 181, and has a driving means 188 such as a motor for rotationally driving the stirring blade 184 at the outer bottom portion of the stirring tank 181, and water is supplied from the water supply unit 182. The waste paper 6 and the like together with the water are agitated by the rotation of the agitating blade 184 to be separated. Further, a used paper pulp liquid take-out section 187 for taking out the used paper pulp liquid is provided at the bottom of the outside of the stirring tank 181.
(Deinking pulp section)
As shown in FIG. 1, the deinking pulp unit 2 includes a pre-deinking diluting unit 21 and a deinking system 22, and the deinking system 22 includes a deinking processing device 51 and a deinking drainage processing device 52. Yes. A transfer section (not shown) including a pipe, a pump, and the like is provided between the sections.

The pre-deinking diluting section 21 is a fiber concentration suitable for deinking the waste paper pulp liquid sent from the pulper 18, here about 0.1 wt% to 5.0 wt%, more preferably 0.3 wt% to The liquid is diluted to about 2.0% by weight, and is provided with a diluting liquid supply unit (not shown) for supplying diluting water, a surfactant as a deinking agent, and the like.

When the fiber concentration is 0.1 wt% to 5.0 wt%, the printing ink components and the toner components such as the ink component and the toner component are efficiently brought into contact with the deinking agent in the subsequent deinking system 22 for printing. Coloring components and the like can be easily removed.

FIG. 3 shows a perspective view of the deinking processing device 51 of the deinking system 22, FIG. 4 (a) shows a plan view of the deinking processing device 51, and FIG. 4 (b) shows A in FIG. 4 (a). A cross-sectional view taken along line A is shown.

The deinking treatment device 51 separates and removes printing coloring components such as ink components and toner components dissolved or mixed in the used paper pulp liquid to produce deinked pulp, and the used paper pulp liquid circulation tank 221. A blade 222 and a foam receiving tank 223 are provided.

The used paper pulp liquid distribution tank 221 distributes the used paper pulp liquid adjusted to a predetermined concentration by supplying the diluent in the pre-deinking dilution unit 21. The waste paper pulp liquid circulation tank 221 is partitioned into a plurality of deinking chambers 225 by a plurality of partition walls 224, and the plurality of partition walls 224 are alternately arranged at the left end as shown in FIG. Alternatively, all the deinking chambers 225 communicate with each other by opening at the right end. At the bottom of each deinking chamber 225, a bubble supply unit 226 is provided for supplying fine bubbles into the used paper pulp liquid flowing in the used paper pulp liquid circulation tank 221.

Further, in the waste paper pulp liquid circulation tank 221, a stirring blade (shown) that stirs the stagnant waste paper pulp liquid at a predetermined position where the flow rate of the waste paper pulp liquid decreases and the waste paper pulp liquid easily stagnates and flows downstream. (Omitted).

There are various types of stirring blades, for example, there are structures having a plurality of blades arranged radially around the rotation axis. Further, the used paper pulp liquid distribution tank 221 has an inflow portion 229a for allowing the used paper pulp liquid to flow into the tank and a used paper pulp liquid (deinked pulp liquid) containing deinked pulp generated by the deinking process. An outflow portion 229b that flows out of the tank 221 is provided.

Further, the used paper pulp liquid circulation tank 221 is provided with a temperature sensor 227 for detecting the temperature of the used paper pulp liquid in each deinking chamber 225 and a heater 228 on the front and rear surfaces of the partition wall 224, respectively. However, in the case where temperature management of used paper pulp liquid is not performed, the temperature sensor 227 and the heater 228 may not be provided.

The blade 222 provided above the used paper pulp liquid circulation tank 221 is for sweeping bubbles floating above the used paper pulp liquid circulation tank 221 to overflow the peripheral wall of the used paper pulp liquid circulation tank 221 to the foam receiving tank 223 side. Yes, it is driven by the motor 222a and reciprocated while being guided by the guide rail 222b.

As shown in FIG. 4 (a), the foam receiving tank 223 has a rectangular shape in plan view and is provided so as to surround the outer periphery of the used paper pulp liquid circulation tank 221, and is swept by the blade 222 from the used paper pulp liquid circulation tank 221. Receiving bubbles that have been taken out and temporarily storing them. As shown in FIGS. 3 and 4 (b), the foam receiving tank 223 has an antifoaming liquid ejection part 223 a for ejecting an antifoaming liquid such as water for washing away bubbles attached to the inner wall surface of the foam receiving tank 223. Provided. The defoaming liquid ejection portions 223a are provided at a plurality of locations at appropriate intervals over the entire circumference of the inner wall surface on the upper and middle portions of the inner wall surface of the foam receiving tank 223.

Furthermore, the bubble receiving tank 223 includes a wind supply unit (not shown) that blows off the moisture of the bubbles by blowing warm air or hot air to the bubbles stored inside, and the like at the bottom of the tank. Has an outflow part 75 for taking out the deinking drainage liquid accumulated in the bubble receiving tank 223 and letting it flow out to the deinking drainage processing apparatus 52 described later.

Below the deinking processing device 51, a deinking drainage processing device 52 for processing the deinking drainage collected in the foam receiving tank 223 is provided. In addition to the deinking drainage liquid, the foam receiving tank 223 includes a defoaming liquid ejected from the defoaming liquid ejecting portion 223a, a liquid containing a printing coloring component such as an ink component or a toner component generated by the disappearance of bubbles, A liquid containing fine waste paper pulp overflowing from the waste paper pulp liquid circulation tank 221 together with the foam is collected.

5 is a perspective view of the deinking / drainage processing device 52, FIG. 6 is a block diagram of a control unit of the deinking / draining processing device, FIG. 7 is a plan view of the deinking / draining processing device 52, and FIG. 7 is a cross-sectional view taken along the line BB of FIG. 7, and FIG.

The deinking / drainage processing device 52 includes an endless mesh belt 57 stretched around a plurality of rotating rollers 55 and a belt driving unit that drives at least one rotating roller 55 among the plurality of rotating rollers 55 (see FIG. 5, 7, and 8), and a deinking drainage supply unit 56 that supplies deinking drainage above the mesh belt 57 and at least one rotating roller among the plurality of rotating rollers. Is provided with a pressing roller 59 arranged opposite to the squeezing roller.

The mesh belt 57 filters the deinked waste liquid. The mesh of the mesh belt 57 is rough enough to substantially separate the waste paper pulp contained in the deinked waste liquid, and is 10 mesh to 50 mesh. 20 mesh to 30 mesh is more preferable. It is possible to reduce the amount of waste paper pulp that passes through the mesh without being separated by being finer than 10 mesh, and the mesh due to waste paper pulp or the like becomes coarser to less than 50 mesh. Clogging is less likely to occur and the filtration efficiency can be improved.

FIG. 8 shows an example in which the upper mesh belt 57 is disposed substantially horizontally in a side view, but the present invention is not limited to this, and the mesh belt 57 may be disposed slightly inclined. When inclined, the mesh belt 57 is preferably arranged so that the downstream side in the traveling direction is slightly higher than the upstream side in the traveling direction. Thereby, even if the deinking waste liquid has a low viscosity because it contains almost no waste paper pulp, the deinking drainage supplied to the mesh belt 57 does not flow out to the downstream side vigorously, The deinking liquid can be retained on the mesh belt 57 for a required time and filtered.

The upper opening of the deinking drainage supply unit 56 is connected to the outflow part 75 of the foam receiving tank 223, and the deinking drainage liquid in the foam receiving tank 223 can be supplied onto the mesh belt 57. Further, a drainage amount detection means 91 such as a propeller for detecting the amount of deinking drainage supplied on the mesh belt 57 is provided.

The squeezing roller 59 sandwiches the mesh belt 57 between the rotating rollers 55a facing each other, and squeezes the filter cake remaining on the mesh belt 57. The pressing roller 59 has a smooth shape with an outer peripheral surface having less irregularities than the surface of the mesh belt 57, whereby the filter cake is transferred from the mesh belt 57 to the pressing roller 59 as it is pressed.

A transfer roller 58 is provided in rolling contact with the squeezing roller 59, and the filter cake transferred from the mesh belt 57 to the squeezing roller 59 is further transferred from the squeezing roller 59 to the transfer roller 58. A scraper 60 slidably contacting the outer peripheral surface of the pressing roller 59 is provided in the vicinity of the pressing roller 59, and the scraper 60 peels the filter cake from the pressing roller 59 and sends it to the transfer roller 58. Further, a scraper 76 that slides on the outer peripheral surface of the transfer roller 58 is provided in the vicinity of the transfer roller 58, and the scraper 76 peels the filter cake from the transfer roller 58.

A rotating roller 55 a is disposed at a position opposite to the pressing roller 59. The rotating roller 55a squeezes the filter cake on the mesh belt 57 with the squeezing roller 59, and the outer peripheral portion is made of a water absorbing member 96 such as sponge, felt, non-woven fabric or the like. Further, a squeezing roller 78 is provided in rolling contact with the rotating roller 55 with a predetermined pressure, and the squeezing roller 78 squeezes out water absorbed by the water absorbing member 96 of the rotating roller 55.

As shown in FIG. 7, a pair of guides 66 extending in the belt traveling direction along the upper surface of the mesh belt 57 are provided on the left and right side edges in the width direction of the mesh belt 57. The guide 66 is inclined with respect to the belt traveling direction in plan view, and the downstream end in the belt traveling direction is located closer to the center in the width direction of the mesh belt 57 than the upstream end in the belt traveling direction. Accordingly, the distance w2 between the guides 66 on the downstream side in the traveling direction is smaller than the distance w1 between the guides 66 on the upstream side in the traveling direction of the mesh belt 57, and the conveyance path width W between the pair of guides 66 is the belt traveling. It becomes narrower gradually as it goes downstream in the direction.

The guide 66 may be provided on at least one of the side edges in the width direction of the mesh belt 57, and may be disposed in sliding contact with the upper surface of the mesh belt 57. You may arrange | position in the upper part slightly spaced apart from 57. FIG.

A filter scraping portion 61 is provided above the mesh belt 57, that is, above the upper outbound path of the circular orbit formed by the mesh belt 57. The filter cake scraping unit 61 is located downstream of the deinking drainage supply unit 56 in the traveling direction of the mesh belt 57, and scrapes the filter cake on the mesh belt 57 by a predetermined amount.

As shown in FIGS. 9, 5, and 8, the filter scraping portion 61 rotates the rotating shaft 64, four scraping blades 62 provided radially around the axis of the rotating shaft 64, and the rotating shaft 64. A scraping drive unit 63 for driving is provided.

The scraping blade 62 is formed of a substantially rectangular thin plate having a main body portion extending in the axial direction of the rotation shaft 64, and a tip portion contacting the upper surface of the mesh belt 57 is made of synthetic resin such as PET, PP, PE, or aluminum. It is made of a material having flexibility or elasticity such as a metal thin plate such as stainless steel. The scraping blade 62 rotates at a predetermined rotational speed as the rotary shaft 64 rotates, and the tip portion moves in a state of contacting the upper surface of the mesh belt 57 with a predetermined pressure to filter the mesh belt 57. Scraping by a predetermined amount.

The scraping drive unit 63 is configured by a motor or the like separately from the belt drive unit of the mesh belt 57, and is controlled to rotate the scraping blade 62 at a speed different from the traveling speed of the mesh belt 57. It is preferable to do. However, the scraping drive unit 63 can also be configured to double as the belt drive unit of the mesh belt 57.

Below the forward path on the upper side of the mesh belt 57, a plurality of blades 77 for draining the deinking drainage liquid are arranged at predetermined intervals in the belt traveling direction, and each blade 77 is directed in a direction intersecting the belt traveling direction. In addition, they are arranged in sliding contact with the lower surface of the mesh belt 57. A rotating brush 79 is provided between the blades 77, and the rotating brush 79 is rotated by driving the scraping drive unit 63 of the filter scraping unit 61, and comes into contact with the lower surface of the mesh belt 57 to discharge deinking liquid. Drain the water.

A guide tray 70 is provided in the inside of the orbit of the mesh belt 57. The guide tray 70 receives the filtrate of the deinking waste liquid filtered by the mesh belt 57 and guides it to the filtrate tank 71 provided below. is there. The guide tray 70 is formed between a pair of first trays 67 provided on the upstream side in the belt traveling direction and on the downstream side in the belt traveling direction on the forward path on the upper side of the mesh belt 57, and between the opposing ends of the pair of first trays 67. A second saucer 68 provided at the lower position and a third saucer 69 provided below the return path on the lower side of the mesh belt 57 are provided.

The pair of first saucers 67 are inclined downward toward the second saucer 68, and the second saucer 68 receives the filtrate flowing down from the first saucer 67. The first tray 67 has a rectangular shape in a plan view, and has side walls provided along the belt running direction at edges corresponding to the left and right side edges of the mesh belt 57. The second saucer 68 is V-shaped in a side view, and openings 68 a for allowing the filtrate inside to flow down to the filtrate tank 71 are provided at both ends in the longitudinal direction of the second saucer 68.

The third saucer 69 of the guide saucer 70 is inclined downward toward the filtrate tank 71 and guides the filtrate flowing down from the mesh belt 57 to the filtrate tank 71 at the end of the forward path.

Below the return path of the mesh belt 57, a filtrate tank 71 for storing the filtrate filtered by the mesh belt 57 and a filter cake storage box 72 for storing the filter cake peeled off from the transfer roller 58 by the scraper 76 are provided. The filter cake storage box 72 has an upper opening.

In the filtrate tank 71, a thin plate-like magnetic body 73 is disposed on the inner bottom surface, and a discharge portion 97 for discharging the filtrate stored in the filtrate tank 71 to the outside is provided at the bottom of the bottom surface portion. A water level sensor 74 for detecting the water level is provided at the upper position of the side wall of the filtrate tank 71.

As shown in FIG. 6, the deinking / drainage processing device 52 includes a control unit 95 that controls the operation of the belt driving unit 98, and the control unit 95 repeats running and temporary stop of the mesh belt 57 intermittently. An intermittent travel control function unit 92 that causes the mesh belt 57 to travel, a travel speed control function unit 93 that changes the travel speed of the mesh belt 57 based on the deinking drainage amount detected by the drainage amount detection means 91, A speed difference control function for controlling the belt driving unit 98 and the scraping driving unit 63 by providing a speed difference between the traveling speed of the mesh belt 57 and the moving speed of the tip of the scraping blade 62 that contacts the upper surface of the mesh belt 57. Part 94.
(Paper making)
FIG. 10 is a schematic perspective view of the paper making unit 3. The paper making unit 3 makes the deinked pulp that has been deinked by the deinking pulp unit 2 and dehydrates and dries the wet paper 64 that has been made. The head box 31, the wire unit 32, the dewatering unit 33, It consists of a dryer section 34.

The head box 31 is open at the top and is provided with a supply port 31a for waste paper pulp liquid on the bottom side, and cantilever-supports the guide member 31b at positions corresponding to both ends in the width direction of the supply port 31a. The guide member 31b has a predetermined length along both side edges of the papermaking wire 323, which will be described later, and the used paper pulp liquid supplied from the head box 31 onto the papermaking wire 323 outwards from the side edge of the papermaking wire 323. While preventing the paper from flowing down, the papermaking width of the wet paper 64 is maintained at a predetermined length.

The wire portion 32 is arranged so as to span a plurality of rotating rollers 321, and includes a papermaking wire 323 that forms an endless circular orbit, and a mesh of the papermaking wire 323 is provided inside the circular orbit of the papermaking wire 323. A water receiving portion 325 for receiving water flowing down from the water is provided.

The water receiving unit 325 is connected to a white water tank (not shown), and the white water tank is connected to the pulper 18 and the pre-deinking diluting unit 21 by a pipe and a pump so that the white water in the white water tank is circulated and used. Is realized.

The dewatering unit 33 has a pair of upper and lower endless water-absorbing

belts

332 a and 332 b made of felt, and the water-absorbing

belts

332 a and 332 b are respectively arranged between a plurality of rotating rollers 331.

The upper water-absorbing belt 332a and the lower water-absorbing belt 332b are in contact with each other in a part of both tracks, and a plurality of dewatering rollers 334 are provided in the track section where the water-absorbing

belts

332a and 332b are in contact with each other. Yes. The plurality of dewatering rollers 334 are configured such that the upper dewatering roller 334a located in the inner circumference of the upper water-absorbing belt 332a and the lower dewatering roller 334b located in the inner circumference of the lower water-absorbing belt 332b face each other. The two

water absorbing belts

332a and 332b are sandwiched and pressed between the upper dewatering roller 334a and the lower dewatering roller 334b, and a plurality of sets of dewatering rollers 334a and 334b are arranged in multiple stages in the belt running direction. ing.

In the dryer section 34, a plurality of rotating rollers 351 and a drying roller 343 and a pair of upper and lower endless conveying belts 342 are arranged in a hood (not shown), and each conveying belt 342 has a plurality of rotating rollers 351, respectively. In addition, the upper and lower conveyor belts 342 are overlapped and arranged between the plurality of drying rollers 343. The drying roller 343 includes a heater 345 therein and a temperature sensor (not shown) that measures the temperature of the surface of the drying roller 343.

The material of the conveyance belt 342 is not particularly limited, and is, for example, cloth, heat resistant resin, metal, or the like. The upper and lower conveyor belts 342 run between the plurality of drying rollers 343 while being in contact with each other in a part of both tracks, and are subjected to a drying action by the drying rollers 343 during this time.
(Finishing part)
As shown in FIG. 10, the finishing unit 4 includes a calendar unit 41 and a cutting unit (not shown). The calendar unit 41 includes a plurality of press rollers 411 for increasing the flatness of the recycled paper 65 before finishing, and is cut. The section (not shown) includes a cutting blade (not shown) for cutting the recycled paper 65 before finishing into a predetermined sheet size.
(Operation of the first embodiment)
The operation of the used paper recycling apparatus 100 according to this embodiment will be described below. First, as shown in FIG. 2, a predetermined amount of used paper 6 whose weight has been measured in advance is introduced into the agitation tank 181 from the used paper input unit 11, and water in a proportion corresponding to the weight of the used waste paper 6 is added. And the disaggregation accelerator are supplied from the water supply part 182 and the disaggregation accelerator supply part 183 to the stirring tank 181.

Then, the stirring blade 184 is rotationally driven by the driving means 188, and the used paper 6 is stirred together with water and a disaggregation accelerator in the stirring tank 181 to produce a used paper pulp liquid. The produced waste paper pulp liquid is taken out from the waste paper pulp liquid take-out section 187 and sent to the deinking pulp section 2 as shown in FIG.

In the deinking pulp unit 2, first, dilution water and a surfactant as a deinking agent are introduced from the diluting solution supply unit, and the used paper pulp solution is diluted to a fiber concentration suitable for deinking in the pre-deinking diluting unit 21. To do. Next, the waste paper pulp liquid adjusted to a predetermined fiber concentration is sent to the deinking system 22.

As shown in FIGS. 3 and 4, in the deinking system 22, the used paper pulp liquid flows into the used paper pulp liquid circulation tank 221 of the deinking processing device 51 from the inflow portion 229 a, and the used paper pulp liquid is left on the partition wall 224 or Sequentially flows from the right opening to the adjacent deinking chamber 225. In each deinking chamber 225, fine bubbles are blown from the bubble supply unit 226 into the waste paper pulp liquid in the presence of the deinking agent, and the toner is applied to the surface of the bubbles generated in large quantities without disappearing due to the presence of the deinking agent. Hydrophobic foreign matters such as particles are attached and floated on the top of each deinking chamber 225. The hydrophilic fibers sequentially flow through the deinking chamber 225 together with water. Further, if necessary, a stirring blade is operated to promote smooth circulation of the used paper pulp liquid in the used paper pulp distribution tank 221.

In this way, deinking is carried out by removing printing coloring components such as ink components and toner components from the waste paper pulp liquid. At that time, if necessary, the temperature sensor 227 may detect the temperature of the used paper pulp liquid to control the temperature. In the temperature control, the waste paper pulp liquid is heated by the heater 228 so as to maintain a predetermined temperature. The temperature management in the deinking apparatus 51 is not necessarily performed.

When a predetermined time elapses after the waste paper pulp liquid is introduced into the deinking processing device 51 and bubbles are floating above each deinking chamber 225 due to the progress of the deinking process, the motor 222a is driven to drive the guide rail 222b. 4A, the blade 222 is reciprocated in the vertical direction in FIG. 4A, and air bubbles floating above the used paper pulp liquid circulation tank 221 are swept out into the foam receiving tank 223. The bubbles swept out to the bubble receiving tank 223 are washed away by the defoaming liquid ejected from the defoaming liquid ejecting part 223a and accumulated in the lower part of the foam receiving tank 223.

The liquid accumulated in the bubble receiving tank 223 is deinking waste liquid generated by deinking, and is generated by deinking water, defoaming liquid, deinking agent, disaggregation accelerator, etc. added in the process. The liquid contains a coloring component for printing such as an ink component and a toner component, and also contains a portion of the used paper pulp overflowed from the used paper pulp liquid circulation tank 221. The amount of waste paper pulp contained in the deinking drainage liquid is obtained by subtracting the weight of the recycled paper 7 produced from the weight of the waste paper 6 used as a raw material and the weight of the paper piece cut and removed in the finishing section 4; It is about 10-30% of the total waste paper pulp.

This deinking drainage is sent from the bubble receiving tank 223 to the deinking drainage supply unit 56 of the deinking drainage processing device 52 through the outflow unit 75, and then on the mesh belt 57 that is driven to run by the belt driving unit. And filtered through the mesh of the mesh belt 57.

The squeezing roller 59 squeezes the filter cake on the mesh belt 57 with the rotating roller 55a. The rotating roller 55a absorbs the liquid component remaining in the filter cake with the water absorbing member 96 provided on the outer peripheral portion, and the rotating roller 55a Since the squeezing roller 78 that abuts at a predetermined pressure squeezes out the liquid absorbed by the water absorbing member 96, the squeezing effect by the squeezing roller 59 and the rotating roller 55a can be further improved.

When the mesh belt 57 travels, the plurality of blades 77 are in sliding contact with the lower surface of the mesh belt 57, and the rotating brush 79 enters the mesh from below the mesh belt 57 to lower the liquid component of the deinking waste liquid on the mesh belt 57. Therefore, it is possible to further improve the filtration efficiency.

Also, the guide 66 prevents the deinking drainage from flowing down from the side of the mesh belt 57. The guide 66 is inclined in a plan view, and the downstream end of the mesh belt 57 in the belt traveling direction is located closer to the center in the width direction of the mesh belt than the upstream end of the belt traveling direction. As the mesh belt 57 travels, the filter cake on the mesh belt 57 is guided and guided to the center in the width direction. As a result, the filter cake is collected on the center side in the width direction of the mesh belt 57, and the layer thickness of the filter cake is set to a predetermined thickness or more, so that the squeezing by the squeezing roller 59 can be sufficiently performed.

The filter cake remaining on the mesh belt 57 is waste paper pulp contained in the deinking waste liquid, a coloring component for printing adhered to or soaked into the waste paper pulp, and the filter cake easily causes the mesh belt 57 to be clogged. Is in a state. Therefore, as shown in FIG. 9, the filter cake scraping portion 61 scrapes the filter cake 99 on the mesh belt 57 to a predetermined location on the upstream side or the downstream side to eliminate clogging of the mesh, thereby reducing the filtration. Efficiency can be restored.

More specifically, when the rotary shaft 64 is driven to rotate by the scraping drive unit 63, the scraping blade 62 contacts the upper surface of the mesh belt 57 and scrapes the filter cake on the mesh belt 57. Since the tip portion of the scraping blade 62 is made of a flexible synthetic resin such as PET, PP, PE, etc., the tip portion of the scraping blade 62 is easily bent when contacting the mesh belt 57. The filter cake can be scraped efficiently without damaging the mesh belt 57.

The speed difference control function unit 94 controls the belt driving unit 98 and the scraping driving unit 63 to generate a speed difference between the traveling speed of the mesh belt 57 and the speed of the tip of the scraping blade 62. Due to this speed difference, the filter cake on the mesh belt 57 can be scraped to the upstream side or the downstream side in the belt running direction of the mesh belt 57 to form a lump. Thus, the filter cake can be sufficiently squeezed by the squeezing roller 59 by making the cake cake a lump.

In particular, due to the speed difference between the mesh belt 57 and the tip of the scraping blade 62, the speed of the tip of the scraping blade 62 that contacts the upper surface of the mesh belt 57 is faster than the traveling speed of the mesh belt 57. In this case, it is possible to quickly scrape the filter cake such as waste paper pulp clogged in the mesh belt 57 to the downstream side of the mesh belt 57, and the scraping blade 62 repeatedly contacts the upper surface of the mesh belt 57, Furthermore, clogging can be eliminated efficiently.

For example, when the length from the axial center of the rotating shaft 64 to the tip of the scraping blade 62, that is, the rotation radius of the filter scraping portion 61 is 5 cm, the traveling speed of the mesh belt 57 is 2.5 mm / second. If the rotational speed of the rotary shaft 64 is set to about 0.75 rps, the speed of the tip of the scraping blade 62 is about 23.6 mm / second, which causes a very large speed difference. . In this case, since the rotating shaft 64 rotates by three quarters per second, the three scraping blades 62 sequentially contact the upper surface of the mesh belt 57, and the filter cake on the mesh belt 57 is repeatedly scraped upstream. It can be made into a lump.

Further, the intermittent travel control function unit 92 controls the belt drive unit 98 to cause the mesh belt 57 to travel for a predetermined time, and then temporarily stops to perform intermittent travel. For example, after moving the mesh belt 57 for 20 seconds, the operation of stopping for 1 minute is repeated. Accordingly, the deinking liquid supplied from the deinking liquid supply unit 56 is supplied to the vicinity of the outlet of the deinking liquid supply unit 56 depending on the traveling speed of the mesh belt 57 and the supply amount of the deinking liquid. The layer thickness of the filter cake obtained by filtration can be made a predetermined amount or more that can be reliably squeezed by the squeezing roller 59.

When intermittent running by the intermittent running control function unit 92 is performed, the mesh cake is clogged even when the mesh belt 57 is stopped by simultaneously scraping the filter cake by the above-described filter cake scraping unit 61. The deinking drainage can be filtered efficiently without any problem. Further, when the rotating brush 79 is rotated, even when the mesh belt 57 is stopped, the rotating brush 79 enters the mesh while being in contact with the lower surface of the mesh belt 57, and the liquid component of the deinking waste liquid is moved downward. Can be guided.

The traveling speed control function unit 93 changes the traveling speed of the mesh belt 57 based on the deinking drainage amount detected by the drainage amount detecting means 91. That is, a predetermined amount is set in advance as the normal supply amount of the deinking drainage liquid supplied from the deinking drainage supply unit 56 onto the mesh belt 57, and the normal running speed of the mesh belt 57 when the normal supply amount is supplied. A predetermined speed is determined in advance.

When the supply amount of the deinking drainage detected by the drainage amount detecting means 91 is larger than the predetermined amount determined as the normal supply amount during operation, the predetermined traveling speed of the mesh belt 57 is determined as the normal traveling speed. Control is performed faster than the speed, and conversely, if it is less than the predetermined amount, the traveling speed of the mesh belt 57 is controlled slower than the predetermined speed.

Thereby, even when the amount of deinking drainage supplied from the deinking drainage supply unit 56 increases or decreases, the amount of filter cake remaining on the mesh belt 57 can be made substantially constant, The deinked effluent can be filtered under optimum filtration conditions.

For this reason, even when the supply amount of the deinking drainage supplied from the deinking drainage supply unit 56 exceeds the appropriate amount that can be filtered by the mesh belt 57, the used paper contained in the deinking drainage There is no event that the pulp gets over the guide 66 and flows down from the side of the mesh belt 57 to the guide tray 70 or the filtrate tank 71 and clogs the pipes and valves on the downstream side of the filtrate tank.

On the other hand, even when the supply amount of the deinking waste liquid supplied from the deinking drainage supply unit 56 is too small, the layer of the filter cake becomes very thin and the filter cake 59 is sufficiently squeezed. The transfer of the filter cake to the squeezing roller 59 becomes incomplete and the mesh belt 57 is repeatedly attached around the mesh belt 57, or the filter cake enters the mesh belt 57 and is removed. Does not become difficult.

For the three controls of the control unit 95, that is, the speed difference control function unit 94, the intermittent travel control function unit 92, and the travel speed control function unit 93, only one of them may be performed alone, or two or more controls are combined. May be used. By performing the combined control, it is possible to perform filtration more efficiently by a synergistic effect, and the resulting filter cake can be efficiently squeezed by the squeezing roller 59.

The filter cake is transferred from the upper surface of the mesh belt 57 to the squeezing roller 59 by sandwiching and squeezing the filter cake on the mesh belt 57 by the squeezing roller 59 and the rotating roller 55a at the downstream end of the forward path of the mesh belt 57. Then, the pressing roller 59 around which the filter cake is wound is rotated and peeled off by the scraper 60. Subsequently, the filter cake is transferred to the transfer roller 58, the transfer roller 58 is rotated, and the filter cake is peeled off from the transfer roller 58 by the downstream scraper 76. The peeled filter cake is dropped into the filter cake storage box 72 and stored.

On the other hand, the filtrate produced by filtering the deinking drainage fluid through the mesh belt 57 reaches the first tray 67 and is guided along the inclination of the first tray 67 toward the center of the mesh belt 57 in the belt running direction. Then, it flows down to the second saucer 68, reaches both edges in the longitudinal direction of the second saucer 68, and then flows down to the filtrate tank 71 from the opening 68a.

Since the magnetic substance 73 is disposed in the filtrate tank 71, the magnetic ink and magnetic toner contained in the filtrate are adsorbed and collected by the magnetic substance 73, so that the filtrate tank 71 passes through the outflow part 97. The drainage discharged to the outside can be made into a state in which heavy metals are not included.

In the filtrate tank 71, the water level sensor 74 detects that the amount of the filtrate stored in the filtrate tank 71 has reached the upper position, and the control unit 95 discharges the liquid in the filtrate tank 71 in response to the detection of the water level sensor 74. Is discharged from the outflow unit 97 to the outside of the used paper recycling apparatus 100.

On the other hand, in the deinking processing device 51, the used paper pulp liquid is distributed to all the deinking chambers 225 in the used paper pulp liquid distribution tank 221 to deink the used paper pulp liquid to obtain deinked pulp. The obtained deinked pulp liquid containing the deinked pulp is discharged from the outflow part 229b and sent to the papermaking unit 3.

In the paper making unit 3, a deinked pulp liquid containing deinked pulp after deinking is supplied from the head box 31 onto the traveling paper making wire 323, and the deinked pulp liquid is guided onto the paper making wire 323 while being guided by the guide member 31b. The wet paper 64, which is a fiber layer containing a relatively large amount of moisture, is formed by uniformly supplying and draining the deinked pulp liquid with the papermaking wire 323.

The water flowing down below the papermaking wire 323 is received by the water receiving unit 325 and sent from the water receiving unit 325 to the white water tank.

The wet paper 64 on the paper making wire 323 is transferred to the water absorbing belt 332a on the upper side of the dewatering unit 33 when reaching the end of the forward path. Thereafter, the wet paper 64 is sandwiched between the lower water absorption belt 332b, the moisture contained in the wet paper 64 is absorbed to the

water absorption belts

332a and 332b, and dehydrated, and further sandwiched and pressed by the dewatering rollers 334a and 334b. And dehydrate.

The wet paper 64 dehydrated by the dewatering unit 33 is sent to the dryer unit 34 and is sandwiched between a pair of upper and lower transport belts 342 that travel. The wet paper 64 is conveyed by the conveyance belt 342 while the wet paper 64 is brought into contact with the plurality of drying rollers 343 heated by the heater 345 and maintained at a predetermined temperature via the conveyance belt 342. The recycled paper 65 before finishing is obtained.

The recycled paper 65 before finishing that exits the dryer section 34 is sent to the calendar section 41 and is passed between a plurality of press rollers 411 to improve the flatness of the recycled paper 65 before finishing. The recycled paper 7 is completed by cutting into sizes.

The broken material which became unnecessary by cutting the recycled paper 65 before finishing in a cut part is returned to the used paper pulp liquid production part 1 as shown in FIG. 1, and is again used as a raw material.

As described above, in the deinking drainage processing apparatus 52 according to the first embodiment, the deinking drainage separated from the used paper pulp by deinking the used paper pulp is sent from the deinking drainage supply unit 56. It is supplied onto the mesh belt 57 and filtered while the mesh belt 57 is running, and the filter cake remaining on the mesh belt 57 is sandwiched between the squeezing roller 59 and the rotating roller 55 and squeezed.

Thereby, solid content such as waste paper pulp contained in the deinking waste liquid can be easily filtered from a liquid such as water and compressed. Therefore, it is possible to prevent a problem that waste paper pulp or the like is clogged in the pipe when discarding the deinking waste liquid, eliminating the need for large-scale equipment and being able to operate with less energy. Furthermore, there is almost no generation of vibration and noise, and efficient processing is possible in a short time.

In addition, the deinking system 22 according to the first embodiment can deinked waste paper pulp by the deinking drainage processing device 52 to obtain deinked pulp, and the deinking drainage generated by the deinking process. Can be processed by a deinking waste liquid processing apparatus. Therefore, when producing recycled paper from waste paper, it is possible to produce a raw material that produces recycled paper with higher whiteness, and to separate and remove waste paper pulp from the waste liquid resulting from deinking treatment. It is possible to prevent problems such as clogging of piping due to waste paper pulp.
(Second Embodiment)
A second embodiment of the deinking drainage processing apparatus according to the present invention will be described below. FIG. 11 is a schematic configuration diagram illustrating a main part of a deinking / drainage processing apparatus 52A according to the second embodiment. In the second embodiment, mesh belts are provided in two upper and lower stages, and the filtrate of the first mesh belt 57a is sent to the second deinking drainage supply unit 56b through the guide pipe 70a to be on the second mesh belt 57b. By supplying to, the structure which can perform the filtration process of a filtrate twice is implemented.

By making the mesh size of the downstream second mesh belt 57b smaller than the mesh size of the upstream first mesh belt 57a, the second mesh belt 57b can make finer waste paper pulp or the like. Solids can be filtered off. Furthermore, by adding the filtration process by the circulating mesh belts 57a and 57b according to the second embodiment and setting it to 3 times or more, a finer solid content can be separated.

In addition, in each said embodiment, although the structure which provided the filter scraping part 61 was shown, the filter scraping part 61 does not necessarily need to provide. Further, the configuration of the filter scraping portion 61 is not limited to the above-described embodiment. For example, a plate-like scraping blade (not shown) is arranged along the belt traveling direction of the outward track, and the plate-like scraping portion 61 is arranged. It is also possible to provide the scraping blade so as to be able to reciprocate in the width direction of the mesh belt.

In this case, by reciprocating the scraping blade in the width direction of the mesh belt, it is possible to scrape the filter cake on the traveling mesh belt to the left and right sides which are the end portions in the width direction of the mesh belt.

In the above-described embodiment, four scraping blades 62 of the filter scraping portion 61 are used, but the number of scraping blades 62 may be one to three or five or more. The rotating roller 55a that squeezes the filter cake on the mesh belt 57 with the pressing roller 59 is provided with the water absorbing member 96 on the outer peripheral portion, but the water absorbing member is not necessarily required. In addition, the pair of guides 66 is configured to be inclined in a plan view, but the guides may be configured to extend in parallel to the side edge of the mesh belt, or only one guide may be provided. A configuration not provided is also possible.

In the above embodiment, the filtrate tank 71 is provided and the filtrate is temporarily stored in the filtrate tank 71. However, the filtrate may be immediately discharged to the outside after the filtration without providing the filtrate tank 71. .

Claims

A deinking drainage supply unit that supplies deinking drainage generated by deinking waste paper pulp liquid, an endless mesh belt that filters the deinking drainage, a plurality of rotating rollers that span the mesh belt, and a mesh A belt driving unit for driving the belt and at least one of the plurality of rotating rollers are disposed opposite to each other, and the mesh belt is sandwiched between the rotating rollers to compress the filter cake on the mesh belt. A deinking drainage treatment apparatus comprising a pressing roller for performing deinking.
2. The deinking discharge according to claim 1, further comprising a filter scraping portion above the mesh belt, wherein the filter scraping portion has a scraping blade for scraping the filter cake by a predetermined amount on the mesh belt. Liquid processing equipment.
The filter cake scraping section includes a rotation shaft, a plurality of scraping blades provided radially around the axis of the rotation shaft, and a scraping drive section that rotationally drives the rotation shaft. Deinking drainage treatment equipment.
2. The deinking / drainage processing apparatus according to claim 1, further comprising a squeezing roller that abuts the rotating roller facing the pressing roller with a predetermined pressure, and the rotating roller includes a water absorbing member at an outer peripheral portion. .
A guide extending in the belt traveling direction along the upper surface of the mesh belt is provided on at least one side edge portion of the both side edges in the width direction of the mesh belt, and the guide travels in the belt traveling direction in plan view. 2. The deinking discharge according to claim 1, wherein the downstream end portion in the belt traveling direction is located closer to the center side in the width direction of the mesh belt than the upstream end portion in the belt traveling direction. Liquid processing equipment.
2. A control unit that controls the operation of the belt drive unit, and the control unit includes an intermittent traveling control function unit that temporarily stops the mesh belt after traveling for a predetermined time and intermittently travels the mesh belt. The deinking drainage processing apparatus according to 1.
A control unit that controls the operation of the belt drive unit and a drainage amount detection unit that detects a deinking drainage amount supplied from the deinking drainage supply unit are provided, and the control unit is detected by the drainage amount detection unit The deinking / draining apparatus according to claim 1, further comprising a traveling speed control function unit that changes a traveling speed of the mesh belt based on a deinking / draining amount.
2. The deinking drainage treatment apparatus according to claim 1, further comprising a filtrate tank for storing a filtrate generated by filtering the deinking drainage liquid with a mesh belt, and the filtrate tank has a magnetic substance therein.
A deinking treatment device for deinking wastepaper pulp liquid to separate the deinking wastewater from the wastepaper pulp liquid and a deinking wastewater treatment device for processing the deinking wastewater separated by the deinking processing device are provided. 9. A deinking system, wherein the black ink draining apparatus comprises the deinking liquid draining apparatus according to any one of claims 1 to 8.
The mesh belt spanned by multiple rotating rollers is driven and driven by the belt drive unit, and the deinking waste liquid generated by the deinking of the waste paper pulp liquid is supplied from the deinking waste liquid supply unit onto the mesh belt, and filtered by the mesh belt. The deinking waste liquid is separated into solid and liquid, and the residue remaining on the mesh belt is squeezed between the squeezing roller disposed opposite to at least one of the rotating rollers and the rotating roller. Ink drainage treatment method.