JP2014084532A - Used paper regenerating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a used paper regenerating apparatus capable of producing regenerated paper which is conditioned so as to contain appropriate moisture at a time when being discharged from the apparatus.SOLUTION: In a used paper regenerating apparatus 1 which comprises: a pulper 9 for preparing regenerated pulp from used paper; a papermaking device 13 for forming a belt-like wet web 12; a drying device 14 which receives the belt-like wet web and dries the web; and a finishing part 15 which receives the dried belt-like paper and forms the paper into set specifications, the used paper regenerating apparatus 1 further has a steam supply device 66 for humidifying an atmosphere in a space region of the finishing part 15.

Description

  The present invention relates to a used paper recycling apparatus for manufacturing recycled paper from used paper.

Conventionally, as this kind of used paper recycling apparatus, there is one disclosed in Patent Document 1, for example.
This suppresses the generation of static electricity in the paper material conveyance path for conveying the paper material obtained by shredding waste paper from the storage unit to the pulper device, and the conveyance caused by the paper material adhering to the paper material conveyance path It is intended to suppress the occurrence of failures and prevent the static electricity from adversely affecting the electrical equipment of the used paper recycling apparatus.

  For this reason, the steam generated in the pulper device is supplied to the paper material transport path through the steam supply path, the atmosphere in the paper material transport path is humidified, and the humidity is increased to suppress the generation factor of static electricity. Is prevented.

JP2012-7246

  By the way, in the used paper recycling processing equipment that makes up a small paper machine of a size that can be installed in offices, etc., recycled pulp is generated from the used paper in the pulp section, wet paper is made from the recycled pulp in the paper making section, and wet paper is used in the finish. Recycled paper is manufactured as a dry paper by drying.

  When drying wet paper at the finish, the wet paper is heated and dried by a drying drum. The amount of heat (drum surface temperature) required to sufficiently dry the wet paper depends on properties such as the thickness of the wet paper. On the other hand, it is required to adjust the drum surface temperature to a low temperature for thin paper and to adjust the drum surface temperature to a high temperature for thick paper. Alternatively, it is required to adjust the time passing through the drying drum short for thin paper and to adjust the time passing through the drying drum long for thick paper.

However, if the temperature of the drying drum and the passage time (conveyance speed) are changed each time depending on the paper quality, there is a problem that productivity is lowered.
For this reason, the drum surface temperature of the drying drum is set to be equal to or higher than the temperature that gives the amount of heat necessary for drying the wet paper, and the dry paper at the completion of drying becomes in an over-dry state. This over-dried paper is prone to trouble when used in a printing machine, printer or the like. Generally, the paper is subjected to humidity control after its production to stabilize the paper quality. However, in the case of manufacturing recycled paper in a limited space office or the like, it is necessary to perform humidity conditioning work in the apparatus, but it is not possible to store the recycled paper in a certain amount and perform humidity conditioning work. It is difficult spatially.

  Further, in the process downstream of the drying drum, the atmosphere brought about by the heat brought in by the paper becomes dry, and static electricity is likely to be generated, which causes a problem such as paper jam in the paper transport path after the drying drum. .

  An object of the present invention is to provide a used paper recycling apparatus capable of producing recycled paper conditioned to an appropriate humidity when discharged from the apparatus.

  In order to achieve the above object, the used paper recycling apparatus of the present invention includes a pulp preparation unit for preparing recycled pulp from used paper, a paper making unit for making a belt-shaped wet paper, and a drying process for receiving and drying the belt-shaped wet paper. A waste paper recycling apparatus comprising a section and a finish that receives dried strip-shaped paper and shapes it into a set specification has a humidifying means for humidifying the atmosphere in the space area of the finish.

  Further, in the used paper recycling apparatus of the present invention, the humidifying means has a steam generation source for generating steam, and a steam conveyance path having one end communicating with the space area of the finish and the other end communicating with the steam generation source. It is characterized by.

  In the used paper recycling apparatus of the present invention, the steam generation source is at least one of a pulper device that disaggregates used paper in the pulp preparation unit and a drying device that dries wet paper in the drying unit.

Further, in the used paper recycling apparatus of the present invention, the humidifying means has a blower in a steam generation source or a steam transport path.
In the used paper recycling apparatus of the present invention, the drying unit dries the wet paper so that the moisture content of the paper that has passed through the drying unit is lower than the moisture content of the paper that has passed through the finish. And

In the used paper recycling apparatus of the present invention, the humidifying means includes a steam supply amount adjusting means for adjusting the amount of steam supplied to the space area of the finish.
In the used paper recycling apparatus of the present invention, the steam supply amount adjusting means adjusts the ratio between the amount of steam supplied to the finish through the steam transport path and the amount of steam exhausted to the outside of the steam transport path. It is characterized by doing.

  Further, in the used paper recycling apparatus of the present invention, the steam supply amount adjustment means uses the temperature or humidity of the atmosphere in the space area of the finish or the heating temperature of the drying device that dries the wet paper in the drying section as an index. The amount of steam supplied to the space region is adjusted.

  As described above, according to the present invention, by humidifying the atmosphere in the space area of the finish by the humidifying means, the dried paper absorbs moisture while passing through the finish, and the paper is adjusted to an appropriate humidity one by one. It can be discharged from the finish when wet.

  For this reason, even when recycled paper is manufactured in a limited space office, etc., humidity control is performed in the device to stabilize the paper quality, so the paper discharged from the used paper recycling processor can be printed immediately. Can be used with a printing machine, printer, etc., and troubles with a printing machine, printer, etc. can be prevented.

By humidifying the space area of the finish, the occurrence of static electricity in the finish is suppressed, and the occurrence of troubles such as paper jams in the paper transport path after the drying drum is suppressed.
Further, the steam can be positively supplied to the finish by the blower to reliably humidify the space area of the finish.

Further, by adjusting the moisture content of the paper in the drying section on the assumption that the paper absorbs moisture at the finish, it is possible to prevent the moisture content of the paper from becoming excessive at the finish.
In addition, the steam supply amount adjustment means can supply only the required amount of steam, and the amount of steam supply can be adjusted according to the thickness, quality, etc. of the paper, or the type of additive chemicals contained in the paper. can do.

  In addition, the steam supply amount adjusting means adjusts the amount of steam supplied to the finishing space area using the temperature or humidity of the atmosphere in the finishing space area or the heating temperature of the drying device that dries the wet paper in the drying section as an index. Therefore, it is possible to supply only a necessary amount of steam according to the environmental conditions for each season, such as in winter when the atmosphere is dry and in summer when the atmosphere is humid.

Schematic which shows the structure of the first half process of the used paper reproduction | regeneration processing apparatus in embodiment of this invention. Schematic showing the configuration of the second half process of waste paper recycling processing equipment Schematic which shows the structure of the first half process of the used paper reproduction | regeneration processing apparatus in other embodiment of this invention. Schematic showing the configuration of the second half process of waste paper recycling processing equipment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
1 and 2 are schematic views showing the configuration of the used paper recycling processing apparatus 1. The used paper recycling apparatus 1 receives a pulp preparation unit for preparing recycled pulp from used paper, a paper making unit for making a belt-like wet paper, a drying unit for receiving and drying the belt-like wet paper, and a dried belt-like paper It is a compact one that has an integrated finish that is shaped to set specifications.

  The pulp preparation unit includes a storage unit 3 that stores the paper material 2 that is shredded waste paper, a paper feeding device 5 that supplies the waste paper 4 to the storage unit 3, and a paper material 2 stored in the storage unit 3. A discharge cyclone 7 to be discharged to the measuring unit 6, a paper material transfer duct 16 to transfer the paper material 2 of the storage unit 3 to the discharge cyclone 7, and supply air to the paper material transfer duct 16 to supply the storage unit 3 A blower 18 for generating an air flow 17 that flows from the water to the discharge cyclone 7, a pulper device 9 for separating the paper material 2 weighed in the weighing unit 6 to produce a pulp suspension 8, and a pulper device 9 And a deinking device 11 for deinking the pulp suspension 8 stored in the storage tank 10.

The paper making unit has a paper making device 13 for making the wet paper 12 by making the deinked pulp suspension 8 and a dehydrating device 20 for dehydrating the wet paper 12.
The drying unit includes a drying device 14 that dries the dehydrated wet paper 12.

The finishing unit 15 performs a finishing process on the dry paper obtained by drying the wet paper 12, and turns the dry paper into a sheet 61.
The storage unit 3, paper feeding device 5, discharge cyclone 7, paper material transport duct 16, blower device 18, pulper device 9, storage tank 10, deinking device 11, etc. The paper making apparatus 13, the dehydrating apparatus 20, the drying apparatus 14, the finishing section 15 and the like are stored in a second casing 41 installed at the rear part of the used paper recycling apparatus 1. Yes.

  The storage unit 3 includes a paper shredding machine 21 that shreds the used paper 4 supplied from the paper feeder 5, a storage container 22 that stores the paper material 2 made of the shredded waste paper 4, It has a delivery device 23 for delivering the paper material 2 downward, and a dispersion cyclone 24 for dispersing the delivered paper material 2. One end of the paper material transport duct 16 is connected to a discharge port 26 formed in the dispersing cyclone 24, and the other end of the paper material transport duct 16 is connected to an inflow port 27 formed in the discharge cyclone 7.

  The blower 18 has a discharge port 28 and a suction port 29, one end of the air supply duct 31 is connected to the discharge port 28, and the other end of the air supply duct 31 is formed in the dispersion cyclone 24. Connected to the inlet 32. Accordingly, the discharge port 28 of the blower 18 communicates with the paper material transport duct 16 through the air supply duct 31 and the dispersion cyclone 24.

  The discharge cyclone 7 is formed with an air flow discharge port 34 for discharging the air flow 17 flowing in from the flow inlet 27, and one end of an air supply return duct 35 (air supply return path) is connected to the air flow discharge port 34. The other end of the air return duct 35 is connected to the suction port 29 of the blower 18.

The pulper device 9 includes a pulper tank 37 and a stirring device 38 provided in the pulper tank 37.
The storage tank 10 has a stirring device 39 inside. The deinking device 11 includes a deinking tank 40 having a meandering flow path, and an air diffuser (not shown) that discharges a large number of bubbles from the lower portion of the deinking tank 40.

  The paper making apparatus 13 has a paper making wire 43 formed of a mesh belt wound around a plurality of rollers 42 and a head box 44 for supplying the deinked pulp suspension 8 onto the paper making wire 43. doing.

  The dehydrator 20 includes a plurality of rollers 46 and 46a and a water absorbing belt 47 made of felt wound around the rollers 46 and 46a. The wet paper 12 made from the pulp suspension 8 by the paper making device 13 is transferred from the paper making wire 43 to the water absorbing belt 47 and is absorbed and dehydrated by the water absorbing belt 47.

  The drying device 14 includes a drying drum 49 having a built-in heating device 48 (heater), and a steel first transport belt 51 is wound around the drying drum 49 and the plurality of rollers 50 and 50a. Further, a second resin belt 53 made of a mesh is wound around a plurality of rollers 52, and is rolled onto the surface of the wet paper 12 in the middle of drying with a predetermined pressure to smooth the surface of the paper 61. A calendar roller 54 is provided. The first conveyor belt 51 and the second conveyor belt 53 overlap on the outer peripheral surface of the drying drum 49, and the wet paper 12 is dried by being pressed against the drying drum 49 with the wet paper 12 sandwiched therebetween.

  A pair of rollers 46a and 50a are provided at positions facing each other as pressing rollers. The wet paper 12 is squeezed and dehydrated via the water absorbing belt 47 and the first conveying belt 51, and the wet paper 12 is absorbed by the water absorbing belt. A function of transferring from 47 to the first conveyor belt 51 is provided.

  The finishing unit 15 is provided with a metal cutter 60 or the like that cuts the belt-like paper 61 dried by the drying device 14 into a predetermined size to obtain a sheet 61 of paper. A paper discharge port 62 for discharging the paper 61 finished in the finish 15 after drying is formed on the downstream side of the finish 15 and at the rear end of the second casing 41.

  As shown in FIG. 2, the used paper recycling apparatus 1 has a humidifying means for supplying the steam generated in the drying apparatus 14 which is a steam generation source in the present embodiment to the space area of the finish 15 and humidifying the atmosphere. A steam supply device 66 is provided.

  The steam supply device 66 has a steam supply duct 67 having one end connected to the upper portion of the drying device 14 and the other end connected to the space region of the finish 15, and steam generated in the drying device 14. And a steam blower 68 that sucks and feeds the steam into the steam supply duct 67. The steam blower 68 is provided on the ceiling portion of the second casing 41 and faces the upper side of the drying device 14. In the middle of the steam supply duct 67, steam supply amount adjusting means 69 is provided.

  The space area of the finishing section 15 forms a sheet conveyance path 70 for conveying the sheet 61 dried by the drying device 14 to the sheet discharge port 62, and the steam supply duct 67 is the latter half of the sheet conveyance path 70 in which the cutter 60 and the like are arranged. The sheet 61 communicates with the front surface of the sheet 61.

Hereinafter, the operation of the above configuration will be described. The waste paper 4 supplied from the supply device 5 is shredded by a paper shredding machine 21 to become a paper material 2, and the paper material 2 is stored in a storage container 22.
By operating the air blower 18, the air flow 17 discharged from the discharge port 28 of the air blower 18 flows through the air feed duct 31 and flows into the dispersion cyclone 24 from the air flow inlet 32. The air flow 17 is discharged from the discharge port 26 of the dispersion cyclone 24, then flows through the paper material transport duct 16, flows into the discharge cyclone 7 from the inlet 27, and is supplied to the discharge cyclone 7. After being discharged from 34, it flows in the air return duct 35 and returns to the suction port 29 of the blower 18.

  As a result, a circulation path is formed in which the air flow 17 flows from the discharge port 28 of the blower 18 through the air supply duct 31, the paper material transport duct 16, and the air supply return duct 35, returns to the suction port 29, and flows out from the discharge port 28 again. Is done.

  In this state, by operating the delivery device 23, the paper material 2 in the storage container 22 is sent out to the dispersion cyclone 24 and dispersed in the dispersion cyclone 24, and is further carried by the airflow 17 to make the paper material. It passes through the inside of the transport duct 16 and is discharged from the paper material discharge port 33 of the discharge cyclone 7 to the measuring unit 6.

  When a predetermined amount of paper material 2 is weighed in the weighing unit 6, the paper material 2 in the weighing unit 6 is put into a pulper tank 37 of the pulper device 9. The paper material 2 is disaggregated in the pulper tank 37 to become a pulp suspension 8. This pulp suspension 8 is stored in a storage tank 10, deinked by a deinking device 11, and then supplied to a head box 44 of the papermaking device 13.

  The pulp suspension 8 in the head box 44 is supplied onto the paper making wire 43 to make the wet paper 12 by making paper. The wet paper 12 obtained in this way is transferred from the papermaking wire 43 to the water absorption belt 47 and is absorbed and dehydrated by the water absorption belt 47.

  The wet paper 12 thus dewatered is transferred from the water absorption belt 47 to the first conveyance belt 51, and then the surface is smoothed by the calender roller 54, and is sandwiched between the first conveyance belt 51 and the second conveyance belt 53. Then, it is transported and dried by the heat of the drying drum 49 to form a belt-like sheet 61. The belt-shaped paper 61 is transported through the paper transport path 70, and is cut into a sheet 61 of a predetermined size by the cutter 60 at the finishing section 15, and then discharged from the paper discharge port 62.

  In a series of recycled paper manufacturing processes as described above, when the wet paper 12 is dried by the drying device 14, the moisture of the wet paper 12 evaporates and steam is generated. This steam is sent out to the steam supply duct 67 by the steam blower 68, flows through the steam supply duct 67, and is supplied to the space region of the finishing portion 15. As a result, the humidity in the space area of the finish 15 increases.

  In this way, by humidifying the atmosphere in the space area of the finish 15, the dried paper 61 absorbs moisture in the process of passing through the finish 15, and the paper 61 is finished with the humidity adjusted to an appropriate humidity one by one. It can be discharged from the section 15.

  For this reason, even when the recycled paper is manufactured in an office or the like in a limited space, the humidity control operation is performed in the apparatus to stabilize the paper quality. Therefore, the paper 61 discharged from the used paper recycling processor 1 is removed. It can be used immediately with a printing press, printer, etc., and troubles with the printing press, printer, etc. can be prevented in advance.

In addition, by positively supplying steam to the finish 15 by the steam blower 68, the space area of the finish 15 can be reliably humidified.
Further, the steam supply duct 67 faces the surface of the paper 61, and the paper 61 can reliably absorb moisture by supplying the steam blower 68 so as to positively blow the steam toward the paper surface.

  The drying device 14 adjusts the heating by the drying drum 49 on the assumption that the paper 61 absorbs moisture in the finishing section 15 and adjusts the moisture content of the paper 61 discharged from the drying device 14. For this reason, it is possible to prevent the moisture content of the paper 61 from becoming excessive in the finishing portion 15.

  The steam supply amount adjusting means 69 is composed of an atmospheric release valve, a three-way valve device, etc. whose opening degree can be adjusted, and can be operated manually or automatically. A part of the steam flowing through the steam supply duct 67 is discharged to the atmosphere. By adjusting the discharge amount, the supply amount of the steam supplied to the finishing section 15 can be adjusted.

  The steam supply amount adjusting means 69 adjusts the steam supply amount according to the thickness, quality, etc. of the paper 61 or according to the kind of additive chemical contained in the paper 61, and further to the space of the finish 15. The temperature or humidity of the atmosphere in the region or the heating temperature of the drying device 14 that dries the wet paper 12 is used as an index, depending on the seasonal environmental conditions such as the winter season when the atmosphere is dry and the summer season when the atmosphere is humid. Only the required amount of steam can be supplied.

  Further, by humidifying the space area of the finishing section 15, the generation of static electricity in the finishing section 15 can be suppressed, and the occurrence of trouble such as a paper jam can be suppressed in the paper conveyance path downstream of the drying drum 48.

Further, by using the steam generated in the drying device 14, it is not necessary to separately provide a steam generation source in the used paper recycling processing apparatus 1, and the cost can be reduced and the used paper recycling processing apparatus 1 can be reduced in size.
Embodiment 2
Next, a second embodiment will be described. As shown in FIGS. 3 and 4, the waste paper recycling apparatus 1 supplies steam generated in the pulper tank 37 of the pulper apparatus 9 that forms the steam generation source in the present embodiment to the space area of the finisher 15. A steam supply device 66 is provided as a humidifying means for humidifying the atmosphere.

  The steam supply device 66 includes a steam supply duct 67 that forms a steam supply path with one end connected above the pulper tank 37 and the other end connected to the space region of the finish 15, and steam generated in the pulper tank 37. And a steam blower 63 that sucks and feeds the steam into the steam supply duct 67. The steam blower 63 is provided in the ceiling portion of the pulper tank 37, and a steam supply amount adjusting means 69 is provided in the middle of the steam supply duct 67.

  Usually, in the recycled paper manufacturing process, the temperature in the pulper tank 37 is increased to about 40 ° C. due to frictional heat generated with the disaggregation operation. For this reason, the water | moisture content of the pulp suspension 8 in the pulper tank 37 evaporates, and a vapor | steam generate | occur | produces. The steam generated in the pulper tank 37 is sucked by the steam blower 63 and sent to the steam supply duct 67, flows through the steam supply duct 67, and is supplied to the space region of the finish 15. As a result, the humidity in the space area of the finish 15 increases.

  In this way, by humidifying the atmosphere in the space area of the finish 15, the dried paper 61 absorbs moisture in the process of passing through the finish 15, and the paper 61 is finished with the humidity adjusted to an appropriate humidity one by one. It can be discharged from the section 15. Other functions and effects are the same as in the previous embodiment, and a description thereof will be omitted.

  In the above embodiment, the steam supply device is connected to the drying device or the pulper tank. However, the steam supply device may be connected to both the drying device and the pulper tank.

DESCRIPTION OF SYMBOLS 1 Used paper recycling processing apparatus 2 Paper material 3 Storage part 6 Measurement part 7 Discharge cyclone 8 Pulp suspension 9 Pulper apparatus 12 Wet paper 13 Paper making apparatus 14 Drying apparatus 16 Paper material conveyance duct 18 Blower 28 Discharge port 29 Air supply discharge port 35 Air supply return duct 61 Paper 62 Paper discharge ports 63, 68 Steam blower 66 Steam supply device 67 Steam supply duct 69 Steam supply amount adjusting means 70 Paper transport path

Claims (8)

Pulp preparation unit that prepares recycled pulp from waste paper, paper making unit that produces belt-shaped wet paper, a drying unit that receives and dries belt-shaped wet paper, and a finish that receives dried belt-like paper and shapes it to the set specifications In a used paper recycling apparatus comprising:
A used paper recycling apparatus comprising humidifying means for humidifying an atmosphere in a space area of a finish.   2. The waste paper according to claim 1, wherein the humidifying means has a steam generating source for generating steam, a steam conveying path having one end communicating with the space area of the finish and the other end communicating with the steam generating source. Reproduction processing device.   The used paper recycling apparatus according to claim 2, wherein the steam generation source is at least one of a pulper device that disaggregates used paper in a pulp preparation unit and a drying device that dries wet paper in a drying unit.   The used paper recycling apparatus according to claim 2 or 3, wherein the humidifying means has a blower in a steam generation source or a steam transport path.   The drying unit dries the wet paper so that the moisture content of the paper that has passed through the drying unit is lower than the moisture content of the paper that has passed through the finish. The used paper recycling apparatus according to item.   The used paper recycling apparatus according to any one of claims 1 to 5, wherein the humidifying means includes a steam supply amount adjusting means for adjusting the amount of steam supplied to the space area of the finish.   The steam supply amount adjusting means adjusts the ratio between the supply amount of steam supplied to the finish through the steam transfer path and the exhaust amount of steam exhausted to the outside of the steam transfer path. The used paper recycling apparatus according to any one of the above.   The steam supply amount adjustment means adjusts the amount of steam supplied to the space area of the finish using the temperature or humidity of the atmosphere in the space area of the finish or the heating temperature of the drying device that dries the wet paper in the drying section as an index. The used paper recycling apparatus according to claim 6 or 7.

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