JP2011174210A - Waste paper treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waste paper treatment apparatus to take a sure action in the case of water leakage by detecting the water leakage. <P>SOLUTION: The waste paper treatment apparatus to prepare recycled paper by using waste paper as a recycling raw material includes a receiving pan 71 holding the waste paper treating apparatus as a whole and receiving water leaked from the waste paper treating apparatus, a drain outlet 72 formed on the receiving pan 71, and a water leakage sensor 73 to detect leaked water flowing outside through the drain outlet 72. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for producing paper from recycled pulp obtained by separating waste paper, and relates to a small waste paper processing apparatus that can be installed in an office or the like where waste paper is generated to recycle the paper.

2. Description of the Related Art Conventionally, in Japan, a technology and a social system for collecting used paper once used, for example, used newspapers and regenerating the used paper are established.
A papermaking method performed in a general papermaking factory includes a pulp process, a papermaking process, and a finishing process. When used paper is used as a raw material, a used paper pulp process is added.

In the pulp process, pulp is produced from wood chips through a process such as cooking, washing, bleaching, and selection by a chemical method, which is one of the pulping methods for extracting fibers from wood.
In the waste paper pulp process, the waste paper that is the raw material is dissolved in water, and metal, film, adhesive resin, printing ink (dye type, pigment type), which is a foreign matter other than paper fiber, using mechanical power and chemicals, The copy toner is separated and removed, and then bleached, dehydrated and dried to obtain waste paper pulp.

  In the paper making process, the product paper is processed through the wire part, press part, dryer part, calendar part, and coater part of the paper machine. In the wire part, the prepared (regenerated) pulp is placed on a paper making net (wire) and dehydrated to make paper, and in the press part, the moisture in the wet paper containing a large amount of moisture from the wire part is removed. In the dryer part, the paper is dried through a dryer heated with steam, in the calendar part, the paper surface is smoothed between the rolls, and in the coater part, the base paper is coated with paint.

  In the finishing process, in the super calender part, the micro unevenness of the paper surface coated by the coater part is smoothed to give gloss, and in the cutter and winder part, it is cut into a predetermined product size or wound on a roll.

  In Patent Document 1, as a used paper recycling method and apparatus, a process for separating recycled paper cut by a document cutting machine into recycled pulp, a process for storing recycled pulp, and a fiber sheet in which recycled pulp is filled in an injection device The structure which consists of the process of spraying and the papermaking of the recycled pulp sprayed on the fiber sheet is described.

JP 10-317290 A

  However, there are the following problems when the apparatus is downsized and installed in an office or the like. In other words, in a used paper processing apparatus that recycles used paper using a large amount of water, a measure for minimizing damage due to water leakage is indispensable. In addition, it is conceivable that water leaks in the apparatus due to an erroneous operation or the like during a cleaning operation during maintenance. Furthermore, since the used paper processing apparatus handles pulp transition, chemicals, and the like, there is a possibility that a solution exceeding the legal reference value of the discharged substance will flow out when water leaks.

  The present invention solves the above-described problems, and an object of the present invention is to provide a used paper processing apparatus capable of accurately performing treatment when water leakage occurs by detecting water leakage.

  In order to solve the above-mentioned problem, the used paper processing apparatus of the present invention is a used paper processing apparatus for preparing recycled paper using recycled paper as a raw material for recycling. The entire used paper processing apparatus is placed and catches water leakage from the used paper processing apparatus. It is characterized by comprising a receiving tray, a drain opening provided in the receiving tray, and a water leakage sensor for detecting the water leakage flowing outside through the drain opening.

  Further, in the used paper processing apparatus of the present invention, a water leakage absorbing member that is located upstream of the water leakage sensor and absorbs water leakage and through which water exceeding the absorbable capacity passes is provided, and the water leakage sensor leaks through the water leakage absorbing member. It is characterized by detecting.

In the used paper processing apparatus of the present invention, the water leakage absorbing member is arranged in a region corresponding to the entire bottom surface of the used paper processing apparatus.
In the used paper processing apparatus of the present invention, the tray has a bottom surface that is inclined downward toward the drain port.

Moreover, the used paper processing apparatus of the present invention is provided with a filtration device that is located upstream of the drainage port and filters water leakage.
In the used paper processing apparatus of the present invention, the filtration device is characterized by comprising a filter medium disposed in a region corresponding to the entire bottom surface of the used paper processing apparatus.

In the used paper processing apparatus of the present invention, the filtration device is characterized by comprising a filter medium having at least two layers of an upper layer made of a coarse member and a lower layer made of a fine member.
Further, the used paper processing apparatus of the present invention is characterized by having a solenoid valve that receives a water leakage detection output of the water leakage sensor and shuts off a water supply system that supplies water to the used paper processing apparatus.

In addition, the used paper processing apparatus of the present invention is characterized by having an alarm device that receives a water leak detection output of a water leak sensor and issues an alarm.
Further, the used paper processing apparatus of the present invention is characterized in that it has a main body cover that covers the entire used paper processing apparatus and that is disposed in a sealed manner with the tray.

  As described above, according to the present invention, even when water leakage occurs in the used paper processing apparatus, the water leakage can be drained from the drain outlet to a predetermined place (drainage groove) via the tray. In addition, by detecting the leaking water that flows out through the drain port with the leak sensor, it is possible to detect the leak at an early stage and take an appropriate measure.

  By detecting the water leakage that passes through the water leakage absorbing member with the water leakage sensor, it is possible to detect and detect the temporary and small amount of water leakage and the sudden large amount of water leakage. Can be delayed.

  That is, when detecting water leakage with the water leakage sensor, the water leakage absorbing member acts as a noise filter, and if the water leakage is a temporary and minute amount of water leakage, the water leakage absorbing member absorbs the water leakage so that the water leakage reaches the water leakage sensor. If there is a sudden and large amount of water leakage, water that exceeds the absorbable capacity of the water leakage absorbing member passes through the water leakage absorbing member and reaches the water leakage sensor. It is possible to detect and separate the water leakage.

  In addition, in the case of a continuous and small amount of water leakage, the detection of water leakage can be delayed until the capacity that can be absorbed by the water leakage absorbing member is exceeded. It is possible to continue driving safely.

  By providing a filtration device, it is possible to drain water that meets the legal standards for discharged substances.

Schematic diagram showing a used paper processing apparatus in an embodiment of the present invention Perspective view showing the entire used paper processing apparatus The waste paper processing apparatus is shown, (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view taken along line AA in (a). The perspective view which shows the whole used paper processing apparatus in other embodiment of this invention The waste paper processing apparatus is shown, (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view taken along line AA in (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the used paper processing apparatus is a unit that prepares (recycles) recycled paper from used paper 6 by integrally including a recycled pulp unit 1, a deinking pulp unit 2, a paper making unit 3, a finishing unit 4, and a wastewater treatment unit 5. In the lower part of the apparatus, there is a water receiving part 7 for placing the entire used paper processing apparatus, and a control part 8 for controlling each part.
(Recycled pulp part)
The recycled pulp unit 1 separates the used paper 6 to prepare (regenerate) recycled pulp. The recycled pulp unit 1 forms a raw material storage unit for storing the recycled raw material paper 6 in a fixed form, and a recycled raw material tank 11. A shredder tank 12 serving as a raw material storage unit for temporarily storing a cut piece of paper that has been cut into a predetermined size suitable for recycling by cutting waste paper 6, a fiber amount adjusting unit 13, a pulper 14, and a fiber concentration An adjustment unit 15 is provided.

  The fiber amount adjusting unit 13 is disposed below the standard paper tank 11 and the shredder tank 12, measures the weight of the used waste paper 6, and changes the set weight related to the measurement to change the used paper to the pulper 14. The amount of 6, that is, the fiber amount is adjusted.

  The pulper 14 disaggregates the used paper 6 into fibers, that is, recycled pulp, in a solvent such as clean water, white water, etc., and a solvent supply system that supplies the solvent from the waste water treatment unit 5 to the tank body into which the used paper 6 is put. 101 communicates.

  The pulper 14 communicates with the fiber concentration adjusting unit 15. The fiber concentration adjusting unit 15 supplies the recycled pulp-containing liquid to the deinked pulp unit 2 and the solvent from the waste water treatment unit 5 as the concentration adjusting solution. A concentration adjusting liquid supply system 103 is in communication.

In the pulper 14 and the fiber concentration adjusting unit 15, a solvent corresponding to the amount of paper of the recycled raw material, here water is added to the tank body, and the stirring blade is driven to rotate to disaggregate the fibers of the used paper 6 to prepare recycled pulp. (Regeneration), and the recycled pulp-containing liquid containing the recycled pulp is sent to the deinking pulp section 2 through the fiber concentration adjusting section 15.
(Deinking pulp section)
The deinking pulp unit 2 includes a storage tank 21, a pre-deinking dilution tank 22, and a deinking unit 23, and a transfer system 201 including a pipe, a pump, and the like between the storage tank 21 and the pre-deinking dilution tank 22. And a transfer system 202a including a pipe, a pump and the like and having a valve 202b is provided between the pre-deinking dilution tank 22 and the deinking unit 23, and the pre-deinking dilution tank 22 and a head box of the paper making unit 3 described later. A transfer system 202c having a valve 202d is provided between the pipes 31 and 31.

  When the valves 202b and 202d are switched, the recycled pulp-containing liquid in the pre-deinking dilution tank 22 flows to the deinking unit 23 through the transfer system 202a and directly flows to the head box 31 through the transfer system 202c. And can be switched.

  When the recycled pulp-containing liquid in the pre-deinking dilution tank 22 flows to the deinking unit 23 through the transfer system 202a, the storage tank 21 is in the middle of the transfer path for transferring the regenerated pulp from the pulper 14 to the deinking unit 23. The deinking unit supplies the regenerated pulp-containing liquid continuously to the downstream pre-deinking dilution tank 22 while storing the regenerated pulp-containing liquid sent from the fiber concentration adjusting unit 15 on the upstream side of the transfer path. The recycled pulp-containing liquid is continuously supplied to the papermaking unit 3 through the No. 23.

  Further, when the recycled pulp-containing liquid in the pre-deinking dilution tank 22 flows directly to the head box 31 through the transfer system 202c, the storage tank 21 transfers the recycled pulp from the pulper 14 to the head box 31 of the paper making unit 3. The regenerated pulp-containing liquid is continuously supplied to the downstream head box 31 while storing the regenerated pulp-containing liquid sent from the fiber concentration adjusting unit 15 on the upstream side of the transfer path.

The deinking unit 23 is called a floatator, and separates foreign matter such as ink and toner from the fiber. In the presence of a surfactant, the deinking unit 23 contains a recycled pulp-containing liquid containing particles of foreign matter such as ink and toner. While stirring with a stirring blade, fine bubbles are blown into the recycled pulp-containing liquid, and hydrophobic foreign particles are adhered to the surface of the bubbles of the surfactant to be floated and separated for deinking.
(Paper making)
The paper making unit 3 makes a deinked pulp and prepares (recycles) recycled paper, and includes a head box 31, a wire unit 32, a dehydrating unit 33, a press unit 34, and a dryer unit 35.

  The wire portion 32 has a mesh belt 323 stretched between rolls 321 and 322 on both sides, and the mesh belt 323 forms an endless track. The mesh belt 323 is uniformly ejected with a deinked pulp-containing liquid including deinked pulp from the head box 31, and drained to form a fiber layer.

  The dewatering unit 33 is composed of a pair of upper and lower water absorbing belts 332 made of felt stretched between a plurality of rollers 331, and transfers the paper 333 made from the mesh belt 323 to the water absorbing belt 332, and between the upper and lower water absorbing belts 332. Water is sandwiched between and dehydrated. The water absorbing belt 332 dehydrates between a pair of upper and lower dewatering rollers 334 provided on the traveling track.

The press unit 34 sandwiches the paper 333 made between the water-absorbing belts 332 and squeezes and dehydrates it through a pair of upper and lower dewatering rollers 341.
The dryer unit 35 sandwiches the paper 333 formed between a pair of upper and lower cloth conveyor belts 352 spanned between a plurality of rollers 351, and presses the plurality of drying rollers 353 to dry the paper 333 formed. It is.
(Finishing part)
The finishing section 4 has a calendar section 41 and a cutting section 42. The calendar section 41 passes the paper 333 made between a plurality of press rollers 411 to increase the flatness of the paper. The recycled paper 100 is completed by cutting into sizes.
(Wastewater treatment department)
The waste water treatment unit 5 includes tank bodies of a white water tank 51 and a waste water treatment unit 52. The white water tank 51 stores waste water containing recycled pulp flowing from the wire part 32 through the papermaking drainage system 105, and returns to each step again. Supply. The waste water treatment unit 52 treats the deinking waste liquid flowing from the deinking unit 23 through the deinking drainage system 106. The waste water treatment unit 52 passes through a filter to remove fibers, ink, and toner, and is neutralized by adding chemicals to the public. Treat to the quality of water that can be drained into sewage. The white water tank 51 communicates with a makeup water supply system 107 for supplying clean water as makeup water, and the makeup water supply system 107 is provided with an electromagnetic valve 108.
(Water receiving part)
As shown in FIGS. 2 and 3, the water receiver 7 detects a water tray 71 that receives water leaked from the used paper processing apparatus, a drain port 72 provided in the tray 71, and leaks that flow to the outside through the drain port 72. A water leakage sensor 73 is provided, a water leakage absorbing member 74 is disposed upstream of the water leakage sensor 73, and a filtration device 75 is disposed upstream of the drain port 72 and downstream of the water leakage absorbing member 74.

  The tray 71 covers the entire bottom portion of the used paper processing apparatus, and the drain outlet 72 communicates with a drainage system (not shown) such as sewage. A main body cover 76 is disposed on the tray 71 so as to cover the entire used paper processing apparatus, and a seal is provided between the tray 71 and the main body cover 76.

  In the present embodiment, the tray 71 has a flat bottom surface. However, as shown in FIGS. 4 and 5, the bottom surface of the tray 71 is inclined downward toward the drain port 72. It is also possible.

  As the water leakage sensor 73, a lead wire type sensor, an electrode type point sensor, or the like can be used. In this embodiment, a plurality of water leakage sensors 73 are arranged on the tray 71, but the number of water leakage sensors 73 is one. Is also possible. That is, since the lead wire sensor can reliably detect water leakage at any part of the lead wire, by arranging the lead wire sensor so as to surround the drain port 72, the water leakage can be detected at any position on the tray 71. Even if it flows into the drain port 72, it can be detected by the water leakage sensor 73, and a wide area can be monitored by the single water leakage sensor 73.

  The water leakage absorbing member 74 is made of sponge or the like, is located upstream of the water leakage sensor and absorbs water leakage, and water leakage exceeding the absorbable capacity passes through. The water leakage sensor 73 detects the water leakage that has passed through the water leakage absorbing member 74. Is detected. In the present embodiment, in consideration of certainty, the water leakage absorbing member 74 is arranged in a region corresponding to the entire bottom surface of the used paper processing apparatus, that is, in the entire region of the tray 71 to correspond to the total water leakage. However, it is also possible to dispose only in a region where water leakage is expected, and it is also possible to dispose only around the drain port 72.

  The filtering device 75 is made of a filter medium such as a net or sponge, is located downstream of the water leakage absorbing member 74 and filters the water leakage, and the filtered water flows into the drain port 72. In the present embodiment, the filter medium of the filtration device 75 has at least two layers of an upper layer made of a coarse member and a lower layer made of a fine member, and is arranged in multiple layers by combining nets, sponges, and the like. It is also possible to provide a coarse and fine layer in the sponge structure. Further, in the present embodiment, the filter medium of the filtration device 75 is used in the waste paper processing device so that it does not exceed the allowable capacity of the filtration device 75 when a large amount of pulp fibers flows out from the deinking section 23, for example. It arrange | positions to the area | region corresponding to the whole bottom face, ie, the whole area | region of the saucer 71, and is made to respond | correspond to all the water leaks. However, it can be arranged only around the drainage port 72.

The water leakage absorbing member 74 and the filtering device 75 can be mounted in a sliding manner, or can be mounted divided into a plurality of parts.
(Control part)
The control unit 8 controls the operation of the regenerated pulp unit 1, the deinking pulp unit 2, the paper making unit 3, the finishing unit 4, and the wastewater treatment unit 5. By closing the valve 108, the makeup water supply system 107, which is a water supply system for supplying water to the used paper processing apparatus, is shut off. Further, the control unit 8 includes an alarm device 81, and issues an alarm by the alarm device 81 in response to the water leak detection output of the water leak sensor 73.

  With the above configuration, when water leakage occurs in any part of the used paper processing apparatus, the water leakage absorbing member 74 absorbs the water leakage, and the water leakage exceeding the absorbable capacity of the water leakage absorbing member 74 passes through the water leakage absorbing member 74. Then, the filter device 75 is reached.

  For example, when water leakage including a large amount of pulp fiber or the like occurs from the deinking unit 23, the filter medium of the filtration device 75 prevents clogging by supplementing the pulp fiber or the like in the upper layer made of a coarse member. In addition, it is possible to reliably prevent the pulp fibers and the like from flowing out by supplementing the pulp fibers and the like that have passed through the upper layer in the lower layer composed of fine members, and drainage that satisfies the statutory standards relating to the discharged substances becomes possible.

  Even if water leakage occurs, the main body cover 76 covers the entire waste paper processing apparatus, and a seal is provided between the tray 71 and the main body cover 76, so that the water leakage does not overflow to the outside and is surely drained. It flows out of the mouth 72. Further, when the bottom surface of the tray 71 is inclined downward toward the drain port 72, quick drainage can be realized, and even if a small amount of water reaches the tray 71, the water leaks quickly. By reaching the water leakage sensor 73, the detection of water leakage is ensured.

  The filtered water that has passed through the filtering device 75 flows on the tray 71 of the water receiving portion 7 and drains from the drain port 72 to a predetermined place (drainage groove). By detecting the leakage of water flowing on the tray 71 and flowing out of the drain port 72 by the leakage sensor 73, it is possible to detect the leakage at an early stage and take an appropriate measure.

  For example, the control unit 8 that has received the water leak detection output of the water leak sensor 73 closes the electromagnetic valve 108 and shuts off the makeup water supply system 107 to prevent a major accident from occurring due to water leak. Furthermore, the control part 8 receives the water leak detection output of the water leak sensor 73, issues a warning by the warning device 81, and notifies the administrator of the abnormality.

  And by detecting the water leak which passes the water leak absorption member 74 with the water leak sensor 73, it is possible to isolate | separate and detect a temporary and very small amount of water leak and a large amount of water leaks. Is detected, the water leakage absorbing member 74 acts as a noise filter.

  That is, in the case of a temporary and very small amount of water leakage, the water leakage absorbing member 74 absorbs the water leakage, so that the water leakage does not reach the water leakage sensor 73, and stable operation is performed without unnecessarily stopping the waste paper processing apparatus. realizable. Further, in the case of a sudden and large amount of water leakage, the water leakage exceeding the absorbable capacity of the water leakage absorbing member 74 passes through the water leakage absorbing member 74 and reaches the water leakage sensor 73, so that the water leakage can be detected. Therefore, it is possible to detect and detect a temporary and very small amount of water leakage and a sudden large amount of water leakage.

  Furthermore, the water leakage absorbing member 74 can delay detection of a continuous and minute amount of water leakage. That is, when the water leakage is not disturbing the operation and is continuous and in a very small amount, the detection of the water leakage can be delayed until the capacity that can be absorbed by the water leakage absorbing member 74 is exceeded. The operation can be continued safely over a certain time within the range of the absorbable capacity.

DESCRIPTION OF SYMBOLS 1 Recycled pulp part 2 Deinking pulp part 3 Paper making part 4 Finishing part 5 Waste water treatment part 6 Waste paper 7 Water receiving part 8 Control part 11 Standard paper tank 12 Shredder tank 13 Fiber amount adjustment part 14 Pulper 15 Fiber density adjustment part 21 Storage tank 22 Deinking tank before deinking 23 Deinking section 31 Head box 32 Wire section 33 Dewatering section 34 Press section 35 Dryer section 41 Calendar section 42 Cut section 43 Surplus paper piece transport section 51 White water tank 52 Waste water treatment section 71 Receptacle 72 Drain port 73 Leakage Sensor 74 Water leakage absorbing member 75 Filtration device 76 Main body cover 81 Alarm device 100 Recycled paper 101 Solvent supply system 102 Transfer system 103 Concentration adjustment liquid supply system 104 Diluted water supply system 105 Papermaking drainage system 106 Deinking drainage system 107 Makeup water supply system 108 Solenoid valve 201 Transfer system 202a, 202c Transport system 202b, 202d Valve 321, 322 Roll 323 Mesh belt 331 Roller 332 Water absorbing belt 333 Paper 334 Dewatering roller 341 Roller 351 Roller 352 Conveying belt 353 Drying roller 354 Temperature sensor 411 Press roller

Claims (10)

  In a used paper processing device that prepares recycled paper using recycled paper as a recycled material, the entire used paper processing device is placed, a tray that catches water leaked from the used paper processing device, a drain port provided in the tray, and through the drain port to the outside A used paper processing apparatus comprising a water leakage sensor for detecting the water leakage flowing out.   A water leakage absorbing member that is located upstream of the water leakage sensor and absorbs water leakage and through which water exceeding the capacity that can be absorbed passes, and the water leakage sensor detects water leakage that passes through the water leakage absorbing member. The used paper processing apparatus of 1.   The used paper processing apparatus according to claim 1, wherein the water leakage absorbing member is disposed in a region corresponding to the entire bottom surface of the used paper processing apparatus.   The used paper processing apparatus according to claim 1, wherein a bottom surface of the tray is inclined downward toward the drain port.   The used paper processing apparatus according to claim 1, further comprising a filtration device that is located upstream of the drain port and filters water leakage.   6. The used paper processing device according to claim 5, wherein the filtering device is made of a filter medium disposed in a region corresponding to the entire bottom surface of the used paper processing device.   The used paper processing apparatus according to claim 5 or 6, wherein the filtration apparatus is made of a filter medium having at least two layers of an upper layer made of a coarse member and a lower layer made of a fine member.   The used paper processing apparatus according to claim 1, further comprising an electromagnetic valve that receives a water leakage detection output from the water leakage sensor and shuts off a water supply system that supplies water to the used paper processing apparatus.   The used paper processing apparatus according to claim 1, further comprising an alarm device that receives a water leak detection output of the water leak sensor and issues an alarm.   The used paper processing apparatus according to claim 1, further comprising a main body cover that covers the entire used paper processing apparatus and seals the used paper processing apparatus.

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