JP5653153B2 - Waste paper recycling processor - Google Patents

Description

  The present invention relates to a used paper recycling apparatus that can be installed in an office or the like where waste paper is generated to recycle the paper, and more particularly relates to a technique related to a maintenance water source.

2. Description of the Related Art Conventionally, a papermaking method for recycling used paper such as used newspaper in a general paper mill includes a used paper pulp process, a paper making process, and a finishing process.
In the waste paper pulp process, waste paper, which is the raw material in the pulper, is dissolved in water, and metal, film, adhesive resin, and printing ink (dye type, pigment type) that are foreign matters other than paper fibers using mechanical power and chemicals. ), Separating and removing copy toner, etc., bleaching, dehydrating and drying 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.

  By the way, a small paper machine is operated and stopped more frequently than a large paper machine. At the time of stoppage, fibers in the solution are precipitated in the machine parts and tanks such as a pulper, and moisture is evaporated. Situations where only fibers remain are likely to occur. Therefore, appropriate maintenance is necessary as appropriate.

  Even in a paper machine equipped with a mode for automatically washing after a series of operation stops, the automatic washing mode is not sufficient depending on the situation, and washing by manual control may be separately required.

  Patent document 1 sprays doctor shower water on a press roll of a press part of a paper machine, and a configuration in which a release agent is added to the doctor shower water by a metering pump, and the release agent is sprayed onto the press roll together with the doctor shower water. Have been described.

JP2009-235595A

  By the way, cleaning of water and chemicals by manual control is basically an operation performed in a state where the operation of the paper machine is stopped. The plurality of storage tanks provided in the papermaking machine are connected by pipes, and when cleaning water or chemicals by manual control, the cleaning wastewater flows from the upper storage tank to the lower storage tank.

  However, when the operation of the paper machine is stopped, the water level gauge and other sensors are not activated, and if the operator's eyes are not sufficiently monitored, the storage tank is filled with washing wastewater, and washing wastewater etc. There is a problem that it overflows from the storage tank and leaks outside the machine.

  The present invention solves the above-described problems, and detects waste liquid level in a storage tank of a paper machine during maintenance by manual control, and can prevent waste water from leaking out of the machine in advance. An object is to provide a processing apparatus.

In order to solve the above-mentioned problems, the used paper recycling apparatus of the present invention has a water supply pipe for supplying water from a water supply source and a processing unit provided for each processing process, and a used paper recycling processing system in a plurality of processing units. In a used paper recycling processing apparatus comprising a control unit configured to control the operation of each processing unit, a main valve device is provided in the water supply pipe, and a manually controlled cleaning water supply device that supplies cleaning water by manual control is downstream of the main valve device Branched from the water supply pipe on the side, a liquid level monitoring device is provided in at least one of the plurality of processing units, and the control unit stops normal operation of the used paper recycling processing system and is manually controlled by the operator And a main valve device control function unit for closing the main valve device when the liquid level monitoring device detects an abnormal liquid level during maintenance in which the cleaning operation is performed .

  In the used paper recycling processing apparatus of the present invention, the main valve device maintains a closed state when the main power supply for supplying power to the used paper recycling processing system is in a non-energized state, and an open state when the main power supply is in an energized state. Thus, when the liquid level monitoring device detects an abnormal liquid level, it is closed by the original valve device control function unit of the control device.

  In the used paper recycling processing apparatus of the present invention, the manually controlled cleaning water supply device has a cleaning valve device, and the control unit closes the cleaning valve device during operation of the used paper recycling processing system. It is characterized by providing.

  In the used paper recycling processing apparatus of the present invention, the manually controlled washing water supply device has a water flow detection device, and the control unit prohibits the operation of the used paper recycling processing system when the water flow detection device detects a water flow. It comprises a part.

In the used paper recycling apparatus of the present invention, the control unit includes an individual operation control function unit that arbitrarily operates each processing unit independently.
In the used paper recycling processing apparatus of the present invention, the control unit includes a cleaning operation control function unit that performs a cleaning operation of each processing unit set in advance as a maintenance operation.

  In the used paper recycling processing apparatus of the present invention, the plurality of processing units constituting the used paper recycling processing system include: a pulper unit that disaggregates recycled materials to prepare recycled pulp; a storage tank unit that stores recycled pulp; and recycled pulp A deinking section for deinking and preparing deinked pulp, a papermaking section for making wet paper from the deinked pulp, a whitewater tank section for storing white water discharged from the papermaking section, and a wastewater treatment tank section for treating wastewater It is characterized by being.

  As described above, according to the present invention, when the liquid level monitoring device detects an abnormal liquid level in the processing unit during maintenance in which the operator performs the cleaning operation by manual control, the original valve device control function unit of the control unit However, by closing the main valve device, the cleaning operation is stopped before the storage tank of the processing unit is filled with cleaning wastewater even when the operator's eyes are not fully monitored. And the like can be prevented from overflowing from the storage tank of the processing unit and leaking out of the machine.

  During maintenance, the main valve device is opened only when the main power supply is energized, allowing the operator to perform manual cleaning operations using the manually controlled cleaning water supply device. By setting the state to be the condition of the cleaning operation, the operation of the liquid level monitoring device can be ensured, and the monitoring of the processing unit by the liquid level monitoring device can be executed reliably.

  During operation of the used paper recycling system, the cleaning valve device control function of the control unit closes the cleaning valve device, so that the operator manually cleans the used paper using the manually controlled cleaning water supply device during the used paper recycling process. You can definitely ban working.

  By detecting the water flow with the water flow detection device, the control unit can recognize that the operator is performing a manual cleaning operation using the manually controlled cleaning water supply device, and the normal operation prohibition control function unit of the control unit Thus, the operation of the used paper recycling system during maintenance can be surely prohibited.

  At the time of maintenance, when performing manual cleaning operations using the manually controlled cleaning water supply device, the operator can manually control each processing unit, such as the pulper unit or papermaking unit, by the independent operation control function unit of the control unit. The cleaning effect can be enhanced by operating alone.

  The operator can perform the cleaning operation of each processing unit set in advance as a maintenance operation by starting the cleaning operation control function unit of the control unit after the cleaning operation performed using the manually controlled cleaning water supply device. The finish cleaning for each processing unit becomes possible.

The block diagram which shows the used paper reproduction | regeneration processing apparatus in embodiment of this invention The block diagram which shows the control part of the used paper reproduction | regeneration processing apparatus in the embodiment Schematic diagram showing the pulper unit of the used paper recycling apparatus in the embodiment Schematic diagram showing the paper making section of the used paper recycling apparatus in the same embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4, the used paper recycling processing apparatus has a plurality of processing units constituting a used paper recycling processing system. The processing unit includes a paper feeding unit 1, a pulper unit 9, a storage tank unit 10, a deinking unit. There are a section 11, a paper making section 13, a drying section 14, a finishing section 15, a white water tank section 100, and a wastewater treatment tank section 101. In addition, the used paper recycling apparatus includes a control unit 700 that controls the operation of each processing unit.

  The paper supply unit 1 supplies recycled paper 4 as a recycled raw material. The storage unit 3 stores paper pieces 2 obtained by chopping the used paper 4, the paper supply device 5 supplies the used paper 4 to the storage unit 3, and storage. A discharge cyclone 7 for discharging the paper piece 2 stored in the unit 3 to the measuring unit 6, a paper piece transfer duct 16 for transferring the paper piece 2 of the storage unit 3 to the discharge cyclone 7, and air for transfer to the paper piece transfer duct 16 And a blower device 18 that generates an air flow 17 that flows from the storage unit 3 toward the discharge cyclone 7.

  The pulper unit 9 separates the paper piece 2 and prepares recycled pulp. The pulper unit 9 has a pulper tank 37 and a stirring device 38 provided in the pulper tank 37, and disaggregates the paper piece 2 weighed in the weighing unit 6. Thus, a pulp suspension 8 containing regenerated pulp is produced.

The storage tank unit 10 stores the pulp suspension 8 obtained in the pulper unit 9 and has a stirring device 39 inside.
The deinking unit 11 prepares deinked pulp by deinking the pulp suspension 8 stored in the storage tank unit 10, and includes a deinking tank 40 having a meandering flow path, and a deinking tank. And an air diffuser (not shown) for discharging a large number of bubbles from the lower part of 40.

  The paper making unit 13 makes the wet paper 12 from the deinked pulp suspension 8, and includes a paper making wire 43 composed of a mesh belt wound around a plurality of rollers 42, and deinked pulp. A head box 44 for supplying the suspension 8 onto the papermaking wire 43 is provided.

  The dewatering unit 20 dehydrates the wet paper 12 and includes a felt water absorbing belt 47 wound around a plurality of rollers 46, and the wet paper 12 is transferred from the paper making wire 43 to the water absorbing belt 47. Absorbs and dehydrates the wet paper 12.

  The drying unit 14 dries the dehydrated wet paper 12, and winds a first steel conveyor belt 51 around a drying roller 49 and a plurality of rollers 50 each including a heating device 48, and a plurality of rollers 52. The second transport belt 53 made of resin is wound around the net, and the first transport belt 51 and the second transport belt 53 overlap on the outer peripheral surface of the drying roller 49 with the wet paper 12 interposed therebetween. The wet paper 12 is dried.

  The pair of pressing rollers 46 a and 50 a squeezes and dehydrates the wet paper 12 through the water absorption belt 47 and the first conveyance belt 51, and transfers the wet paper 12 from the water absorption belt 47 to the first conveyance belt 51.

  The finishing unit 15 performs a finishing process on the dry paper 61 obtained by drying the wet paper 12, and discharges the obtained recycled paper 62 to the paper receiving unit 63. The dry paper 61 is a predetermined size. A metal cutter 60 or the like for cutting is provided.

  As shown in FIG. 1, the waste water treatment tank unit 101 processes the deinking waste liquid flowing from the deinking unit 11 through the deinking drainage system 102, removes fibers, ink, and toner with a filter, and adds chemicals Thus, the water is neutralized and treated to the quality of water that can be discharged into the sewage pipe 103 of the public sewage.

  The white water tank unit 100 stores white water, which is wastewater containing recycled pulp flowing from the paper making unit 13 through the paper making drainage system 104, and returns the white water to various parts of the used paper recycling processing system through the white water return systems 105 and 106. .

  A water supply source, here, a water supply pipe 108 for supplying water from a water supply pipe 107 is connected to the pulper unit 9, and a main valve device 109 for emergency stop including an electromagnetic valve is provided in the water supply pipe 108. The main valve device 109 maintains a closed state when the main power supply that supplies power to the used paper recycling processing system is in a non-energized state, and opens when the main power source is in an energized state.

  A manually controlled wash water supply device 110 is provided on the downstream side of the main valve device 109 from the water supply pipe 108. The manually controlled cleaning water supply device 110 supplies cleaning water by manual control, and includes a cleaning valve device 111 made up of an electromagnetic valve, a water flow detection device 112 made up of a water flow meter, a manual open / close plug 113, and a shower head 114. They are provided sequentially from the upstream side to the downstream side. Further, the spot cleaning pipe 200 is branched from the water supply pipe 108 on the downstream side of the main valve device 109 and connected to the paper making unit 13.

  The storage tank unit 10, the deinking unit 11, the paper making unit 13, the white water tank unit 100, and the wastewater treatment tank unit 101 are provided with a liquid level monitoring device 115 including a liquid level gauge. The liquid level monitoring device 115 may be provided in at least one of the storage tank unit 10, the deinking unit 11, the paper making unit 13, the white water tank unit 100, and the wastewater treatment tank unit 101.

  As illustrated in FIG. 2, the control unit 700 includes the following functional units as functional circuits set in the CPU 710. That is, a pulper unit control function unit 711 that controls the operation of the pulper unit 9, a deinking unit control function unit 712 that controls the operation of the deinking unit 11, and a papermaking unit control function unit 713 that controls the operation of the papermaking unit 3. And a finishing control function unit 714 that controls the operation of the finishing unit 15, a wastewater treatment tank unit control function unit 715 that controls the operation of the wastewater treatment tank unit 101, and an operation process from the start of operation to the stop of operation. An automatic operation control function unit 716 that performs the operation, a main valve device control function unit 717 that closes the main valve device when the liquid level monitoring device 115 detects an abnormal liquid level, and a cleaning valve during operation of the used paper recycling system. A cleaning valve device control function unit 718 for closing the device 111, a normal operation prohibition control function unit 719 for prohibiting operation of the used paper recycling processing system when the water flow detection device 112 detects a water flow, and each processing The optionally provided with the single operation control function unit 720 of islanding operation, the cleaning operation control function unit 721 which performs as automatically a series of operations the cleaning operation of each processing unit that is set in advance as a maintenance operation.

The operation of the above configuration will be described below.
(Normal operation)
In normal operation in which used paper recycling processing is performed, the automatic operation control function 716 of the control unit 700 includes a recycled pulp unit control function unit 711, a deinking pulp unit control function unit 712, a paper making unit control function unit 713, a finishing unit control function unit 714, The wastewater treatment unit control function unit 715 is activated, and the used paper recycling processing system is operated by controlling the pulper unit 9, the deinking unit 11, the paper making unit 13, the finishing unit 15, and the wastewater treatment tank unit 101, respectively.

During normal operation of the used paper recycling process system, the cleaning valve device control function unit 718 of the control unit 700 closes the cleaning valve device 111, so that the operator can manually control the cleaning water supply device 110 during the used paper recycling process. It is possible to reliably prohibit the cleaning operation by manual control.
(maintenance)
Switching between normal operation and maintenance operation by key operation on the operation panel. The switching means between the normal operation and the maintenance operation can have another configuration. At the time of maintenance in which the normal operation of the used paper recycling processing system is stopped and the operator performs the cleaning operation by manual control, the operator operates the cleaning valve device control function unit 718 to open the cleaning valve device 111 by manual control. In addition, the manual opening and closing plug 113 is opened and the shower head 114 is used to perform the pulper unit 9, the storage tank unit 10, the deinking unit 11, the paper making unit 13, the drying unit 14, the finishing unit 15, the white water tank unit 100, and the waste water treatment. Each processing unit of the tank unit 101 is cleaned. During maintenance cleaning, the waste water treatment operation is always performed in the same manner as normal waste paper recycling.

  At this time, when the liquid level monitoring device 115 detects an abnormal liquid level in each processing unit, the main valve device control function unit 717 of the control unit 700 closes the main valve device 109, thereby monitoring the operator. Even if the eyes are not fully accessible, before the storage tank of each processing unit is filled with cleaning wastewater, the cleaning operation is stopped and the cleaning wastewater overflows from the storage tank of each processing unit. It is possible to prevent leakage.

  Since the main valve device 109 is opened only when the main power supply is energized, the operator performs the manual cleaning operation using the manually controlled cleaning water supply device 110 only when the main power supply is energized. Can be performed. In other words, by making the main power supply energized as a condition for the cleaning operation, the operation of the liquid level monitoring device 115 can be ensured, and the liquid level monitoring device 115 can reliably monitor the liquid level of each processing unit. .

  The control unit 700 detects that the water flow is detected by the water flow detection device 112 at the time of maintenance, thereby recognizing that the operator is performing a cleaning operation by manual control using the manually controlled cleaning water supply device 110. The normal operation prohibition control function unit 719 can reliably prohibit the operation of the used paper recycling processing system during maintenance.

  At the time of maintenance, the operator activates the individual operation control function unit 720 of the control unit by manual control and arbitrarily operates each processing unit, for example, the screw rotation of the pulper unit 9 and the rotation of the belt of the paper making unit 13 arbitrarily, The cleaning effect can be enhanced. However, in consideration of safety, it has a configuration that does not operate unless an operation switch (not shown) of each part is continuously pressed.

  After the cleaning operation performed using the manually controlled cleaning water supply apparatus 110, the operator activates the cleaning operation control function unit 721 of the control unit 700 by manual control, thereby cleaning each processing unit set in advance as a maintenance operation. The operation can be automatically performed as a series of operations, and finishing cleaning can be performed for each processing unit.

  The cleaning operation of each processing unit set in advance as a maintenance operation includes a paper feeding unit 1, a pulper unit 9, a storage tank unit 10, a deinking unit 11, a paper making unit 13, which are processing units constituting the used paper recycling processing system. Washing water or white water in the white water tank unit 100 is passed through the drying unit 14, finishing unit 15, white water tank unit 100, and waste water treatment tank unit 101, and is installed at predetermined locations such as the pulper unit 9 and the paper making unit 13. Cleaning is performed by spraying clean water or white water from a head (not shown) in a spot manner. By starting the cleaning operation control function unit 721 after the maintenance, finishing cleaning of each processing unit of the used paper recycling processing system becomes possible.

DESCRIPTION OF SYMBOLS 1 Paper feed part 2 Paper piece 3 Storage part 4 Waste paper 5 Paper feeder 6 Weighing part 7 Cyclone for discharge 8 Pulp suspension 9 Pulper part 10 Storage tank part 11 Deinking part 12 Wet paper 13 Paper making part 14 Drying part 15 Finishing part 16 Paper piece transport duct 17 Air flow 18 Air blower 37 Pulper tank 38 Stirrer 39 Stirrer 40 Deinking tank 42 Roller 43 Paper making wire 44 Head box 46 Roller 46a, 50a Roller 47 Water absorption belt 48 Heating device 49 Drying roller 50 Roller 51 First 1 Conveying belt 52 Roller 53 2nd Conveying belt 61 Dry paper 62 Recycled paper 63 Paper receiving part 60 Cutter 100 White water tank part 101 Waste water treatment tank part 102 Deinking drainage system 103 Sewage piping 104 Paper making drainage system 105, 106 White water return system 107 Water supply pipe 108 Water supply pipe 109 Original valve device DESCRIPTION OF SYMBOLS 110 Manual control washing water supply apparatus 111 Cleaning valve apparatus 112 Water flow detection apparatus 113 Manual opening-and-closing stopper 114 Shower head 115 Liquid level monitoring apparatus 200 Spot cleaning piping 700 Control part 710 CPU
711 Pulper unit control function unit 712 Deinking unit control function unit 713 Paper making unit control function unit 714 Finish control function unit 715 Waste water treatment tank unit control function unit 716 Automatic operation control function unit 717 Original valve device control function unit 718 Cleaning valve Device control function unit 719 Normal operation prohibition control function unit 720 Single operation control function unit 721 Cleaning operation control function unit

Claims (7)

Used paper recycling that has a water supply pipe that supplies water from a water supply source and a processing unit that is provided for each processing process, and that includes a processing unit that configures a used paper recycling processing system and that controls the operation of each processing unit. In the processing device,
A main valve device is provided in the water supply piping, and a manually controlled cleaning water supply device that supplies cleaning water manually is branched from the water supply piping on the downstream side of the main valve device, and at least one of the plurality of processing units is treated. A liquid level monitoring device is installed in the
The control unit is a main valve that closes the main valve device when the liquid level monitoring device detects an abnormal liquid level during maintenance in which the normal operation of the waste paper recycling system is stopped and the operator performs a cleaning operation by manual control. A used paper recycling apparatus comprising an apparatus control function unit.   The main valve device is kept closed when the main power supply that supplies power to the waste paper recycling system is not energized, and is opened when the main power is energized. The used paper recycling processing apparatus according to claim 1, wherein when the position is detected, the former valve device control function unit of the control device performs a closing operation.   The manually controlled cleaning water supply device includes a cleaning valve device, and the control unit includes a cleaning valve device control function unit that closes the cleaning valve device during operation of the used paper recycling processing system. 2. A used paper recycling apparatus according to 1.   The manually controlled cleaning water supply device includes a water flow detection device, and the control unit includes a normal operation prohibition control function unit that prohibits the operation of the used paper recycling processing system when the water flow detection device detects a water flow. Item 2. A used paper recycling apparatus according to item 1.   The used paper recycling processing apparatus according to claim 1, wherein the control unit includes a single operation control function unit that arbitrarily operates each processing unit.   The used paper recycling processing apparatus according to claim 1, wherein the control unit includes a cleaning operation control function unit that performs a cleaning operation of each processing unit set in advance as a maintenance operation.   The multiple processing units that make up the used paper recycling system are: a pulper unit that separates recycled materials to prepare recycled pulp; a storage tank unit that stores recycled pulp; and deinked pulp to prepare deinked pulp A deinking section, a papermaking section for making wet paper from deinked pulp, a whitewater tank section for storing white water discharged from the papermaking section, and a wastewater treatment tank section for treating wastewater. 2. A used paper recycling apparatus according to 1.

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