WO2017173982A1 - 废纸净化方法和系统 - Google Patents

废纸净化方法和系统 Download PDF

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Publication number
WO2017173982A1
WO2017173982A1 PCT/CN2017/079463 CN2017079463W WO2017173982A1 WO 2017173982 A1 WO2017173982 A1 WO 2017173982A1 CN 2017079463 W CN2017079463 W CN 2017079463W WO 2017173982 A1 WO2017173982 A1 WO 2017173982A1
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Prior art keywords
waste paper
dust removal
paper
dry
purification system
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Application number
PCT/CN2017/079463
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English (en)
French (fr)
Inventor
孙佳斌
孙行航
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北京金马伦科技发展有限公司
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Priority to MYPI2018703661A priority Critical patent/MY191653A/en
Publication of WO2017173982A1 publication Critical patent/WO2017173982A1/zh

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/066—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being pulp sheets
    • D21B1/068—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being pulp sheets by cutting actions
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/08—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/08—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags
    • D21B1/10—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags by cutting actions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the invention relates to the field of waste paper processing, and in particular to a waste paper purification method and system.
  • waste paper bags In the recycling process of waste paper bags, it is necessary to take effective measures to remove residues in waste paper bags, such as dust, granules, plastic film and other non-plant fiber impurities.
  • the existing waste paper processing system cannot meet the requirements of purification, and the impurities enter the slurry system along with the disintegration of waste paper, especially the fine powder ash adsorbed to the fiber surface, in the subsequent slurry purification and screening process. It is difficult to remove and affects the quality of paper products.
  • the present invention provides a novel waste paper purification method and system.
  • a waste paper purification method includes: performing a first dry dust removal process on the scattered waste paper while performing the bulk processing on the bundled waste paper; and breaking the scattered waste paper Waste paper fragments; and a second dry dust removal process on waste paper fragments.
  • the method further includes: performing a wet dust removal process on the waste paper pieces; and performing the first dry dust removal process and the second dry process by a bag dust removal process The dust generated by one or both of the dust removal processes is recovered.
  • the bulk wrapping process and the first dry dust removing process are performed by an action of continuously turning over.
  • the toothed knife, the drum and the central shaft equipped with the dispersing rod are used for the bulk processing and the first dry dust removal treatment.
  • the scattered waste paper is broken into waste paper pieces by a flying knife and a fixed knife in a paper bag crusher.
  • the scattered waste paper is broken into 50-100mm waste Paper fragments. Set the number of flying knives in the paper bag crusher based on the size of the waste paper pieces.
  • the second dry dust removing process is performed on the waste paper scrap by one or more of the lifting, shredding, shaking, and tapping motions.
  • a second dry dust removal process is performed in the dry scrubber using one or more of a trommel, a toothed knife, and a dispersing rod.
  • the waste paper scraps are subjected to a wet dust removing treatment by one or both of the agitation and the rinsing action.
  • a waste paper purification system includes: a bulk dust remover configured to perform a first dry dust removal on the scattered waste paper while performing bulk processing on the bundled waste paper
  • the paper bag crusher is configured to break the scattered waste paper into waste paper pieces; the dry dust remover is configured to perform a second dry dust removal process on the waste paper pieces.
  • a wet paper sheet washing machine configured to perform a wet dust removal process on waste paper pieces.
  • a baghouse duster is configured to recover dust generated by one or both of the bulk duster and the dry duster.
  • the loose-packing dust remover includes a trommel screen, a toothed knife mounted on an inner wall of the drum screen, and a center shaft equipped with a dispersing rod.
  • a screen hole of 10-25 mm diameter is arranged on the drum screen.
  • the paper bag crusher includes a flying knife roll and a flying knife mounted on the flying knife roll, and a fixed knife seat and a fixed knife mounted on the fixed knife seat.
  • the number of flying knives mounted on the flying knife roll depends on the size of the waste paper pieces.
  • the dry dust removing machine includes a trommel, a center shaft, a toothed blade mounted on the inner wall of the drum screen, and a toothed knife and a dispersing rod mounted on the surface of the center shaft.
  • a trommel a center shaft
  • a toothed blade mounted on the inner wall of the drum screen
  • a toothed knife and a dispersing rod mounted on the surface of the center shaft.
  • the center shaft surface is set with 3-10 sets of toothed knives and a dispersing rod.
  • a screen hole of 10-50 mm diameter is arranged on the drum screen.
  • the height of the toothed cutter mounted on the inner wall of the drum screen and the toothed cutter mounted on the center shaft surface is 200-400 mm.
  • the length of the breakout bar is 200- 400mm.
  • the waste paper purification method and system according to the embodiment of the present invention is more complete in dust removal than the conventional waste paper processing system, and the purification effect is greatly improved. At the same time, it is suitable for pretreatment before pulping of most waste paper bags. It is also suitable for partially high-density waste paper with strong applicability.
  • FIG. 1 is a flow chart showing the steps of a waste paper purification method according to an embodiment of the present invention
  • FIG. 2 is a flow chart showing the steps of a waste paper purification method according to another embodiment of the present invention.
  • FIG. 3 is a flow chart showing the steps of a waste paper purification method according to still another embodiment of the present invention.
  • FIG. 4 is a flow chart showing the steps of a waste paper purification method according to still another embodiment of the present invention.
  • FIG. 5 is a schematic block diagram of a waste paper purification system in accordance with one embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a waste paper purification system in accordance with another embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a waste paper purification system in accordance with still another embodiment of the present invention.
  • Figure 8 is a schematic view showing the assembly of a waste paper purification system according to an embodiment of the present invention.
  • FIG. 9 is a schematic illustration of an example of a waste paper processing system including a waste paper purification system in accordance with one embodiment of the present invention.
  • 1-waste cement bag 2-feed conveyor, 3-pack filter, 4-belt conveyor, 5-bag crusher, 6-chain conveyor, 7-dry dust collector, 8 - wet washing machine, 9-conveyor, 10-hydraulic pulper, 11-precipitation tank, 12-bag duster, 13-fan, 14-cement slag, 15-cement fine powder;
  • Fig. 10 is a schematic view showing a specific example of a conventional waste paper purifying system.
  • Figure 10 is a prior art waste paper processing system including a conveyor (the conveyor can be a belt conveyor or a chain plate machine), a bulk packer and a D-type pulper, and a hydraulic washer and a cylinder screen attached to the pulper system.
  • the conveyor can be a belt conveyor or a chain plate machine
  • a bulk packer and a D-type pulper mainly to deal with packaged waste boxes, office waste paper.
  • the packaged waste paper is cut into the packaged steel wire, and enters the bulk wrapping machine through the chain plate machine.
  • the raw material is tumbling and scattered in the drum, and some of the impurities are removed through the sieve hole of the drum, and the scattered waste paper is sent out through the spiral belt in the cylinder.
  • the conveyor will send the waste paper raw material to the D-type pulper for pulping, and further disintegrate the unbroken slurry through the hydraulic washer and the cylindrical sieve, and the impurities are not easily disintegrated.
  • the separation system is separated and the slurry is passed to a subsequent screening purification system.
  • the structure of the bulk equipment of the main equipment is simple, and only the surface of the waste paper or the entrained debris is separated and removed during the operation, and the impurities in the waste paper bag are difficult to be removed, usually waste.
  • the paper bag is transported to the bulk machine by the chain plate machine to disperse the big bag. This process can only remove the impurities on the surface, and it is difficult to remove the impurities wrapped in the waste paper bag, especially the powder such as cement and white carbon black. Paper-like paper bags, even if they are continuously tumbling in a loose-packing machine, cannot remove impurities or dust hidden in the corners of the bag.
  • the paper bag When entering the next process hydraulic pulper, the paper bag is broken with the hydraulic disintegration, and the impurities are also exposed to the water; further hydraulic disintegration makes the waste paper into fiber, and the specific surface area of the fiber It is far larger than waste paper, and its surface has a strong adsorption of hydroxyl groups, which adsorbs with each other and is difficult to remove in subsequent screening and purification.
  • the main drawback is that the paper is broken into pulp and then the impurities are removed. Subsequent equipment investment is large, and the required amount of water is large, and the energy consumption is high, which has extremely adverse effects on the clean production of the system.
  • the present invention proposes a waste paper purification method and system.
  • a waste paper cleaning method and system according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1-9.
  • the waste paper purification method includes: Step S10: performing a first dry dust removal process on the scattered waste paper while performing bulk processing on the bundled waste paper; Step S20: Dispersing The opened waste paper is broken into waste paper pieces; step S30: the second dry dust removal process is performed on the waste paper pieces.
  • Step S10 performing a first dry dust removal process on the scattered waste paper while performing bulk processing on the bundled waste paper
  • Step S20 Dispersing The opened waste paper is broken into waste paper pieces
  • step S30 the second dry dust removal process is performed on the waste paper pieces.
  • step S10 performing the first dry dust removal process on the scattered waste paper while performing the bulk processing on the bundled waste paper; and step S20: breaking the scattered waste paper into waste paper fragments; S30: Perform a second dry dust removal process on the waste paper pieces.
  • step S40 the waste paper scrap is subjected to a wet dust removal treatment.
  • step S10 performing the first dry dust removal process on the scattered waste paper while performing the bulk processing on the bundled waste paper; and step S20: breaking the scattered waste paper into waste paper fragments; S30: performing a second dry dust removal process on the waste paper pieces; and step S40: performing a wet dust removal process on the waste paper pieces.
  • step S50 one or two of the first dry dust removal treatment and the second dry dust removal treatment by the bag dust removal process. The dust generated by the person is recovered.
  • the two-stage dry dust removal allows the impurities or dust hidden in the pockets to be effectively removed.
  • step S10 performing the first dry dust removal process on the scattered waste paper while performing the bulk processing on the bundled waste paper
  • Step S20 breaking the scattered waste paper into waste paper pieces
  • Step S30 performing a second dry dust removal process on the waste paper pieces.
  • step S50 one or two of the first dry dust removal treatment and the second dry dust removal treatment by the bag dust removal process. The dust generated by the person is recovered. It can be seen that when the waste paper scraps are not treated by the wet washing machine, the impurities or dust hidden in the pockets can be effectively removed only by the two-stage dry dust removal and the bag dust removal treatment.
  • the bulk processing and the first dry dust removal processing are performed by an action of continuously flipping.
  • the toothed knife and the drum are used for the bulk processing and the first dry dust removal treatment.
  • the scattered waste paper is broken into waste paper pieces by a flying knife and a fixed knife in a paper bag crusher.
  • the scattered waste paper is broken into pieces of waste paper of 50-100 mm, and the number of flying knives in the paper bag crusher is set according to the size of the waste paper pieces.
  • the second dry dust removal process is performed on the waste paper pieces by one or more of a lift, a shred, a shake, and a tapping action.
  • a second dry dust removal process is performed in a dry scrubber using one or more of a trommel, a toothed knife, and a dispersing rod.
  • the waste paper shreds are subjected to the wet dust removal treatment by one or both of agitation and rinsing motions.
  • wet dust removal of waste paper fragments is carried out using one or both of water and chemical auxiliaries.
  • Fig. 5 is a schematic structural view of a waste paper purification system according to an embodiment of the present invention.
  • the waste paper purification system 10 includes a bulk dust remover 101, a paper bag crusher 102, and a dry dust remover 103.
  • the bulk duster 101 is configured to perform a first dry dust removal process on the scattered waste paper while performing the bulk processing on the bundled waste paper; the paper bag crusher The 102 is configured to break the scattered waste paper into waste paper pieces; the dry dust remover 103 is configured to perform a second dry dust removal process on the waste paper pieces.
  • the bag filter 101 differs from the existing bag machine in that the bag filter 101 includes a trommel screen and a sieve hole (the screen is provided with a sieve on the drum screen to ensure the dust removal effect as much as possible under the premise of the process.
  • a hole such as a 10-25 mm diameter mesh, a toothed knife mounted on the inner wall of the drum screen and a center shaft equipped with a diffusing rod.
  • the bundle of waste paper entering the drum screen is continuously turned over by the rotating drum to remove entrained impurities and ropes, and the apparatus drives the rotation of the drum by the rotation of the four idlers.
  • the paper bag crusher 102 removes the impurities and dust inside the paper bag (especially the four corners), and must break the waste bag, and cut the paper bag by using a flying knife fixed on the flying knife roller by screws and a fixed knife on the fixed knife seat. .
  • the device drives the rotation of the flying knife roll by the rotation of the pulley.
  • the number of flying blades mounted on the flying knife roll is set, for example, shredded into pieces of waste paper of 50-100 mm, and the flying knife roll can be When installing 2-8 flying knives, when rotating, the flying knives and the fixed knives fixed on the fixed knives are cut to break the paper bag.
  • the dry dust remover 103 includes a drum screen, a center shaft, a toothed knife mounted on the inner wall of the drum screen, and a toothed knife and a dispersing rod mounted on the surface of the center shaft.
  • the inner wall of the drum screen is equipped with 10-30 toothed knives; the center shaft surface is provided with 3-10 sets of toothed knives and a dispersing rod; the drum screen is provided with a sieve hole of 10-50 mm diameter; and the inner wall of the drum screen is installed
  • the height of the toothed knife and the toothed surface of the central shaft surface is 200-400 mm; the length of the breaking rod is 200-400 mm.
  • the waste paper that enters the drum screen is dropped by the rotating drum at the highest point, and the broken paper bag and the paper sheet are lifted, shredded, shaken and beaten by the toothed knife and the loosening rod installed on the central shaft. This completes the purpose of further removing impurities and dust.
  • the waste paper purification system 10 further includes a wet scrubber 104 configured to perform a wet dust removal process on the waste paper chips.
  • the wet scrubber 104 is driven by a chain gear to drive the platen roller and the fork roller to agitate and rinse the paper in the water, and finally remove the paper from the water through the chain hoist.
  • wet dust removal of waste paper fragments by one or both of agitation and rinsing operations The treatment further removes impurities which cannot be removed by the dry surface of the paper sheet, and at the same time, the waste paper fragments can be subjected to wet dust removal treatment by one or two kinds of water and chemical additives, and the impurities in the washing water are concentrated and removed.
  • the amount of replenished water and the amount of generated sewage is greatly reduced by the sheet washing machine.
  • the cleanliness of the paper sheet is improved to meet the use requirements of the waste paper pulp, and the applicability is improved.
  • FIG. 7 is a schematic view showing the structure of a waste paper purifying system according to still another embodiment of the present invention.
  • the waste paper purification system 10 further includes a baghouse duster 105 configured to recover dust generated by one or both of a bulk duster and a dry duster.
  • FIGS. 8-9 are schematic views showing the assembly of a waste paper purification system in accordance with one embodiment of the present invention.
  • Figure 8 is a schematic view showing the assembly of a waste paper purification system in accordance with one embodiment of the present invention.
  • 9 is a schematic illustration of an example of a waste paper processing system including a waste paper purification system in accordance with one embodiment of the present invention.
  • the waste paper bag contained in the recycled waste paper bag contains about 50% of impurities such as cement powder, and the conventional process is used. About 10-15% of the cement powder enters the hydraulic pulper along with the waste paper bag. As the specific surface area of the fiber after the disintegration increases, the amount of adsorbed cement powder also increases, which makes the subsequent purification difficulty increase, the process is complicated, and the energy consumption is complicated. increase.
  • the present invention is processed by the flow shown in Figure 9 below.
  • the main difference from the conventional process is that impurities are removed in the paper, rather than removing impurities in the slurry. It is much easier to remove impurities in the paper than to remove impurities in the slurry. , the device process is simpler.
  • the dust removal, crushing, dry and wet dust removal process is used to remove the cement powder before the dry dust removal, the ash content is less than 10%, and then the wet method is used to reduce the ash.
  • About 5% after the slurry is made by the hydraulic pulper, its subsequent purification system is greatly simplified, and it also has the effect of energy saving and water saving.
  • the waste paper bag enters the bulk dust remover 3 via the chain plate machine, and the waste paper bag is thrown up when the drum of the bulk wrapping machine is continuously rotated, and is scattered when dropped, and the impurity dust on the surface is simultaneously It is separated and removed through a 25mm sieve hole.
  • the scattered material is taken out by the spiral piece in the rotating drum; its daily processing capacity can meet 100-500 tons, and the drum rotation speed can be controlled at 5- 15 rpm; the material scattered by the belt conveyor is conveyed to the paper bag crusher 5, and the waste paper bag is broken into 50-100 mm paper or paper strip between the fixed knife and the flying knife, which is beneficial to the removal of impurities in the next process.
  • the paper sheet is fed into the dry dust remover 7 by the chain plate machine. Under the action of the rotating drum and the central shaft, the paper sheet is lifted, and the toothed knife and the scattering rod on the center shaft further separate the impurity dust on the paper sheet. And through a 10-50mm sieve hole, the clean paper is taken out by the spiral plate in the rotating drum.
  • a toothed knife is mounted on the inner wall of the device drum and the rotating central shaft, and the height is about 200-400 mm.
  • the paper bag is torn; when the paper sheet is rotated to the middle and rear portions of the drum, A shaft is installed on the shaft, the length is 200-400mm, the paper is lifted and tapped, and the rotation speed can be controlled at 20-100rpm.
  • the paper According to the actual dust removal situation, if the paper is still adsorbed with dust that is difficult to remove, it should be further removed by wet washing.
  • the paper can directly enter the paper washing machine 8. Since the paper is light, it will float on the water surface when immersed in water.
  • the wet paper sheet is agitated and re-washed by a plurality of rotating platens and forks on the device to further remove impurities on the surface of the paper sheet.
  • the rotation radius of the platen and the rack is 300-500 mm, and the rotation direction just pushes the paper sheet forward.
  • the rotation speed can be controlled at 10-60 rpm.
  • the cement powder reacts with water, for example, by adding an appropriate amount of dilute acid to carry out the neutralization reaction, and adjusting the pH to 6-8, so that the fine cement particles are separated from the paper into the water, and the heavier impurities quickly sink into the tank.
  • the paper sheet is replaced and washed in the process of advancement, and the clean paper sheet is taken out at the end by the net chain hoist to enter the next pulping process.
  • the middle-stage wastewater generated by washing the paper sheet is pumped to the sedimentation tank 11, and the impurity particles are precipitated faster, and the supernatant liquid can be separated in 30 minutes, and returned to the paper washing machine for reuse by overflow, and the precipitated impurities can be used for the plate frame.
  • the filter press dehydrates and becomes a solid waste that can be stored and transported; dust is generated in the process of dry dust removal, and is systematically removed by the bag filter 12 to purify the production environment.
  • the waste paper purification system can effectively remove impurities or dust hidden in the corner of the bag by continuously rolling in the bulk dust remover; and effectively removing dust by two-stage dry method.
  • the ground has improved the effectiveness of removing impurities; at the same time, by combining dry and wet dust removal, it can effectively remove impurities and dust with different characteristics, save the equipment of the slag removal system after pulping, and improve the quality of waste paper pulp. It has played a positive and effective role.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

一种废纸净化方法和系统。该废纸净化方法包括以下步骤：在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；将散开的废纸破碎成废纸碎片；以及对废纸碎片进行第二次干法除尘处理。该废纸净化系统在回收废纸袋碎浆前，采用干法除尘机（7）和湿法洗涤机（8）将废纸袋中的杂质和粉尘尽量采用干法去除，再利用专门的水洗设备湿法进一步去除，有效地提高了去除粉尘的有效性，同时，处理后废纸袋浆的灰分接近原废纸所含的灰分值，从而简化了废纸处理系统碎浆后的净化筛选流程。

Description

废纸净化方法和系统 技术领域
本发明涉及废纸工艺领域，尤其涉及一种废纸净化方法和系统。
背景技术
在废纸袋的回收利用过程中，需要采取有效措施去除废纸袋中的残留物，如粉灰、颗粒、塑料薄膜等非植物纤维的杂物。然而，现有的废纸处理系统不能满足净化的要求，杂质随着废纸的碎解进入浆料系统，尤其是颗粒细小的粉灰吸附到纤维表面，在后续的浆料净化和筛选过程中难以去除，影响造纸产品的质量。
发明内容
本发明提供了一种新颖的废纸净化方法和系统。
根据本发明实施例的废纸净化方法，包括：在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；将散开的废纸破碎成废纸碎片；以及对废纸碎片进行第二次干法除尘处理。
在根据本发明实施例的废纸净化方法中，还包括：对所述废纸碎片进行湿法除尘处理；以及通过布袋除尘处理对所述第一次干法除尘处理和所述第二次干法除尘处理中的一者或二者产生的粉尘进行回收。
在根据本发明实施例的废纸净化方法中，通过不断翻转的动作进行所述散包处理和所述第一次干法除尘处理。在散包除尘机中利用齿形刀、滚筒和配置有打散棒的中轴进行散包处理和第一次干法除尘处理。
在根据本发明实施例的废纸净化方法中，在纸袋破碎机中利用飞刀和定刀将散开的废纸破碎成废纸碎片。散开的废纸被破碎成50-100mm的废 纸碎片。根据废纸碎片的尺寸，设置纸袋破碎机中的飞刀的数量。
在根据本发明实施例的废纸净化方法中，通过扬翻、撕碎、抖动、以及拍打动作中的一者或多者，对废纸碎片进行第二次干法除尘处理。在干法除尘机中利用滚筒筛、齿形刀、和打散棒中的一者或多者进行第二次干法除尘处理。
在根据本发明实施例的废纸净化方法中，通过搅动和翻洗动作中的一者或二者来对废纸碎片进行湿法除尘处理。利用水和化学助剂的一种或两种对废纸碎片进行湿法除尘处理。
根据本发明实施例的废纸净化系统，包括：散包除尘机，被构造用于在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；纸袋破碎机，被构造用于将散开的废纸破碎成废纸碎片；干法除尘机，被构造用于对废纸碎片进行第二次干法除尘处理。
在根据本发明实施例的废纸净化系统中，还包括：湿法的纸片洗涤机，被构造用于对废纸碎片进行湿法除尘处理。布袋除尘机，被构造用于对所述散包除尘机和所述干法除尘机中的一者或二者产生的粉尘进行回收。
在根据本发明实施例的废纸净化系统中，所述散包除尘机包括滚筒筛、安装在所述滚筒筛内壁的齿形刀和配置有打散棒的中轴。滚筒筛上设置有10-25mm直径的筛孔。
在根据本发明实施例的废纸净化系统中，纸袋破碎机包括飞刀辊和安装在飞刀辊上的飞刀、以及定刀座和安装在定刀座上的定刀。安装在飞刀辊上的飞刀的数量取决于废纸碎片的尺寸。
在根据本发明实施例的废纸净化系统中，干法除尘机包括滚筒筛、中轴、安装在滚筒筛内壁的齿形刀、以及安装在中轴表面的齿形刀和打散棒。滚筒筛内壁安装有10-30把齿形刀。中轴表面镶有3-10套齿形刀和打散棒。滚筒筛上设置有10-50mm直径的筛孔。滚筒筛内壁安装的齿形刀和中轴表面安装的齿形刀的高度为200-400mm。打散棒的长度为200- 400mm。
根据本发明实施例的废纸净化方法和系统相对于传统的废纸处理系统而言，除尘充分完全，净化效果大幅度提高，同时，适应于不同大多数废纸袋的碎浆前的预处理，也适用于部分强度较高的废纸，适用性较强。
附图说明
本申请的下列附图在此作为本申请的一部分用于理解本申请。附图中示出的实施方式及其描述用来解释本发明的原理。在附图中：
图1是根据本发明的一个实施例的废纸净化方法的步骤流程图；
图2是根据本发明的另一实施例的废纸净化方法的步骤流程图；
图3是根据本发明的再一实施例的废纸净化方法的步骤流程图；
图4是根据本发明的又一实施例的废纸净化方法的步骤流程图；
图5是根据本发明的一个实施例的废纸净化系统的示意框图；
图6是根据本发明的另一实施例的废纸净化系统的示意框图；
图7是根据本发明的再一实施例的废纸净化系统的示意框图；
图8是根据本发明的一个实施例的废纸净化系统的装配示意图；
图9是包括根据本发明的一个实施例的废纸净化系统的废纸处理系统的示例示意图；
其中，1-废水泥袋，2-上料输送机，3-散包除尘机，4-皮带输送机，5-废袋破碎机，6-链板输送机，7-干法除尘机，8-湿法洗涤机，9-输送机，10-水力碎浆机，11-沉淀槽，12-布袋除尘机，13-风机，14-水泥渣，15-水泥细粉；
图10是现有的废纸净化系统的具体实例示意图。
具体实施方式
下面将详细描述本发明的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本发明的全面理解。但 是，对于本领域技术人员来说很明显的是，本发明可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本发明的示例来提供对本发明的更好的理解。本发明决不限于下面所提出的任何具体配置，而是在不脱离本发明的精神的前提下覆盖了元素和部件的任何修改、替换和改进。在附图和下面的描述中，没有示出公知的结构和技术，以便避免对本发明造成不必要的模糊。
图10是现有技术的废纸处理系统，包括输送机(输送机可以为皮带机或链板机)、散包机和D型碎浆机以及碎浆机系统附属的水力清洗机和圆筒筛等，主要是处理打包的废旧包装箱、办公废纸。打包的废纸经剪断打包钢丝，经链板机进入散包机，在滚筒中将原料翻滚撞击散开，其中的部分杂质通过滚筒的筛孔被排除，散开的废纸经筒内螺旋带送出滚筒到下一条输送机，输送机将废纸原料送至D型碎浆机进行碎浆，并经过水力清洗机和圆筒筛对未碎解浆料进一步碎解，并与不易碎解的杂质分离排除系统，浆料进入后续的筛选净化系统。
然而，现有技术由于处理工艺简单，主要设备散包机的结构简单，运行过程中只对废纸表面或夹带的杂物进行分离去除，对废纸袋内的杂质很难去除干净，通常是废纸包经链板机输送到散包机，将大包进行分散，这一过程只能去除表面的杂质，对于包裹在废纸袋中的杂质很难去除，尤其是包装水泥、白炭黑等粉末类的纸袋，在散包机中即使连续不断地翻滚，也不能去除藏在袋角中的杂质或粉尘。在进入下一道工序水力碎浆机时，随着水力碎解作用的产生，使纸袋破碎，其中的杂质也随之暴露在水中；经进一步水力碎解使废纸成为纤维，而纤维的比表面积远远大于废纸，其表面有较强吸附作用的羟基，与细小的杂质颗粒相互吸附，在后续的筛选净化中很难去除，主要缺陷是将纸片碎解成浆后再去除杂质，其后续所需设备投资较大，而且所需的水量较大，能耗高，给系统的清洁生产带来极其不利的影响。
为了解决现有技术中的技术缺陷，本发明提出了一种废纸净化方法与 系统。为了更好地理解本发明，下面结合图1-9对根据本发明实施例的废纸净化方法和系统进行详细描述。
图1是根据本发明实施例的废纸净化方法的步骤流程图。如图1所示，废纸净化方法包括：步骤S10：在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；步骤S20：将散开的废纸破碎成废纸碎片；步骤S30：对废纸碎片进行第二次干法除尘处理。由此，通过散包处理操作以及两段式的干法除尘处理操作，极大地提高了去除杂质的有效性。
图2是根据本发明另一实施例的废纸净化方法的步骤流程图，其中，步骤S10-步骤S30均为图1所示的流程步骤。即步骤S10：在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；步骤S20：将散开的废纸破碎成废纸碎片；步骤S30：对废纸碎片进行第二次干法除尘处理。图2所示的实施例与图1所示的实施例之间的不同在于，步骤S40：对废纸碎片进行湿法除尘处理。由此，通过干法与湿法的合理组合，使纸片的洁净度大大提高。
图3是根据本发明再一实施例的废纸净化方法的步骤流程图，其中，步骤S10-步骤S40均为图2所示的流程步骤。即步骤S10：在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；步骤S20：将散开的废纸破碎成废纸碎片；步骤S30：对废纸碎片进行第二次干法除尘处理；步骤S40：对废纸碎片进行湿法除尘处理。图3所示的实施例与图1所示的实施例之间的不同在于，步骤S50：通过布袋除尘处理对第一次干法除尘处理和第二次干法除尘处理中的一者或二者产生的粉尘进行回收。由此，通过两段式干法除尘使得藏在袋角中的杂质或粉尘可以得到有效的去除。
图4是根据本发明又一实施例的废纸净化方法的步骤流程图，其中，步骤S10-步骤S40均为图1所示的流程步骤。即步骤S10：在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；步 骤S20：将散开的废纸破碎成废纸碎片；步骤S30：对废纸碎片进行第二次干法除尘处理。图4所示的实施例与图1所示的实施例之间的不同在于，步骤S50：通过布袋除尘处理对第一次干法除尘处理和第二次干法除尘处理中的一者或二者产生的粉尘进行回收。由此可知，在无需湿法洗涤机对废纸碎片进行处理时，仅通过两段式干法除尘以及布袋除尘处理，可以使得藏在袋角中的杂质或粉尘可以得到有效的去除。
根据本发明的一个实施例，通过不断翻转的动作进行散包处理和第一次干法除尘处理。在散包除尘机中利用齿形刀和滚筒进行散包处理和第一次干法除尘处理。由此，通过散包除尘机中连续不断地翻滚，能有效地去除藏在袋角中的杂质或粉尘。
根据本发明的一个实施例，在纸袋破碎机中利用飞刀和定刀将散开的废纸破碎成废纸碎片。例如，散开的废纸被破碎成50-100mm的废纸碎片，并且，根据废纸碎片的尺寸，设置纸袋破碎机中的飞刀的数量。由此，提高了纸袋破碎的规格性与充分性。
根据本发明的一个实施例，通过扬翻、撕碎、抖动、以及拍打动作中的一者或多者，对废纸碎片进行第二次干法除尘处理。例如，在干法除尘机中利用滚筒筛、齿形刀、和打散棒中的一者或多者进行第二次干法除尘处理。由此，通过两段式干法除尘，提高了去除杂质的有效性。
根据本发明的一个实施例，通过搅动和翻洗动作中的一者或二者来对废纸碎片进行所述湿法除尘处理。例如，利用水和化学助剂的一种或两种对废纸碎片进行湿法除尘处理。由此，提高纸片的洁净度，以满足废纸浆的使用要求，具有适用性。
图5是根据本发明实施例的废纸净化系统的结构示意图。如图5所示，废纸净化系统10包括：散包除尘机101、纸袋破碎机102以及干法除尘机103。
在一个实施例中，散包除尘机101被构造用于对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；纸袋破碎机 102被构造用于将散开的废纸破碎成废纸碎片；干法除尘机103被构造用于对废纸碎片进行第二次干法除尘处理。
具体地，散包除尘机101与现有的散包机不同之处在于：散包除尘机101包括滚筒筛、筛孔(滚筒筛上设置有在工艺允许的前提下，尽可能提高除尘效果的筛孔，例如10-25mm直径的筛孔)，安装在滚筒筛内壁的齿形刀和配置有打散棒的中轴。进入滚筒筛的废纸捆被旋转的滚筒不断翻转，能去除夹带的杂质和绳条，并且，该设备通过四个托轮的旋转驱动滚筒的转动。
纸袋破碎机102为去除纸袋内部(尤其四角)的杂质和粉尘，必须将废袋进行破碎，利用通过螺丝固定安装在飞刀辊上的飞刀、和定刀座上的定刀将纸袋剪碎。该设备通过皮带轮的旋转驱动飞刀辊的旋转，根据纸片尺寸的大小，设置安装在飞刀辊上飞刀的数量，例如，撕碎成50-100mm的废纸碎片，飞刀辊上可安装2-8把飞刀，旋转时，飞刀与固定在定刀座上的定刀产生剪切，从而将纸袋破碎。
干法除尘机103包括滚筒筛、中轴、安装在滚筒筛内壁的齿形刀、以及安装在中轴表面的齿形刀和打散棒。例如，滚筒筛内壁安装有10-30把齿形刀；中轴表面镶有3-10套齿形刀和打散棒；滚筒筛上设置有10-50mm直径的筛孔；滚筒筛内壁安装的齿形刀和所述中轴表面安装的齿形刀的高度为200-400mm；打散棒的长度为200-400mm。进入滚筒筛的废纸片被旋转的滚筒在最高点后落下，再由中轴上安装的齿形刀和打散棒对破碎的纸袋和纸片进行扬翻、撕碎、抖动和拍打，由此完成进一步去除杂质和粉尘的目的。
图6是根据本发明另一实施例的废纸净化系统的结构示意图。如图6所示，废纸净化系统10还包括：湿法洗涤机104被构造用于对废纸碎片进行湿法除尘处理。湿法洗涤机104通过链条齿轮传动，带动压板辊和拨叉辊在水中将纸片搅动和翻洗，最后通过网链提升机将纸片从水中捞出。具体地，通过搅动、翻洗动作中的一者或二者来对废纸碎片进行湿法除尘 处理，进一步去除纸片表面干法无法去除的杂质，同时，可利用水和化学助剂的一种或两种对废纸碎片进行湿法除尘处理，洗涤水中的杂质沉淀浓缩后排除，由此通过纸片洗涤机使得补充水量和产生污水量大大减少。并且，提高了纸片的洁净度，以满足废纸浆的使用要求，具有适用性。
图7是根据本发明再一实施例的废纸净化系统的结构示意图。如图7所示，废纸净化系统10还包括：布袋除尘机105被构造用于对散包除尘机和干法除尘机中的一者或二者产生的粉尘进行回收。
为了更好地理解本发明提出的废纸净化系统，结合图8-9对废纸净化系统进行详细说明。图8是根据本发明一个实施例的废纸净化系统的装配示意图。图9是包括根据本发明一个实施例的废纸净化系统的废纸处理系统的示例示意图。
结合图8-图9可以看出，以水泥包装用废纸袋纸为例，针对其所含的杂质特点，回收的废纸袋中含水泥粉等杂质含量50％左右，采用常规流程时，约有10-15％的水泥粉随废纸袋进入水力碎浆机，由于碎解后的纤维比表面积增大，吸附水泥粉的量也增加，使后续的净化难度增加，工序复杂，能耗增加。
本发明采用如下图9所示的流程进行处理，与常规的流程主要差别在于在纸片中去除杂质，而不是在浆中去除杂质，纸片中去除杂质比在浆中去除杂质要容易得多，在设备流程上更简单。在进入水力碎浆机前，采用散包除尘、破碎、干湿法除尘的工序，使水泥粉在干法除尘前尽量被去除，灰分达到10％以下，再经过湿法洗涤，使灰分降到5％左右，经水力碎浆机成浆后，其后续的净化系统大大简化，也起到了节能、节水的效果。
具体地，废纸袋包(捆)经链板机进入散包除尘机3，在散包机的滚筒不断转动下，废纸袋包被抛起，落下时被打散，表面夹杂的杂质粉尘同时被分离出来，通过25mm的筛孔去除，散开的物料通过旋转滚筒中的螺旋片带出；其日处理能力能满足100-500吨，滚筒转速可控制在5- 15rpm；通过皮带机散开的物料被输送到纸袋破碎机5，废纸袋在定刀和飞刀之间被破碎成50-100mm的纸片或纸条，有利于下道工序杂质的去除。
纸片通过链板机送入干法除尘机7，在旋转的滚筒和中轴的作用下，纸片被扬翻，中轴上的齿形刀和打散棒将纸片上的杂质粉尘进一步分离，并通过10-50mm的筛孔排除，干净的纸片通过旋转滚筒中的螺旋板带出。此设备滚筒内壁和转动的中轴上安装有齿形刀，高度约200-400mm，在同向或反向转动时，将纸袋撕开；当纸片被旋转到滚筒的中后部时，中轴上安装了打散棒，长度200-400mm，将纸片扬翻、拍打，转速可控制在20-100rpm。
根据实际的除尘情况，若纸片上仍然吸附有难以去除的粉尘，就要采取湿法洗涤进一步去除，纸片可直接进入纸片洗涤机8，由于纸片较轻，浸入水中会漂浮在水面，通过设备上的若干个旋转的压板和拨叉将湿纸片搅动、翻洗，进一步去除纸片表面的杂质，压板和齿条旋转半径在300-500mm，旋转方向恰好能推动纸片向前运行，旋转速度可控制在10-60rpm。在水中水泥粉与水产生化学反应，例如加入适量的稀酸进行中和反应，调整PH值达到6-8，使细小的水泥颗粒脱离纸片溶入水中，较重的杂质很快沉到槽底并排除，纸片在前进的过程中进行置换洗涤，干净的纸片在末端通过网链提升机捞出，进入下一道碎浆工序。
洗涤纸片产生的中段废水，泵送至沉淀槽11，杂质颗粒沉淀较快，在30分钟内可分离出上清液，通过溢流回到纸片洗涤机回用，沉淀的杂质可用板框压滤机脱水，变成可储存运输的固废物；在干法除尘的过程中产生粉尘，通过布袋除尘机12系统地去除，使生产环境得到净化。
综上所述，根据本发明实施例的废纸净化系统，通过散包除尘机中连续不断地翻滚，能有效地去除藏在袋角中的杂质或粉尘；通过两段式干法除尘，有效地提高了去除杂质的有效性；同时，通过灵活组合干、湿法除尘，有效地去除不同的特性的杂质和粉尘，对节省碎浆后除渣系统的设备、提高废纸浆料的品质起到了积极有效的作用。
以上已经参考本发明的具体实施例来描述了本发明，但是本领域技术人员均了解，可以对这些具体实施例进行各种修改、组合和变更，而不会脱离由所附权利要求或其等同物限定的本发明的精神和范围。此外，附图中的任何信号箭头应当被认为仅是示例性的，而不是限制性的，除非另有具体指示。当术语被预见为使分离或组合的能力不清楚时，组件或者步骤的组合也将被认为是已经记载了。

Claims (25)

  1. 一种废纸净化方法，包括：
    在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；
    将所述散开的废纸破碎成废纸碎片；以及
    对所述废纸碎片进行第二次干法除尘处理。
  2. 如权利要求1所述的废纸净化方法，还包括：
    对所述废纸碎片进行湿法除尘处理。
  3. 如权利要求1所述的废纸净化方法，还包括：
    通过布袋除尘处理对所述第一次干法除尘处理和所述第二次干法除尘处理中的一者或二者产生的粉尘进行回收。
  4. 如权利要求1所述的废纸净化方法，其中，通过不断翻转的动作进行所述散包处理和所述第一次干法除尘处理。
  5. 如权利要求1所述的废纸净化方法，其中，在散包除尘机中利用齿形刀、滚筒和配置有打散棒的中轴进行所述散包处理和所述第一次干法除尘处理。
  6. 如权利要求1所述的废纸净化方法，其中，在纸袋破碎机中利用飞刀和定刀将所述散开的废纸破碎成所述废纸碎片。
  7. 如权利要求6所述的废纸净化方法，其中，所述散开的废纸被破碎成50-100mm的废纸碎片。
  8. 如权利要求6或7所述的废纸净化方法，其中，根据所述废纸碎片的尺寸，设置所述纸袋破碎机中的所述飞刀的数量。
  9. 如权利要求1所述的废纸净化方法，其中，通过扬翻、撕碎、抖动、以及拍打动作中的一者或多者，对所述废纸碎片进行所述第二次干法除尘处理。
  10. 如权利要求9所述的废纸净化方法，其中，在干法除尘机中利用 滚筒筛、齿形刀、和打散棒中的一者或多者进行所述第二次干法除尘处理。
  11. 如权利要求2所述的废纸净化方法，其中，通过搅动和翻洗动作中的一者或二者来对所述废纸碎片进行所述湿法除尘处理。
  12. 如权利要求2所述的废纸净化方法，其中，利用水和化学助剂中的一种或两种对所述废纸碎片进行所述湿法除尘处理。
  13. 一种废纸净化系统，包括：
    散包除尘机，被构造用于在对打包成捆的废纸进行散包处理的同时，对散开的废纸进行第一次干法除尘处理；
    纸袋破碎机，被构造用于将所述散开的废纸破碎成废纸碎片；
    干法除尘机，被构造用于对所述废纸碎片进行第二次干法除尘处理。
  14. 如权利要求13所述的废纸净化系统，还包括：
    湿法洗涤机，被构造用于对所述废纸碎片进行湿法除尘处理。
  15. 如权利要求13所述的废纸净化系统，还包括：
    布袋除尘机，被构造用于对所述散包除尘机和所述干法除尘机中的一者或二者产生的粉尘进行回收。
  16. 如权利要求13所述的废纸净化系统，其中，所述散包除尘机包括滚筒筛、安装在所述滚筒筛内壁的齿形刀和配置有打散棒的中轴。
  17. 如权利要求16所述的废纸净化系统，其中，所述滚筒筛上设置有10-25mm直径的筛孔。
  18. 如权利要求13所述的废纸净化系统，其中，所述纸袋破碎机包括飞刀辊和安装在所述飞刀辊上的飞刀、以及定刀座和安装在所述定刀座上的定刀。
  19. 如权利要求18所述的废纸净化系统，其中，安装在所述飞刀辊上的飞刀的数量取决于所述废纸碎片的尺寸。
  20. 如权利要求13所述的废纸净化系统，其中，所述干法除尘机包括滚筒筛、中轴、安装在所述滚筒筛内壁的齿形刀、以及安装在所述中轴表 面的齿形刀和打散棒。
  21. 根据权利要求20所述的废纸净化系统，其中，所述滚筒筛内壁安装有10-30把齿形刀。
  22. 根据权利要求20所述的废纸净化系统，其中，所述中轴表面镶有3-10套齿形刀和打散棒。
  23. 根据权利要求20所述的废纸净化系统，其中，所述滚筒筛上设置有10-50mm直径的筛孔。
  24. 根据权利要求21或22所述的废纸净化系统，其中，所述滚筒筛内壁安装的齿形刀和所述中轴表面安装的齿形刀的高度为200-400mm。
  25. 根据权利要求22所述的废纸净化系统，其中，所述打散棒的长度为200-400mm。
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