WO2017210975A1 - 监测制浆造纸系统中胶粘物分布情况的方法 - Google Patents

监测制浆造纸系统中胶粘物分布情况的方法 Download PDF

Info

Publication number
WO2017210975A1
WO2017210975A1 PCT/CN2016/092390 CN2016092390W WO2017210975A1 WO 2017210975 A1 WO2017210975 A1 WO 2017210975A1 CN 2016092390 W CN2016092390 W CN 2016092390W WO 2017210975 A1 WO2017210975 A1 WO 2017210975A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
adsorption
test piece
papermaking
pulping
Prior art date
Application number
PCT/CN2016/092390
Other languages
English (en)
French (fr)
Inventor
张福山
王祥槐
马长明
Original Assignee
瑞辰星生物技术(广州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞辰星生物技术(广州)有限公司 filed Critical 瑞辰星生物技术(广州)有限公司
Publication of WO2017210975A1 publication Critical patent/WO2017210975A1/zh

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21GCALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00Other accessories for paper-making machines
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02Investigating particle size or size distribution
    • G01N15/0205Investigating particle size or size distribution by optical means
    • G01N15/0227Investigating particle size or size distribution by optical means using imaging; using holography
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/85Investigating moving fluids or granular solids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/34Paper

Definitions

  • the invention relates to the technical field of pulp and papermaking, in particular to a method for monitoring the distribution of stickies in a pulp and paper system. Background technique
  • Adhesive deposition is one of the most important factors affecting the yield and product quality of the pulp and paper process.
  • These stickies mainly come from three aspects: First, lipophilic substances originally present in papermaking fibers, such as fatty acids, resin acids, fatty acid esters, alcohols and alcohol esters; and second, when waste paper is used for papermaking, waste paper itself is introduced. Coating adhesives, printing inks, hot melt adhesives, pressure sensitive adhesives, etc.; Third, certain chemicals added during the pulping and papermaking process, such as reinforcing agents, sizing agents, defoamers and fillers.
  • the mesh When the stickies are deposited on the forming wire, the mesh will be blocked, which will make the water filtering difficult, and the problem of downtime cleaning time will be increased. If it is deposited on the press felt and the pressure roller, the service life of the felt will be shortened and the paper can be filtered; Sticking to the surface of the dryer can cause the paper to break or form paper holes and paper holes. If the glue remains in the paper, it will form stains and increase the paper disease; if the glue collects in the white water It becomes "anionic garbage", affects the use effect of cationic additives, and hinders the recycling of white water.
  • the pulp and paper industry applies various methods to control the adverse effects of stickies.
  • These methods mainly include mechanical and chemical methods, as well as biochemical methods.
  • the mechanical method is to separate the stickies particles from the papermaking slurry by using a process such as sieving, slag removal, washing, flotation, etc.; or applying a process such as hydrazine or dispersion to reduce the particle size of the stickies particles, thereby Reduce the harmfulness of stickies.
  • the chemical method is to add a chemical agent with different functions such as a dispersing agent, a fixing agent, a debonding agent and an adsorbing agent in the papermaking slurry to reduce the harm of the adhesive; or directly apply the cleaning agent or the cleaning agent to the pulping and papermaking.
  • Biochemical methods use biological enzymes to replace chemicals to degrade or passivate some of the major components of the stickies, thereby weakening the hazards of stickies.
  • fat hydrolyzing enzyme can degrade fatty acid ester in the stickies
  • polyester hydrolase can hydrolyze polyvinyl acetate in the stickies
  • amidase can hydrolyze polyamide hot melt in the stickies.
  • the stickies in the pulp and paper system can be divided into two categories according to their particle size: size > 0. 10mm or ⁇ 0. 15 is made of macrostickies, and conversely, smaller than this size is fine.
  • Microstickies o According to the way the glue is formed, it can be divided into primary stickies and secondary stickies.
  • Native stickies are those that are directly from pulp and paper.
  • the glue that is brought in; the secondary glue is the dispersed or dissolved glue that re-aggregates or other components in the papermaking slurry (such as sizing agent, reinforcing agent, retention and drainage aid) Formed by a combination of papermaking auxiliaries such as defoamers.
  • large stickies can be removed by sieving and slag removal. In addition to the removal of a part of the micro-adhesives, it is often necessary to use chemical or biochemical methods to control their hazards.
  • U.S. Patent No. 9,280,726 describes an in-line analyzer and method for large glue in pulp/white water. According to this method, a large class of glue particles in pulp/white water is first separated by a slurry classifier, and then the stickies particle suspension is placed in water, and an image of the stickies particles suspended in the water is photographed with a camera. Finally, computer software was used to analyze the amount and total amount of stickies in the image. This method is also limited to the determination of large stickies, but not to fine stickies. Moreover, this method also uses mechanical means to separate the stickies of the binder in the papermaking slurry, which has the disadvantage of being cumbersome and expensive.
  • U.S. Patent No. 8,160,305 (China Patent No. CN101910515B) describes a method and apparatus for measuring particle stickies in a pulp and paper slurry. According to this method, first, after inserting a piece of substrate into the papermaking slurry for a certain period of time, the substrate is taken out, an image of the particle stickies deposited on the substrate is captured by an image forming system, and then the particles in the image are counted and measured, and finally An inhibitor is added to the slurry to treat the stickies.
  • the imaging system used in this method includes an optical scanner, a digital or film camera, or a digital or film camera for use with a reflective microscope. However, this method does not involve how to distinguish between different colored contaminant particles in the papermaking slurry.
  • this method has an obvious drawback: the "insertion" is used to suspend the substrate in the pulp, and the matrix is difficult to withstand the large shear forces generated by the flow of the pulp.
  • the substrate is inserted in the middle of the sampling chamber.
  • the matrix has to be oriented parallel to the flow direction of the slurry in the sample chamber. This orientation is not conducive to sufficient contact of the substrate with the slurry, affecting the efficiency of the matrix to capture the glue.
  • US20140293040 except that it can capture only images of particles deposited on the viewing cell window, rather than images of the papermaking slurry.
  • U.S. Patent No. 7,842,165 Choinese Patent No. CN101802605B
  • QCM quartz crystal microbalance
  • the method should have the following characteristics: First, the range of measurement should be wide, and the measured stickies should include large stickies and fine stickies; The analysis steps should be as simple, fast and efficient as possible, avoiding the cumbersome and clumsy methods of chemical extraction or mechanical separation to separate the glue in the pulp, so that the entire pulp and paper system can be quickly given in a short period of time. The relative content of the stickies at the observation point; also, in addition to being reliable and reproducible, the analytical data of this method should be closely related to the degree of damage of the stickies on the paper machine. Summary of the invention
  • a method of monitoring the distribution of stickies in a pulp and paper system comprising the steps of:
  • the papermaking slurry of a predetermined sampling point in the pulping and papermaking system is passed through an adsorption test piece capable of adsorbing the granular adhesive substance on the surface, and adsorbing reaction with the adsorption test piece to make the granular adhesive substance in the papermaking slurry Adsorbing on the surface of the adsorption test piece;
  • the adsorption test piece is made of a transparent material that allows visible light to pass through;
  • Detecting obtaining an image of the above-mentioned adsorption test piece under at least two preset background color conditions; analyzing various properties of the particles in each image, and calculating the content of the granular adhesive substance at the predetermined sampling point, thereby obtaining a glue The distribution of the stickies in the pulp and paper system.
  • the inventors have noted in the study that the stickies in the papermaking slurry are often not a single color, but are colorful. These different colored particulate stickies are often caused by their different origins and properties. If only Using a single background to obtain an image of a granular stickies may lose that portion of the granular stickies that are similar in color to the background. For example, if you only use a black background to scan a grainy stick image, black or dark particles may not be visible; conversely, if you only use a white background to scan a granular stick, white or shallow Particles of color may be lost.
  • the above method for monitoring the distribution of stickies in the pulp and paper system uses a transparent adsorbent test piece to adsorb the granular stickies in the paper pulp, and then obtain the above transparent adsorbent test piece. At least two images with preset background color conditions can improve the accuracy and sensitivity of the glue. If the image of the granular stickies is scanned with a black and white background, respectively, both the light and dark parts of the granular stickies can be included. Therefore, the above method can measure various stickies in a pulp and paper system by obtaining an image of a granular adhesive in different color backgrounds, and has the advantage of good monitoring effect.
  • the adsorption test piece is in the form of a film or a sheet, and the adsorption test piece comprises a support layer and an adsorption layer coated on the surface of the support layer. Adsorption specimens in film or sheet form for easy image acquisition in different color backgrounds.
  • the support layer is selected from the group consisting of: a colorless transparent polymethyl methacrylate layer, a polycarbonate layer, a polyethylene terephthalate layer, a polystyrene layer, a polyvinyl chloride At least one of a layer, a polypropylene layer and a polyethylene layer;
  • the adsorption layer is selected from the group consisting of: a polyacrylate layer, a styrene-butadiene latex layer, a polyvinyl acetate layer, a polybutadiene layer, a polyisoprene layer , ethylene vinyl acetate layer, epoxy acrylate layer, styrene acrylic layer, polyvinyl alcohol layer, natural rubber layer, resin acid layer, fatty acid ester layer, terpene resin layer, animal wax layer, vegetable wax layer and paraffin wax At least one of the layers.
  • the support layer made of the above transparent polymer material has the characteristics of good light transmittance and high mechanical strength.
  • the above adsorbing layer has a special affinity for the stickies in the papermaking slurry, and can rapidly adsorb the particulate stickies from the slurry.
  • the adsorption layer is selected from the group consisting of: a polyacrylate layer, a polyvinyl acetate layer, and an ethylene acetate. At least one of the vinyl ester layers; if the pulping and papermaking system is based on recycled magazine paper, the adsorption layer is selected from the group consisting of: a styrene-butadiene latex layer, a polyvinyl acetate layer, and an ethylene vinyl acetate layer. At least one of them;
  • the adsorption layer is selected from at least one of an epoxy acrylate layer, a styrene acrylic layer, and a polyacrylate layer.
  • the adsorption layer is selected from at least one of a resin acid layer, a fatty acid ester layer, and a terpene resin layer.
  • the adsorption of the adsorbent specimen to the granular stickies depends mainly on the chemical composition of the stickies and the adsorbent layer. According to the principle of similar compatibility, if the stickies and the adsorbent layer have similar chemical compositions, or their chemical compositions have similar properties, then the adsorption test piece has a strong adsorption force on the granular stickies. Therefore, according to the above arrangement, the adsorbent layer material having a better adsorption capacity with the particulate stickies to be monitored in the pulp and paper system has a better adsorption effect.
  • the papermaking slurry flows at an angle of 45-90 degrees to the surface of the adsorption test piece to the adsorption test piece.
  • the inventors have found that, in conventional techniques, it is generally intended to reduce the flow of papermaking slurry.
  • the impact on the sampling equipment has to take the orientation of the sampling equipment parallel to the flow direction of the papermaking slurry. However, this orientation is not conducive to sufficient contact between the papermaking slurry and the sampling equipment, which affects the capture efficiency of the sampling equipment.
  • the papermaking slurry and the surface of the adsorption test piece flow to the adsorption test piece at a certain angle, the papermaking slurry can be fully contacted with the adsorption test piece, thereby accelerating the adsorption process of the granular adhesive on the surface of the adsorption test piece.
  • the adsorption reaction comprises an off-line reaction and/or an on-line reaction
  • the off-line reaction is: taking a paper slurry of a predetermined sampling point, and placing it on a pre-installed adsorption test piece.
  • the papermaking slurry in the reaction vessel is kept in a flowing state to react with the adsorption test piece;
  • the on-line reaction is: withdrawing a stream of paper pulp slurry from a predetermined sampling point, and maintaining the papermaking slurry flowing through the surface of the adsorbent test piece to cause an adsorption reaction.
  • the paper slurry can be maintained in a manner that mechanically agitates, shakes, turns, and/or flips. Different methods can be selected for sampling according to the needs of practical applications.
  • the adsorption reaction time is 5 seconds to 4 hours; the adsorption reaction temperature is 1 ° C -99 ° C ; the adsorption reaction is solid dry weight 5% ⁇
  • the surface area of the adsorption test piece can be 0. 25 cm 2 -600cm 2 .
  • the granular glue in the papermaking slurry is captured by the glue capturing device, the glue capturing device comprising a reaction container and the adsorption test piece,
  • the reaction vessel includes a receiving chamber for containing a papermaking slurry, and an adsorption surface of the adsorption test piece is located within the receiving chamber.
  • At least one of the at least two preset background colors is a complementary color complementary to a granular adhesive color.
  • the background color includes at least white and black.
  • the white and black background colors have good versatility, and the light and dark granular adhesives can be prominently highlighted in the image, thereby improving the quality of the scanned image and improving the resolution of the scanning.
  • the adsorbent test piece in the detecting step, analyzing the roundness and/or the aspect ratio of the particles in the image, and removing the papermaking fibers having a circularity less than 0.1 and/or an aspect ratio greater than 10, and calculating the granularity The content of the stickies.
  • the inventors have found in the study that the adsorbent test piece also adsorbs particles which are not stickies, for example, the most common non-stick particles are fibers or fine fibers. These objects are adsorbed on the surface of the adsorbent specimen, indicating that their surfaces are more or less sticky with impurities. Therefore, these objects are sometimes considered as part of the composition of the glue. However, it is sometimes necessary to remove them from the detected particles.
  • an image processing system can be applied to filter the particle image based on the selected parameters. Since these fibers and fine fiber particles generally have a relatively small roundness and a relatively large particle aspect ratio as compared with a granular stickies, they can be judged by the above method and removed. Papermaking fibers in the image to improve the accuracy of the calculated particulate stickies.
  • an image of the adsorption test piece under the preset background color condition is acquired by the image acquisition device, and the image collection device includes an image collector and a background platform, and the image collector is used for And collecting an image of the adsorption test piece, wherein the background platform is used to match the adsorption test piece, the background platform comprises at least two background faces of the preset background color, and at least two of the background faces are switchable with each other.
  • Obtaining an image of the adsorbed test piece under different background color conditions by using the image capturing device capable of switching the color of the background surface, for example, placing the adsorbed test piece on the background platform, the image collecting device acquiring the image from above the adsorption test piece, or using the background platform
  • the adsorption test piece is covered, and the image acquisition device acquires an image from under the adsorption test piece.
  • the ability to capture images with a device that can switch background colors is convenient, fast, and simple to operate.
  • the analysis process includes preprocessing, image measurement, and classification steps;
  • the pre-processing step includes: at least one of brightness correction, color extraction, contrast conversion, edge enhancement, and binarization processing;
  • the image measuring steps include: particle positioning, spot determination, edge determination, area measurement, point-to-point distance measurement, point-to-edge distance measurement, edge-to-edge distance measurement, circle diameter measurement, angle measurement, roundness measurement, and length At least one of width ratio measurements;
  • classification is performed by particle size, particle roundness, and/or particle aspect ratio.
  • the image processing system can select a PC Based system, a PLC system, or an embedded system, and analyzes the image of the glue under different background colors by the above steps and methods, and has a good analysis effect.
  • each property of the particle includes: a total number of particles, an area of each particle, a circle diameter of each particle, a roundness of each particle, a length of each particle, a width of each particle, and each Particle aspect ratio, total particle area, average particle area, average diameter of particles, average length of particles, average width of particles, average roundness of particles, average aspect ratio of particles, particle size distribution, particle roundness distribution, particle length distribution At least one of a particle aspect ratio distribution and a total particle area percentage.
  • the present invention has the following beneficial effects:
  • a method for monitoring the distribution of stickies in a pulp and paper system wherein a transparent adsorbent test piece is used to adsorb particulate stickies in the paper pulp slurry, and then the above transparent adsorbent test pieces are obtained in at least two types of preheating
  • a transparent adsorbent test piece is used to adsorb particulate stickies in the paper pulp slurry, and then the above transparent adsorbent test pieces are obtained in at least two types of preheating
  • the method of the present invention since the method of the present invention has the advantages of simple operation, low cost, and high reliability, unlike the currently available methods for measuring various stickies, the method of the present invention provides not only a certain one in the pulp and paper system. The condition of the stickies in the parts, but the distribution of the stickies throughout the system. This information not only helps to fully understand the flow of the glue in the whole system, but also helps to analyze the efficiency of the glue removal in all major parts of the system, thus providing a more powerful way to effectively control the damage of the glue. s help.
  • the method also overcomes the shortcomings of current time-consuming, labor-intensive and cumbersome or expensive instruments in the analysis and determination of stickies, which can be used to capture an off-line or in-line capture of a pulp and paper system using an adhesive capture device.
  • the sticking efficiency can be improved, and the capturing device is simple in structure, low in cost, and easy to operate.
  • multiple such capture devices can be used simultaneously to capture the stickies in the paper pulp slurry at multiple sampling points in a pulp and paper system, thereby reducing the daily monitoring of the stickies distribution of the stickies in the pulp and paper system. Cost and operational difficulty.
  • FIG. 1 is a schematic structural view of a capture device for off-line reaction in the present invention
  • FIG. 2 is a schematic structural view of a capture device for an online reaction in the present invention
  • FIG. 3 is a schematic structural view of a detachable capture device of the base of the present invention.
  • FIG. 4 is a schematic structural view of an image capture device according to the present invention.
  • Figure 5 is a schematic structural view of a flat type background platform according to the present invention.
  • FIG. 6 is a schematic structural view of a disc type background platform according to the present invention.
  • Figure 7 is a schematic structural view of a conveyor belt type background platform according to the present invention.
  • Fig. 8 is an image of a granular stickies in Example 1.
  • 110 housing cavity; 111. cylinder; 112. base; 120. inlet pipe; 130. outlet pipe; 140.
  • a method of monitoring the distribution of stickies in a pulp and paper system comprising the steps of:
  • the papermaking slurry of a predetermined sampling point in the pulping and papermaking system is passed through an adsorption test piece capable of adsorbing the granular adhesive substance on the surface, and adsorbing reaction with the adsorption test piece to make the granular adhesive substance in the papermaking slurry Adsorbing on the surface of the adsorption test piece;
  • the adsorption test piece is made of a transparent material that allows visible light to pass through;
  • Detecting obtaining an image of the above-mentioned adsorption test piece under at least two preset background color conditions; analyzing various properties of the particles in each image, and calculating the content of the granular adhesive substance at the predetermined sampling point, thereby obtaining a glue The distribution of the stickies in the pulp and paper system.
  • Pulping processes suitable for use in the present invention include, but are not limited to, various chemical pulps, various mechanical pulps and chemical mechanical pulps, and various waste paper recycled pulps.
  • Papermaking processes suitable for use in the present invention include, but are not limited to, packaging paper, boxboard, corrugated base paper, household paper, newsprint, uncoated printed writing paper, coated printing paper, white paperboard, and various specialty papers and paperboards. .
  • the stickies in the papermaking slurry are often not a single color, but are colorful, such as red, blue, yellow, green, black or dark, white. Or light colors and so on. These different colored particulate stickies are often caused by their different origins and properties. If only a single background is used to obtain an image of the granular stickies, some of the granular stickies similar to the background color may be lost. For example, if you only use a black background to scan a grainy stick image, black or dark particles may not be visible; conversely, if you only use a white background to scan a granular stick, white or shallow Particles of color may be lost.
  • the adsorption test piece is a transparent film that allows visible light to pass through.
  • the transparent adsorption test piece is used to adsorb the granular adhesive in the paper pulp, and then the image of the transparent adsorption test piece under at least two preset background colors is obtained, which can improve the precision and sensitivity of the glue. . If the image of the granular stickies is scanned with a black and white background, respectively, both the light-colored and dark-colored granular stickies can be included. Therefore, the method of the present invention can determine various stickies in a pulp and paper system by obtaining images of granular adhesives in different color backgrounds, and has the advantage of good monitoring effect.
  • the method for monitoring the distribution of stickies in a pulp and paper system of the invention is suitable for monitoring various color granular adhesives, such as red, blue, yellow, green, black or deep. Color, white or light color, etc. And a large particle-shaped stickies having a particle size of less than 0.15 mm or 0.1 mm, and a large-grained stickies having a particle size of more than 0.1 mm or 0.15 mm.
  • the glue in the pulp and paper system does not have a fixed chemical composition, its chemical composition varies greatly depending on the papermaking raw materials and the production process, but the method of the present invention is also suitable for monitoring most pulp and paper processes.
  • the inorganic particles further include: kaolin, talc, bentonite, calcium carbonate, titanium dioxide, or a synthetic silicate.
  • the above predetermined sampling points are a plurality of sampling points selected in different parts of the system according to the purpose and requirements of the monitoring and the process flow characteristics of the pulp and paper system.
  • the pulp and paper system described herein includes each from the pulping stage to the sheet drying section. Stages. Some system pulping sections and papermaking sections are separate, and some are joined together, and are applicable to the process of the present invention.
  • sampling points include, but are not limited to, the following parts of the pulp and paper system: pulper outlet, high concentration and low concentration cleaner, coarse sieve and fine sieve machine, fiber grading sieve, pulp concentrator, refiner, heat dispersion Machine, bleaching tower, flotation deinking equipment, air flotation tank, discharge tower, slurry storage tower, slurry pool, slurry tank, pressure screen, forming wire, headbox.
  • the slurry of the present invention includes, but is not limited to, a feed port, a discharge port, a slag discharge port, and/or a papermaking slurry inside the sampling points taken from these sampling points, slurry, filtrate, white water, etc. .
  • sampling points The determination of specific sampling points depends first and foremost on the purpose and requirements of the monitoring. Some monitoring tasks require monitoring the distribution of stickies throughout the pulp and paper system, either to monitor the operating efficiency or stick removal rate of a particular pulp and paper stage. For the former, the sampling points are distributed throughout the main parts of the system, while the latter only needs to determine a small number of sampling points around the part to be monitored.
  • the determination of the sampling point is also dependent on the process flow of the pulp and paper.
  • the process flow of different pulp and paper systems is quite different. For example, the same is 0CC papermaking system, some from pulper to headbox, including many stages in the middle, such as fiber grading sieve, multi-stage fine screening, slag removal, thickener, refiner, heat dispersion, etc. Only through simple slag removal and coarse screening. Obviously, if you want to monitor the distribution of the entire system's stickies, the former has more sampling points than the latter.
  • the monitoring method of the present invention is used to monitor the distribution of particulate stickies in a pulp and paper system, after the sampling points are determined, the next step is to use the adsorption method to pellet the slurry in each sampling point. The glue is separated.
  • the adsorbent test piece In order to achieve the purpose of adsorbing the particulate stickies, the adsorbent test piece only needs to have a surface capable of adsorbing the particulate stickies, and the shape and size thereof can be designed according to specific requirements.
  • the adsorption test piece is in the form of a film or a sheet, and the adsorption test piece comprises a support layer and an adsorption layer coated on the surface of the support layer. More preferably, the support layer is selected from the group consisting of: a colorless transparent polymethyl methacrylate (PMMA) layer, a polycarbonate (PC) layer, a polyethylene terephthalate (PET) layer, polyphenylene.
  • PMMA colorless transparent polymethyl methacrylate
  • PC polycarbonate
  • PET polyethylene terephthalate
  • PS polyacrylate
  • PVC polyvinyl chloride
  • PP polypropylene
  • the support layer made of the above transparent polymer material has the characteristics of good light transmittance and high mechanical strength.
  • the above adsorbing layer has a special affinity for the stickies in the papermaking slurry, and can rapidly adsorb the particulate stickies from the slurry.
  • the above-mentioned adsorption test piece including the support layer and the adsorption layer can be prepared by various methods, and when the adsorption layer material is applied to the support layer, a solvent coating, a latex coating, or a hot melt coating method can be employed. Among them, the solvent coating method dissolves the material of the adsorption layer in an organic solvent, and then uniformly applies the obtained solution to the surface of the support layer. After the solvent was volatilized, it was further cut into the required size to form an adsorption test piece.
  • the adsorbent layer material is emulsified in water, and then the obtained emulsion is applied to the surface of the support layer, and after drying, the adsorbent test piece can be formed.
  • the adsorption layer material is heated and heated in the absence of water or an organic solvent, so that it has a A fluid liquid is then applied to the surface of the support layer and then cooled to solidify the coating.
  • a suitable adsorption layer thickness can be selected between l ffl-lOO ffl range, and a more suitable adsorption layer thickness is between 5 ffl and 50 ffl.
  • the absorbent test pieces can often be replaced by various tape or film products available on the market. This is because most of these products have the essential features of the absorbent test pieces described in the present invention. These features include a suitable support layer and adsorption layer.
  • the support layer (the support medium) of many of these products is made of a colorless and transparent polymer material, and the thickness is usually between 0.05 mm and 0.5 mm, and the width is from several millimeters to more than one meter. Up to tens of meters, even hundreds of meters.
  • the adsorption layer i.e., the viscous coating
  • Suitable products include but are not limited to: B0PP tape, PE tape, PET tape, 0PP tape, PVC tape, etc.
  • the adsorption of the adsorbent specimen to the particulate stickies depends mainly on the chemical composition of the stickies and the adsorbent layer. According to the principle of similar compatibility, if the stickies and the adsorbent layer have similar chemical compositions, or their chemical compositions have similar properties, then the adsorption test piece has a strong adsorption force on the granular stickies.
  • the adsorption layer is selected from the group consisting of: a polyacrylate layer, a polyvinyl acetate layer, and ethylene vinyl acetate. At least one of the layers;
  • the adsorption layer is selected from the group consisting of: a styrene butadiene latex layer, a polyvinyl acetate layer, and an ethylene vinyl acetate layer;
  • the adsorption layer is selected from at least one of an epoxy acrylate layer, a styrene acrylic layer, and a polyacrylate layer.
  • the adsorption layer is selected from at least one of a resin acid layer, a fatty acid ester layer, and a terpene resin layer.
  • the adsorption layer material which has a good adsorption capacity for the granular adhesive to be monitored in the pulp and paper system has a good adsorption effect.
  • the sampling device in the sampling step, only the paper pulp slurry needs to flow through the surface of the adsorption test piece, so that the granular glue can be adsorbed, whereas in the conventional technology, the sampling device is usually used to reduce the flow of the paper pulp.
  • the sampling device has to be oriented parallel to the flow of the papermaking slurry. However, this orientation is not conducive to sufficient contact between the papermaking slurry and the sampling equipment, affecting the capture efficiency of the sampling equipment for the glue.
  • the paper pulp slurry is flowed to the adsorption test piece at an angle of 45-90 degrees to the surface of the adsorption test piece, so that the paper pulp slurry can be sufficiently contacted with the adsorption test piece, thereby accelerating the granular adhesive material in the adsorption test.
  • a sticker trapping device including a reaction vessel and a sorbent test piece including a accommodating cavity for accommodating a papermaking slurry, and an adsorption surface of the absorbing test piece may be employed Said to accommodate the cavity.
  • some necessary peripheral aids are required; these include, but are not limited to: necessary piping, pipe connections, pipe valves, fluid pumps, flow meters, mechanical mixing equipment or Shake the device and more.
  • the sticking efficiency can be improved, and the capturing device has a simple structure and a cost. Low cost and easy to operate.
  • multiple such capture devices can be used simultaneously to capture the stickies in the paper pulp slurry at multiple sampling points in a pulp and paper system, thereby reducing the cost and operation of daily monitoring of the stickiness distribution of the pulp and paper system. Difficulty.
  • the volume of the receiving chamber containing the papermaking slurry containing the papermaking slurry, it can be understood that, if an off-line reaction is adopted, a larger receiving cavity is required to ensure the representativeness of the sampling, such as the method of online reaction, which is relatively small.
  • the chamber can be accommodated to meet the demand.
  • the volume of the accommodating cavity is selected from the range of 20 ml to 20,000 ml, and a suitable volume of the accommodating cavity is selected from the range of 50 ml to 5000 ml, and a more suitable accommodating cavity volume is selected from the range of 100 ml to 2000 ml. between.
  • the shape of the receiving cavity is selected from the group consisting of a cylindrical shape, an elliptical cylindrical shape, a square cylindrical shape, a rectangular prism shape, or any suitable geometric shape, and a suitable receiving cavity shape is selected from a cylindrical shape or a square cylindrical shape.
  • the material from which the receiving cavity is made is selected from the group consisting of metal, glass and/or plastic, and a suitable reaction vessel material is selected from plastics.
  • the adsorption test piece used in the present invention can be installed at any position in the accommodating cavity, and as long as the adsorption test piece is sufficiently supported, it can withstand the impact of the slurry flow from various directions to ensure the adsorption of the adsorption test piece during the adsorption reaction.
  • the surface energy can be sufficiently in contact with the papermaking slurry, but a suitable position is to mount the adsorption test piece at the bottom of the accommodating cavity, parallel to the bottom of the accommodating cavity, and to face the absorbing surface facing the inside of the accommodating cavity, such that It can be ensured that the paper pulp slurry is in sufficient contact with the adsorption layer of the adsorption test piece during the adsorption reaction, and the adsorption efficiency of the stickies is improved.
  • the sorbent test piece can be mounted directly below an opening in the bottom of the accommodating cavity.
  • the shape of this opening is substantially the same as that of the adsorbent test piece, but the size is slightly smaller.
  • a support plate may be added under the adsorbent test piece. Another method of installing the sorbent test piece is to first fix the sorbent test piece in a frame and then mount the frame with the sorbent test piece at the bottom of the accommodating cavity.
  • the shape of the frame used to fix the adsorbent specimen is roughly equivalent to that of the adsorbent specimen, and the outer dimension is slightly larger than that of the adsorbent specimen, but the middle opening is slightly smaller than the adsorbent specimen.
  • the preferred frame should have two upper and lower pieces. This allows the absorbent test piece to be sandwiched between the two frames.
  • the area of the adsorption test piece used in the present invention is in the range of 0. 25cm 2 -600cm 2, more suitable adsorbent specimen area Between the range of 2 cm 2 to 100 cm 2d , a more suitable adsorption test piece area is selected from the range of 5 cm 2 to 50 cm 2 .
  • the shape of the adsorbent test piece may be selected from a square, a rectangle, a circle, an ellipse, or any suitable geometric shape.
  • the off-line reaction is: taking a paper pulp slurry of a predetermined sampling point, placing it in a reaction vessel pre-installed with the adsorption test piece, and maintaining the papermaking slurry in the reaction vessel in a flowing state to react with the adsorption test piece.
  • the paper slurry can be maintained in a mechanically agitated, shaken, rotated, and/or inverted manner.
  • the capture device including a reaction vessel and a sorbent test piece, the reaction vessel including a accommodating cavity 110 for accommodating a papermaking slurry, the adsorption test
  • the adsorption surface of the piece 200 is located within the receiving cavity 110.
  • the reaction vessel should also include an agitator 140 for maintaining the flow of the papermaking slurry within the containment chamber 110.
  • the receiving chamber 110 of the reaction vessel is a cylinder with two ends open.
  • the bottom of the accommodating cavity 110 is composed of two upper and lower base plates.
  • the upper base plate 151 is connected to the bottom of the receiving cavity, and the upper base plate 151 has an opening in the middle thereof.
  • the opening of the upper base plate 151 may be circular, square, rectangular, or other shape; the area may be equal to or smaller than the reaction container.
  • the lower base plate 152 is fixed by fixing
  • a screw or other method is fixed below the upper base plate 151.
  • the adsorption test piece 200 is sandwiched between the upper and lower base plates, and its adsorption layer faces the inside of the reaction vessel.
  • a paddle stirrer 140 is disposed above the adsorption test piece 200, and the agitator shaft is perpendicular to the surface of the adsorbent test piece.
  • the on-line reaction is: withdrawing a stream of paper pulp slurry from a predetermined sampling point, and maintaining the papermaking slurry flowing through the surface of the adsorbent test piece to cause an adsorption reaction.
  • the capture device comprising a reaction vessel and a sorbent test piece, the reaction vessel comprising a containment chamber 110 for containing a papermaking slurry, the adsorption The adsorption surface of the test piece 200 is located within the receiving cavity 110.
  • the reaction vessel further includes an inlet pipe 120 and a liquid outlet pipe 130.
  • the accommodating cavity 110 is a closed accommodating cavity, and is provided with a liquid inlet port and a liquid outlet port, and the liquid inlet pipe 120 and the inlet pipe 120
  • the liquid outlet is connected to the liquid outlet, and the liquid inlet is disposed at an upper portion of the receiving cavity 110, such as a top or a side wall, and the liquid outlet is disposed at the The side wall of the cavity 110 is received.
  • the bottom structure of the reaction vessel is substantially the same as that shown in Figure 1.
  • a branch slurry is taken from the pulping and papermaking system and flows into the adsorption reaction vessel through the feed port, and comes out from the discharge port after coming into contact with the adsorption layer.
  • the adsorption of the particulate stickies in the slurry on the surface of the adsorbent specimen is accelerated and enhanced, thereby enhancing the capture of the particulate stickies. effectiveness.
  • the bottom of the adsorption reaction vessel may be open or have an opening, and a removable base is attached.
  • the accommodating cavity includes a cylindrical barrel, a sample holder and a base, the base is detachably mounted on the bottom of the cylinder, and the test piece holder is clamped and fixed to the Between the cylinder and the base, the sample holder is provided with an adsorption mounting area for fixing the adsorption test piece.
  • the accommodating cavity of the device is mainly composed of a cylindrical cylinder 111 and a disk-shaped base 112.
  • the adsorbent test piece 200 is first mounted on a circular test piece holder 150, and then the test piece holder 150 is mounted on the base 112 of the receiving cavity, and then the sealing ring 160 is attached, and finally the threaded connection is
  • the cylinder 111 is mounted on the base 112.
  • the circular specimen holder 150 has the same area and shape as the outer cross section of the cylinder 111, but has an opening in the middle.
  • the shape of the opening may be circular, square, rectangular, or other shape; its area is slightly smaller than the absorbent test piece so that the absorbent test piece can cover the entire opening.
  • the adsorption reaction of the glue with the adsorption test piece requires a certain reaction time, and the reaction time of the suitable adsorption reaction is selected from 5 seconds to 4 hours, and the suitable adsorption reaction time is selected from 10 seconds to 20 minutes. Between the ranges, a more suitable adsorption reaction time is selected from the range of 20 seconds to 10 minutes.
  • the length of the desired adsorption reaction time depends mainly on the concentration of the slurry and the temperature of the adsorption reaction.
  • the slurry concentration referred to herein means the solid dry weight percentage in the slurry, and the pulp concentration or the slurry concentration as referred to in the present invention means the solid dry weight percentage in the slurry.
  • the appropriate concentration of the slurry is in the range of 0. 5%-4%. between.
  • concentration of the slurry is too low, the adsorption rate of the granular stickies is slow, which affects the adsorption efficiency; on the contrary, if the concentration of the slurry is too high, the fluidity of the slurry in the reaction vessel is poor, which is also unfavorable for the adsorption of the granular stickies.
  • the suitable adsorption reaction temperature ranges from 1 °C to 99 °C, and the suitable reaction temperature range is between 10 °C and 60 °C. The more suitable reaction temperature range is between 20 °C and 50 °C. .
  • the temperature of the paper pulp slurry is too high or too low to be detrimental to the adsorption of the particulate stickies on the surface of the adsorbent specimen.
  • the adsorbent sample to which the particulate adherend is adsorbed is subjected to appropriate rinsing to remove the fibers and the unrelated foreign matter adhering to the test piece, and after drying, it can be used for further use.
  • the relative content of the stickies in the slurry is analyzed by image acquisition and processing techniques, specifically to obtain images of the adsorbed test pieces under at least two preset background color conditions; and further analyzed by an image processing system. And measuring the nature and quantity of granular stickies. Finally, the relative content of the particulate stickies at each sampling point is listed to obtain the distribution of the stickies in the pulp and paper system.
  • the background color it is preferable to use a complementary color complementary to the color of the granular adhesive as the background color, which can significantly improve the quality of the scanned image and improve the resolution of the scanning.
  • the background color includes at least white and black.
  • the white and black background colors have good versatility, which can highlight the light and dark granular adhesives in the image, improve the quality of the scanned image, and improve the scanning resolution.
  • the image processing results When analyzing and processing the image of the particulate stickies, it further includes filtering the image processing results to remove the stickies that are not particulate.
  • the most common non-stick particles are fibers or fine fibers. These objects are adsorbed on the surface of the adsorbent test piece, indicating that their surfaces are more or less sticky with impurities. Therefore, these objects are sometimes considered as part of the composition of the glue. However, it is sometimes necessary to remove them from the detected particles. These fibers and fine fiber particles generally have a relatively small roundness and a relatively large particle aspect ratio due to the particulate stickies. If it is desired to remove particles from these objects, an image processing system can be applied to filter the particle image based on the selected parameters. The content of the granulated stickies was calculated by discarding the papermaking fibers having a circularity of less than 0.1 and/or an aspect ratio of more than 10 as judged by the image processing system.
  • the image of the adsorption test piece under the preset background color condition is preferably acquired by the image acquisition device, and the image collection device includes an image collector and a background platform, and the image collector uses And collecting an image of the adsorption test piece, wherein the background platform is used to match the adsorption test piece, for example, placing the adsorption test piece Placed on the background platform, the image acquisition device acquires an image from above the adsorption test piece, or covers the adsorption test piece with a background platform, and the image acquisition device acquires an image from under the adsorption test piece.
  • the background platform includes at least two background faces of preset background colors, and at least two of the background faces are switchable with each other.
  • the image capture device further includes a light source for providing illumination to the image collector;
  • the light source suitable for use in the image capture device of the present invention includes but is not limited to: LED (Light Emitting Diode), fluorescent lamp, halogen lamp, metal halide Lights, neon lights.
  • the illumination of the light source can be transmissive, specular or diffuse.
  • FIG. 4 The structure and working principle of the above image collecting device are as shown in FIG. 4.
  • a absorbing test piece 200 with a frame-shaped test piece holder 150 adsorbs sticky particles of different color glues from the paper pulp slurry (light-colored granular adhesive)
  • the object 410 and the dark granular adhesive 420) are placed on a background platform 320 having black and white colors.
  • Light emitted by the light source 330 is irradiated onto the adsorption test piece 200, whereby diffuse reflection and/or specular reflection is received by the image collector 310 (camera) and an image is formed.
  • the background platform can be selected from the group consisting of: a flat background platform, a disc background platform, or a conveyor belt background platform.
  • the flat background platform includes a slidable background panel having a background 329 surface of at least two colors.
  • the background platform has a slider (not shown) that allows the background platform to slide back and forth in a horizontal direction, changing the color of the background.
  • the disc-type background platform includes a background turntable 322 and a rotating shaft 323.
  • the background turntable 322 is mounted on the rotating shaft 323 and rotatable around the rotating shaft 323.
  • the background surface 329 of at least two colors (four in the figure); driving the background turntable 322 by electric or mechanical means to rotate the 323 axis to a certain angle, thereby changing the color of the background, for the same group of particles
  • Shaped stickies light granules of glue 410 and dark granules of glue 420
  • the conveyor belt background platform includes a rotating roller 324 and a background belt 325.
  • the background belt 325 can be rotated around the rotating roller 324 by the rotating roller 324.
  • the background belt 325 is provided with at least two.
  • One of the two rotating rollers 324 is driven electrically or mechanically, and the rotating roller drives the multicolor background strip 325 a certain distance to convert the background from one color to another.
  • Multicolor background strips can be available in black and white only, or as needed, with a wider variety of colors to make the same set of granular stickies (light granules of sticky material 410 and dark granules)
  • the glue 420) produces different images with different color background faces 329 as backgrounds.
  • An image collector suitable for use in the image capture device of the present invention is a camera selected from a black and white or color line camera having a resolution of more than 500 pixels, or a black and white or color line array having a resolution of more than 200,000 pixels.
  • a camera suitable for use in the present invention includes a CCD (Charge Coupled Device) camera and a CMOS (Complementary Metal-Oxide Semiconductor) Pieces) Camera.
  • the image of the granular adhesive obtained by the above apparatus and method can be saved as a graphic record of the pulp and paper production process or as a graphic data of the experimental results. This increases the reliability and credibility of production records and experimental results.
  • the properties of the particles in the image are analyzed by an image processing system selected from the group consisting of a PC Based system, a PLC system, or an embedded system.
  • the analysis process includes preprocessing, image measurement, and classification steps;
  • the pre-processing step includes: at least one of brightness correction, color extraction, contrast conversion, edge enhancement, and binarization processing;
  • the image measuring steps include: particle positioning, spot determination, edge determination, area measurement, point-to-point distance measurement, point-to-edge distance measurement, edge-to-edge distance measurement, circle diameter measurement, angle measurement, roundness measurement, and length At least one of width ratio measurements;
  • classification is performed by particle size, particle roundness, and/or particle aspect ratio.
  • the papermaking fibers can be excluded by analyzing the roundness of the particles and/or the aspect ratio of the particles after the image measuring step, as needed;
  • the properties of the particles in the image are analyzed by the image processing system described above, including but not limited to: total number of particles, area of each particle, circle diameter of each particle, roundness of each particle, length of each particle, width of each particle, each Particle aspect ratio, total particle area, average particle area, average diameter of particles, average length of particles, average width of particles, average roundness of particles, average aspect ratio of particles, particle size distribution, particle roundness distribution, particle length distribution , particle aspect ratio distribution, total particle area percentage, etc.
  • the stick catching apparatus of this embodiment includes a reaction vessel and a absorbing test piece, and the reaction vessel includes a accommodating cavity for accommodating the pulping slurry, and the absorbing test piece is fixed in the accommodating cavity.
  • a pair of frame-shaped test piece holders are provided, and the outer diameter of the frame-shaped test piece frame is 70 mm X 70 mm, and the opening between them is 54 mm X 40 mm.
  • the adsorption test piece includes a support layer and an adsorption layer coated on the surface of the support layer, such as a transparent sealing tape as a adsorption test piece.
  • a transparent sealing tape was used as the adsorption test piece, and its width was 60 mm or 48 mm. Take a transparent sealing tape with a length of about 60 and attach it to the opening in the middle of one of the specimen holders, and then install another piece of specimen holder so that the upper and lower specimen holders are sandwiched with tape. The pieces are mounted to the specimen holder.
  • the above-mentioned specimen holder to which the adsorption test piece was mounted was attached to the bottom of the accommodating chamber of a reaction vessel having a volume of 600 ml, thereby obtaining a sticker trapping device.
  • the paper slurry sample to be tested is adjusted to the desired slurry concentration and preheated to the desired temperature.
  • 500 ml of the above papermaking slurry was placed in the above-mentioned reaction vessel (i.e., a sticker trapping device) to which the adsorbent test piece was attached. Then, stir or vibrate Shake the way to keep the reaction for a certain period of time.
  • the paper pulp slurry in the reaction vessel was removed, the adsorbent test piece was taken out, and the fibers attached to the test piece and the unrelated foreign matter were gently washed away with a wash bottle. After the test piece is air-dried, it is used for the next image acquisition.
  • the processed adsorbent test piece is inserted into the window of the image acquisition device, and the image of the test piece is collected under the appropriate background color, aperture, focal length and necessary parameters. After image acquisition was completed, the number and area of particles in the image were measured using image analysis software imagej 1. 49v. Then, calculate the relative amount of stickies of the pulp according to the following formula C-.
  • A is the total area of the particles in the scanned image (pixels); A is the scanned area of the adsorbent specimen.
  • the sticker removal rate at each sampling point in the pulp and paper system is calculated by the following formula:
  • G and G are the relative stickies concentration of the pulper outlet (or coarse screen outlet) and the sampling point, respectively, and i represents the individual sampling points after the pulper outlet (or coarse screen outlet).
  • G and G are the relative concentrations of the stickies of the slurry and the good pulp, respectively.
  • the method of the present invention is shown in this example to determine the distribution of stickies in a papermaking system.
  • the test was carried out on the third paper of a paper mill in Central China.
  • the paper machine uses 0CC as raw material and has a daily output of about 1200 tons of cattle cardboard.
  • the core and bottom production lines of the paper machine include the following main stages: pulper, high concentration cleaner, unloading tower, coarse screening machine, grading sieve; after the grading sieve, the long fiber pulp line passes through the heavy slag cleaner , four-stage fine screening, multi-plate concentrator, heat dispersing machine, grinding machine, long-fiber slurry tower, mixing tank, headbox; short-slurry pulp line through heavy slag remover, multi-plate concentrator, fluff pulp Tower, matching tank, headbox.
  • sampling points of the test include: pulper outlet, coarse sieved pulp outlet, grading sieve long fiber outlet, grading sieve staple fiber outlet, fine sieved fine pulp outlet, fine sieve tail slurry outlet, heat disperser outlet, bottom slurry box , core layer headbox.
  • the specific test method is as follows: First, the paper pulp is passed through a 200 mesh screen to separate the fiber from the white water, and then the fiber and the white water are re-mixed in proportion to a slurry having a concentration of 2% (as a dry weight percent of the solid), and then 500 g of the slurry was taken at 35 ° C for the adsorption reaction experiment.
  • Use "Scotch Packaging Tape” transparent sealing tape purchased from: Costco store in the United States, polypropylene film on the support layer, polyacrylate adhesive on the adsorption layer) as the adsorption test piece.
  • the adsorption reaction time was 10 minutes.
  • the image acquisition settings are: black and white two-color background consisting of black and white plastic sheets, the color mode is black and white.
  • the image area is 2500 X 1800 pixels and the image resolution is 1200 dpi.
  • the threshold is 40, and the resulting image is mainly white or light-colored granular adhesive; while scanning with a white background, the threshold is 128, and the resulting image is mainly black or dark granular. Stickies.
  • the image of the granular stickies as shown in Fig. 8 was obtained by the above method, and the results obtained by analyzing the images are shown in the following table.
  • the stickies in the pulp and paper system are mainly light colors, and the dark color stickies are relatively small.
  • the size of the particles (average area of the stickies) is remarkably small.
  • most of the granulated gummy stream flows to the long fiber pulp line, leaving only a small portion of the fluff pulp line.
  • some of the stickies are removed from the slurry. After heat dispersion, the amount of stickies is significantly reduced and the size is also significantly reduced.
  • the method of the present invention is applied to monitor the relative amount and removal rate of the stickies in each major stage of the papermaking process, and to monitor the distribution and removal rate of the stickies of the paper machine by adding the stick control agent in the papermaking process. Impact.
  • the test was carried out on the second paper of a paper mill in South China.
  • the paper machine uses 0CC as raw material, and the daily output is about 650 tons of corrugated. Paper.
  • the main stages of the paper machine pulp and preparation process include: pulper, high concentration cleaner, unloading tower, coarse screening machine, multi-plate concentrator, disc grinding machine, pre-cutting tank, pressure screen, headbox , and many more.
  • the glue control agent used in the test was to increase the cleansing enzyme TMSC-3588 [Products of Ruichenxing Biotechnology (Guangzhou) Co., Ltd.]. During the test, samples were taken from the following locations of the paper machine every day (except the second day): pulper outlet, coarse sieve outlet, fine sieved fine pulp, milled disc outlet, headbox.
  • the specific test method is as follows: Firstly, the pulp is passed through a 200 mesh sieve, the fiber and white water are separated, and then the fiber and the white water are re-mixed to prepare a pulp having a concentration of 4%, and then 500 g of the pulp is taken at 35 ° C. Under the adsorption reaction experiment.
  • the "Ming Ting" transparent sealing tape (purchased from: Wal-mart shop, the support layer is polypropylene film, and the adsorption layer is polyacrylate adhesive) is used as the adsorption test piece. The adsorption reaction time was 10 minutes.
  • the image acquisition settings are: Black and white two-color background consists of black and white plastic sheets, the color mode is black and white, the image area is 2500 X 2400 pixels, and the image resolution is 1200dpi.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Paper (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

一种监测制浆造纸系统中胶粘物(410、420)分布情况的方法,属于制浆造纸技术领域。该方法包括以下步骤:取样:使制浆造纸系统中预定取样点的造纸浆液流经表面能够吸附颗粒状的胶粘物(410、420)的吸附试件(200),与该吸附试件(200)发生吸附反应,让造纸浆液中的颗粒状的胶粘物(410、420)吸附在该吸附试件(200)表面;所述吸附试件(200)由允许可见光透过的透明材料制得;检测:获取上述吸附试件(200)在至少两种预设背景颜色条件下的图像;分析各图像中颗粒的各项性质,计算得到颗粒状的胶粘物(410、420)在该取样点的含量,从而得到胶粘物(410、420)在所述制浆造纸系统中的分布情况。采用上述方法,能够测定制浆造纸系统中各种颜色的胶粘物(410、420),提高监测胶粘物(410、420)的精度和灵敏度,且能够提供胶粘物(410、420)在整个系统的分布情况。

Description

监测制漿造纸系统中胶粘物分布情况的方法
技术领域
本发明涉及制浆造纸技术领域, 特别是涉及一种监测制浆造纸系统中胶粘物分布情况 的方法。 背景技术
胶粘物沉积是影响制浆造纸过程产率和产品质量最重要的因素之一。 这些胶粘物主要 来自三个方面: 一是造纸纤维中本来就存在的亲脂性物质, 如脂肪酸、树脂酸、 脂肪酸酯、 醇和 醇酯等; 二是以废纸造纸时, 废纸本身引入的涂布粘合剂、 印刷油墨、 热熔胶、 压敏胶等物质; 三是制浆造纸过程中添加的某些化学药品, 如增强剂、 施胶剂、 消泡剂和 填料等。
当胶粘物沉积在成形网上, 会堵塞网孔, 造成滤水困难, 增加停机清洗时间等问题; 如果沉积在压榨毛布和压辊上, 会缩短毛布使用寿命, 并影响纸页滤水; 如果胶粘物粘附 在烘缸表面, 会造成纸页断头或者形成纸洞、 纸孔; 如果胶粘物残留在纸页中, 会形成污 点, 增加纸病; 如果胶粘物聚集在白水中, 成为 "阴离子垃圾", 影响阳离子型助剂的使 用效果, 阻碍白水的循环回用。
因此, 制浆造纸工业应用各种方法来控制胶粘物所带来的不良影响。 这些方法主要有 机械法和化学法, 此外还有生化法等。 其中, 机械法是应用过筛、 除渣、 洗涤、 浮选等工 艺将胶粘物颗粒从造纸浆料中分离出来; 或者应用揉搓、 分散等工艺来减小胶粘物颗粒的 粒径, 从而减低胶粘物的危害性。 化学法是在造纸浆料里加入分散剂、 定着剂、 脱粘剂、 吸附剂等不同功能的化学试剂, 以降低胶粘物的危害性; 或者直接把清洗剂或者保洁剂应 用于制浆造纸设备的表面, 如成形网、 压榨毛毯、 烘缸和干网等等, 以清除沉积在这些设 备表面的胶粘物, 或者阻止胶粘物在这些设备的表面上沉积。 生化法是用生物酶取代化学 品来降解或者钝化胶粘物中的某些主要成份, 从而削弱胶粘物的危害性。 比如, 用脂肪水 解酶可以降解胶粘物中的脂肪酸酯, 用聚酯水解酶可以水解胶粘物中的聚醋酸乙烯酯, 而 用酰胺酶可以水解胶粘物中的聚酰胺热熔胶。
制浆造纸系统中的胶粘物根据它们的颗粒尺寸可分为两大类: 尺寸 >0. 10mm 或 者〉 0. 15讓 的为大胶粘物 (macrostickies ) , 反之, 小于这个尺寸的为微细胶粘物 (microstickies ) o 而根据胶粘物生成方式, 又可以分为原生胶粘物 (primarystickies ) 和次生胶粘物 (secondary stickies ) 0 原生胶粘物指那些直接从制浆造纸的原料中带来 的胶粘物; 而次生胶粘物则是分散的或者溶解的胶粘物重新聚集或者与造纸浆料中的其他 组份 (如施胶剂、 增强剂、 助留助滤剂、 消泡剂等造纸助剂) 结合而形成的。 大胶粘物一 般情况下可以用过筛和除渣等方法除去, 微细胶粘物除了可以用洗涤的方法去除掉一部分 外, 往往还需要用化学法或者生化法来控制它们的危害性。
监测制浆造纸系统中的胶粘物对于控制胶粘物的危害十分必要。 M. R. Doshi 在 " A Review of Stickies Measurement Methods " [Progress in Paper Recycl ing, Vol. 18 (3) , 2009, 20-30]—文中综述了各种不同的测试方法。 目前被广泛接受和认可方法有: 美国制 浆造纸协会 ( TAPPI )的方法 T277 om-07 (Macro stickies content in pulp : the "pick-up " method ) 国际脱墨工业协会 ( International Association of Deinking Industry ) 的 方法 Ingede Method 4 (Analysis of Macrostickies in Pulps ), 以及国际标准 15360-2 ( Recycled Pulp-Estimation of Stickies and Plastics-Part 2: Image Analysis Method)。 这些方法是将含有胶粘物的纸浆通过筛缝为 0. 1mm或者 0. 15mm的条缝筛, 使大 胶粘物颗粒与纸浆的纤维分开, 并把分离出来的大胶粘物颗粒过滤在黑色的滤纸上。 然后 使胶粘物覆盖上白色的涂层, 再用扫描仪扫描胶粘物的图像。 最后对扫描图像中的胶粘物 颗粒进行计数和测量。 这些方法最大的局限性是, 它们只限于能检测粒径 >0. lmm 或 者〉 0. 15mm 的大胶粘物颗粒, 对于粒径小于这一尺寸的微小胶粘物颗粒就不在这个方法的 测定范围之内。此外,这个方法在扫描大胶粘物图像时先把所有胶粘物颗粒转化成白色的, 因而无法区别不同颜色的胶粘物颗粒。 还有, 这些方法用机械筛的装置来分离造纸浆料中 的胶粘物颗粒, 具有效率低, 设备笨重, 不利于携带的问题。
美国专利号 US9280726 讲述了一种纸浆 /白水中大胶粘物在线分析器和方法。 根据这 一方法, 首先用一个浆料分类器把纸浆 /白水中的大胶粘物颗粒分离出来, 然后把胶粘物 颗粒悬浮液在水中, 并用照相机拍摄悬浮在水中的胶粘物颗粒图像, 最后用计算机软件分 析图像中胶粘物颗粒的数量和总量。 这个方法也是只限于测定大胶粘物, 而不能测定微细 胶粘物。 而且, 这一方法也是用机械装置来分离造纸浆料中的胶粘物颗粒, 具有设备笨重 和昂贵的缺点。
美国专利号 US8160305 (中国专利号 CN101910515B) 讲述了一种用于测量制浆造纸 浆料中颗粒胶粘物测定的方法和装置。 根据这一方法, 首先, 将一片基质插入到造纸浆料 中一定时间后, 取出基质, 用成像系统捕捉沉淀在基质上的颗粒胶粘物图像, 然后对图像 中的颗粒进行计数和测量, 最后在浆料中加入抑制剂处理胶粘物。 这一方法使用的成像系 统包括光学扫描仪、数字或胶片摄像机、或者与反射显微镜配合使用的数字或胶片摄像机。 但是, 这一方法不涉及如何区分造纸浆料中不同颜色的污染物颗粒。 并且, 这一方法还有 一个明显的缺陷: 使用 "插入" 的方式使基质悬挂在纸浆里, 基质难于经受住纸浆流动所 产生的较大的剪切力。 比如, 根据这一专利的描述, 基质是插在的样品室 (sampl ing chamber ) 的中间部分。 为了减少浆液的流动时对基质的冲击, 基质在的样品室里不得不 采取与浆液流向平行的取向。 这种取向不利于基质与浆样的充分接触, 影响了基质捕捉胶 粘物的效率。
Suva j it Das等人在《Real_time in-l ine measurement of stickies in recycled pulp》 (PEERS 2014, Tacoma, Washington) 一文中描述了一种在线实时测量回收纸浆胶粘物的 方法和装置。 这一方法是让造纸浆液通过一个观察池, 同时用高速数字相机拍摄造纸浆液 的图像, 然后用专门的计算机软件来分析造纸浆液图像, 从而检测出造纸浆液中的胶粘物 颗粒。 这一方法需要依赖复杂的计算机处理软件来分辨造纸浆液图像中的异物是胶粘物还 是气泡或者其它杂物, 而且这种专用的计算机软件需要经过人工的"培训"。美国专利(申 请号 US20140293040 ) 也讲述了一种与此类似的方法和装置, 所不同的是, 这一方法可以 只拍摄沉积在观察池窗口上的颗粒的图像,而不是造纸浆液的图像。美国专利号 US7842165 (中国专利号 CN101802605B) 描述了一种用石英晶体微量天平 (QCM) 来测定造纸工业过 程中胶粘物的沉积速率。 根据这一方法, 用一种不溶胀的环氧树脂或者含硅聚合物作为传 感器的表面涂层, 可以提高传感器感应胶粘物的灵敏度。
但是, 总的来说, 迄今为止, 在所有的胶粘物测定方法中, 不论是基于何种原理, 几 乎没有一种方法可以用作日常的检测方法来监测胶粘物在整个制浆造纸系统中的分布情 况。 这是因为这些方法或者由于所用的仪器设备太笨重或者太昂贵, 或者由于分析程序太 繁琐或者太费时。 然而, 为了更有效地控制制浆造纸过程中胶粘物的危害, 单单分析个别 样品胶粘物的含量, 或者单单观察制浆造纸系统中个别点的胶粘物变化情况, 这是远远不 够的。
因此, 十分有必要发明一种方法, 可以随时和有效的监测一个制浆造纸系统中胶粘物 的分布情况。 因为, 一旦了解胶粘物在整个制浆造纸系统中的分布情况, 不但对胶粘物在 系统中的来龙去脉可以一目了然, 还可以确定系统中各个环节去除胶粘物的效率。 这些信 息对于制定经济和有效的胶粘物控制方案是必不可少的。
而为了测定一个制浆造纸系统中胶粘物的分布情况, 测定方法应具备如下的特点: 首 先, 测定的范围要广, 测定的胶粘物应当包括大胶粘物和微细胶粘物; 其次, 分析步骤应 当尽量简单、 快速和效率高, 避免使用化学提取或者机械分离这些繁琐和笨拙的方法来分 离纸浆中的胶粘物, 以便在较短的时间内迅速给出整个制浆造纸系统各个观察点的胶粘物 相对含量; 还有, 这个方法分析数据除了要可靠、 重现性好之外, 还应与纸机上胶粘物的 危害程度有较紧密的相关性。 发明内容
基于此,有必要针对上述问题,提供一种监测制浆造纸系统中胶粘物分布情况的方法, 采用该方法, 能够测定制浆造纸系统中包括大胶粘物和微细胶粘物等的各种胶粘物, 达到 广泛监测的目的。
一种监测制浆造纸系统中胶粘物分布情况的方法, 包括以下步骤:
取样: 使制浆造纸系统中预定取样点的造纸浆液流经表面能够吸附颗粒状的胶粘物的 吸附试件, 与该吸附试件发生吸附反应, 让造纸浆液中的颗粒状的胶粘物吸附在该吸附试 件表面; 所述吸附试件由允许可见光透过的透明材料制得;
检测: 获取上述吸附试件在至少两种预设背景颜色条件下的图像; 分析各图像中颗粒 的各项性质, 计算得到颗粒状的胶粘物在所述预定取样点的含量, 从而得到胶粘物在所述 制浆造纸系统中的分布情况。
本发明人在研究中注意到, 造纸浆液中的胶粘物往往不是单一的颜色, 而是五颜六色 的。 这些不同颜色的颗粒状的胶粘物往往是由于它们来源不同和性质不同造成的。 如果只 用单个背景来获取颗粒状的胶粘物的图像, 可能会损失掉那部分与背景颜色相似的颗粒状 的胶粘物。 比如, 如果只用黑色的背景来扫描颗粒状的胶粘物图像, 黑色或者深颜色的颗 粒可能就无法显现出来; 反之, 如果只用白色的背景来扫描颗粒状的胶粘物, 白色或者浅 颜色的颗粒可能就会损失掉。
因此, 在上述研究基础上, 上述监测制浆造纸系统中胶粘物分布情况的方法, 选用透 明的吸附试件吸附造纸浆液中的颗粒状的胶粘物, 随后获取上述透明的吸附试件在至少两 种预设背景颜色条件下的图像, 能够提高的监测胶粘物的精度和灵敏度。 如分别用黑色和 白色的背景扫描颗粒状的胶粘物图像, 就可以把浅色和深色两部分的颗粒状的胶粘物都包 括进来。 因此, 上述方法通过获取颗粒状的胶粘物在不同颜色背景下的图像, 能够测定制 浆造纸系统中各种胶粘物, 具有监测效果好的优点。
在其中一个实施例中, 所述吸附试件为薄膜状或薄片状, 该吸附试件包括支撑层和涂 覆于该支撑层表面的吸附层。 薄膜或薄片形式的吸附试件, 便于在不同颜色的背景下获取 图像。
在其中一个实施例中, 所述支撑层选自: 无色透明的聚甲基丙烯酸甲酯层、 聚碳酸酯 层、 聚对苯二甲酸乙二醇脂层、 聚苯乙烯层、 聚氯乙烯层、 聚丙烯层和聚乙烯层中的至少 一种; 所述吸附层选自: 聚丙烯酸酯层、 丁苯胶乳层、 聚醋酸乙烯酯层、 聚丁二烯层、 聚 异戊二烯层、 乙烯乙酸乙烯酯层、 环氧丙烯酸酯层、 苯乙烯丙烯酸层、 聚乙烯醇层、 天然 橡胶层、 树脂酸层、 脂肪酸酯层、 萜烯树脂层、 动物蜡层、 植物蜡层和石蜡层中的至少一 种。
上述透明高分子材料制成的支撑层, 具有透光性好和机械强度高的特点。 上述吸附层 对于造纸浆液里的胶粘物有特别的亲合力, 能够从浆液里迅速地吸附颗粒状的胶粘物。
在其中一个实施例中, 如所述制浆造纸系统是以回收瓦楞箱纸(即 0CC)为主要原料, 则所述吸附层选自: 聚丙烯酸酯层、 聚醋酸乙烯酯层、和乙烯乙酸乙烯酯层中的至少一种; 如所述制浆造纸系统是以回收杂志纸为主要原料, 则所述吸附层选自: 丁苯胶乳层、 聚醋酸乙烯酯层、 和乙烯乙酸乙烯酯层中的至少一种;
如所述制浆造纸系统是以混合回收办公废纸和 /或报纸为主要原料, 则所述吸附层选 自: 环氧丙烯酸酯层、 苯乙烯丙烯酸层、 和聚丙烯酸酯层中的至少一种;
如所述制浆造纸系统是以化学浆、 机械浆和 /或化学机械浆为主要原料, 则所述吸附 层选自: 树脂酸层、 脂肪酸酯层、 和萜烯树脂层中的至少一种。
吸附试件对颗粒状的胶粘物的吸附力主要取决于胶粘物和吸附层各自的化学成份。 根据相似相溶的原理, 如果胶粘物和吸附层有类似的化学成份, 或者说, 它们的化学成份 有类似的性质, 那么, 吸附试件对颗粒状的胶粘物的吸附力就强。 因此, 按照上述设置, 选用与制浆造纸系统中所要监测的颗粒状的胶粘物有较好吸附能力的吸附层材料, 具有较 好的吸附效果。
在其中一个实施例中, 所述取样步骤中, 使造纸浆液与所述吸附试件表面呈 45-90 度的角度流向所述吸附试件。 本发明人发现, 常规技术中, 通常为了减少造纸浆液的流动 对取样设备的冲击, 不得不采取取样设备与造纸浆液流向平行的取向, 但是, 这种取向不 利于造纸浆液与取样设备的充分接触, 影响了取样设备对胶粘物的捕捉效率。 而使造纸浆 液与所述吸附试件表面以一定的角度流向所述吸附试件, 可以使造纸浆液与吸附试件充分 接触, 从而加速了颗粒状的胶粘物在吸附试件表面的吸附过程。
在其中一个实施例中, 所述取样步骤中, 所述吸附反应包括离线反应和 /或在线反应, 所述离线反应为: 取预定取样点的造纸浆液, 置于一预先安装了吸附试件的反应容器 内, 保持反应容器内的造纸浆液在流动状态下与所述吸附试件反应;
所述在线反应为: 从预定取样点引出一股造纸浆液支流, 并且维持所述造纸浆液流经 吸附试件表面, 使其发生吸附反应。
在离线反应中, 例如可以机械搅拌、 振摇、 转动、 和 /或翻转的方式保持造纸浆液流 动。 可根据实际应用的需要, 灵活选择不同的方式取样。
在其中一个实施例中, 所述取样步骤中, 所述吸附反应的时间为 5秒 -4小时; 所述吸 附反应的温度为 1 °C -99 °C ; 所述吸附反应中以固体干重百分比计, 造纸浆液的浓度为 0. 05%-15%; 所述吸附试件可发生吸附反应的表面面积为 0. 25 cm2-600cm2。 采用上述条件, 具有较好的吸附效果, 能够促进颗粒状的胶粘物吸附于吸附试件表面。
在其中一个实施例中, 所述取样步骤中, 以胶粘物捕获装置捕捉造纸浆液中的颗粒状 的胶粘物, 所述胶粘物捕获装置包括反应容器和所述吸附试件, 所述反应容器包括用于容 纳造纸浆液的容纳腔体, 所述吸附试件的吸附表面位于所述容纳腔体内。 利用该胶粘物捕 获装置, 能够提高胶粘物捕捉效率, 并且该捕获装置结构简单、造价低廉, 而且操作简便。 因而可以同时使用多个这样的捕获装置来捕捉一个制浆造纸系统中多个取样点的造纸浆 液品里的胶粘物, 从而降低了日常监测制浆造纸系统胶粘物分布情况的成本和操作难度, 提高了监测的工作效率。
在其中一个实施例中, 所述检测步骤中, 所述至少两种预设背景颜色中至少有一种背 景颜色为与一种颗粒状的胶粘物颜色互补的互补色。 分别利用不同颜色颗粒状的胶粘物的 互补色做背景来扫描图像, 可以显著改善扫描图像的质量, 提高扫描的分辨率。
在其中一个实施例中, 所述检测步骤中, 所述背景颜色至少包括白色和黑色。 白色和 黑色的背景颜色具有较好的通用性, 能够将浅色和深色的颗粒状的胶粘物在图像中明显的 突出, 从而改善扫描图像的质量, 提高扫描的分辨率。
在其中一个实施例中, 所述检测步骤中, 分析图像中颗粒的圆度和 /或长径比, 去除 圆度小于 0. 1和 /或长径比大于 10的造纸纤维, 计算得到颗粒状的胶粘物的含量。 本发明 人在研究中发现, 吸附试件也会吸附一些不属于胶粘物的颗粒, 比如, 最常见的非胶粘物 颗粒是纤维或者细小纤维。 这些物体之所以会吸附在吸附试件的表面, 说明它们的表面也 或多或少带有胶粘物杂质。 因此, 有时也把这些物体当成是胶粘物组成的一部分。 不过, 有时也需要将它们从检测到的颗粒中除去。 如果需要除去这些物体的颗粒, 可以应用图像 处理系统根据选定的参数来过滤颗粒图像。 由于与颗粒状的胶粘物相比, 这些纤维和细小 纤维颗粒通常有比较小的圆度和比较大的颗粒长径比, 因此, 可通过上述方法判断, 去除 图像中的造纸纤维, 以提高计算得到颗粒状胶粘物含量的准确性。
在其中一个实施例中, 所述检测步骤中, 以图像采集装置获取吸附试件在预设背景颜 色条件下的图像, 所述图像采集装置包括图像采集器和背景平台, 所述图像采集器用于采 集上述吸附试件的图像, 所述背景平台用于配合所述吸附试件, 该背景平台包括至少两种 所述预设背景颜色的背景面, 且至少两个所述背景面可相互切换。 以上述可切换背景面颜 色的图像采集装置获取吸附试件在不同背景颜色条件下的图像, 例如将吸附试件放置在背 景平台上, 图像采集装置由吸附试件上方获取图像, 或者以背景平台覆盖吸附试件, 而图 像采集装置由吸附试件下方获取图像。 以能够切换背景颜色的设备配合采集图像, 具有方 便、 快捷和操作简单的优点。
在其中一个实施例中, 所述检测步骤中, 分析图像中颗粒的各项性质, 分析过程包括 预处理、 图像测量和分类步骤;
所述预处理步骤包括: 亮度补正、 颜色提取、 对比度转换、 边缘增强、 二值化处理中 的至少一种;
所述图像测量步骤包括: 颗粒定位、 斑点确定、 边缘确定、 面积测量、 点-点距离测 量、 点-边距离测量、 边-边距离测量、 圆直径测量、 角度测量、 圆度测量、 和长宽比测量 中的至少一种;
所述分类步骤中, 通过颗粒尺寸、 颗粒圆度、 和 /或颗粒长径比进行分类。
所述图像处理系统可选用 PC Based系统, PLC系统, 或者嵌入式系统等, 并通过上 述步骤和方式对不同背景颜色下胶粘物的图像进行分析, 具有较好的分析效果。
在其中一个实施例中, 所述检测步骤中, 所述颗粒的各项性质包括: 颗粒总数、 各个 颗粒的面积、 各个颗粒的圆直径、 各个颗粒圆度、 各个颗粒长度、 各个颗粒宽度、 各个颗 粒长径比、 颗粒总面积、 颗粒平均面积、 颗粒平均圆直径、 颗粒平均长度、 颗粒平均宽度、 颗粒平均圆度、 颗粒平均长径比、 颗粒的粒度分布、 颗粒圆度分布、 颗粒长度分布、 颗粒 长径比分布、 和颗粒总面积百分比中的至少一种。 以上述性质表征颗粒, 既能够很好的区 分颗粒状的胶粘物和非胶粘物颗粒, 又能为颗粒状的胶粘物进行分类、 分析提供数据。
与现有技术相比, 本发明具有以下有益效果:
本发明的一种监测制浆造纸系统中胶粘物分布情况的方法, 选用透明的吸附试件吸附 造纸浆液中的颗粒状的胶粘物, 随后获取上述透明的吸附试件在至少两种预设背景颜色条 件下的图像, 能够测定制浆造纸系统中各种颜色的胶粘物, 提高的监测胶粘物的精度和灵 敏度。
并且, 由于本发明的方法具有操作简单、 成本低、 可靠性高的优点, 与当前已有的各 种胶粘物测定方法不同, 本发明的方法所提供的不仅仅是制浆造纸系统中某个部位的胶粘 物情况, 而是能够提供胶粘物在整个系统的分布情况。 这样的信息不但可以帮助全面地了 解胶粘物在整个系统中的流向, 而且还可以帮助分析系统中各个主要环节去除胶粘物的效 率, 因而可以为有效地控制胶粘物的危害提供更有力的帮助。
尽管从理论上说, 当前现有的各种分析和测定胶粘物的方法也可以用于测定胶粘物在 整个制浆造纸系统中的分布情况, 但是, 这些方法或者由于所用的仪器设备太笨重或者太 昂贵, 或者由于分析程序太繁琐或者太费时, 在实际应用中, 几乎不可能把这些方法用作 日常的检测手段来随时地监测胶粘物在纸机造纸系统中的分布情况。
特别是, 该方法还克服了当前胶粘物分析和测定方法中存在的费时、 耗力和仪器笨重 或者昂贵的诸多缺点, 可使用胶粘物捕获装置离线或在线捕捉一个制浆造纸系统中多个取 样点的造纸浆液品里的胶粘物。 利用该胶粘物捕获装置, 能够提高胶粘物捕捉效率, 并且 该捕获装置结构简单、 造价低廉, 而且操作简便。 因而可以同时使用多个这样的捕获装置 来捕捉一个制浆造纸系统中多个取样点的造纸浆液品里的胶粘物, 从而降低了日常监测胶 粘物在制浆造纸系统胶粘物分布情况的成本和操作难度。 附图说明
图 1为本发明中用于离线反应的捕获装置结构示意图;
图 2为本发明中用于在线反应的捕获装置结构示意图;
图 3为本发明中底座可拆卸式的捕获装置结构示意图;
图 4为本发明中图像采集装置的结构示意图;
图 5为本发明中平板式背景平台的结构示意图;
图 6为本发明中圆盘式背景平台的结构示意图;
图 7为本发明中传送带式背景平台的结构示意图;
图 8为实施例 1中的颗粒状的胶粘物图像。
其中: 110.容纳腔体; 111.筒体; 112.底座; 120.进液管; 130.出液管; 140.搅拌器;
150.试件架; 151.上底座板; 152.下底座板; 160.密封圈; 200.吸附试件; 310.图像采集 器; 320.背景平台; 321.背景平板; 322.背景转盘; 323.转轴; 324.转动辊; 325.背景带; 329.背景面; 330.光源; 410.浅色颗粒状的胶粘物; 420.深色颗粒状的胶粘物。 具体实施方式
为了便于理解本发明, 下面将参照相关附图对本发明进行更全面的描述。 附图中给出 了本发明的较佳实施例。 但是, 本发明可以以许多不同的形式来实现, 并不限于本文所描 述的实施例。 相反地, 提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全 面。
需要说明的是, 当元件被称为 "固定于"另一个元件, 它可以直接在另一个元件上或 者也可以存在居中的元件。 当一个元件被认为是 "连通"另一个元件, 它可以是直接连通 到另一个元件或者可能同时存在居中元件。
除非另有定义, 本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术 人员通常理解的含义相同。 本文中在本发明的说明书中所使用的术语只是为了描述具体的 实施例的目的, 不是旨在于限制本发明。 本文所使用的术语 "和 /或"包括一个或多个相 关的所列项目的任意的和所有的组合。 一种监测制浆造纸系统中胶粘物分布情况的方法, 包括以下步骤:
取样: 使制浆造纸系统中预定取样点的造纸浆液流经表面能够吸附颗粒状的胶粘物的 吸附试件, 与该吸附试件发生吸附反应, 让造纸浆液中的颗粒状的胶粘物吸附在该吸附试 件表面; 所述吸附试件由允许可见光透过的透明材料制得;
检测: 获取上述吸附试件在至少两种预设背景颜色条件下的图像; 分析各图像中颗粒 的各项性质, 计算得到颗粒状的胶粘物在所述预定取样点的含量, 从而得到胶粘物在所述 制浆造纸系统中的分布情况。
适用于本发明的制浆过程包括但不限于: 各种化学浆、 各种机械浆和化学机械浆、 以 及各种废纸回收纸浆。 适用于本发明的造纸过程包括但不限于: 包装用纸、 箱纸板、 瓦楞 原纸、 生活用纸、 新闻纸、 未涂布印刷书写纸、 涂布印刷纸、 白纸板、 以及各种特种纸及 纸板。
本发明人在研究中注意到, 造纸浆液中的胶粘物往往不是单一的颜色, 而是五颜六色 的, 比如包括红色的, 蓝色的, 黄色的, 绿色的, 黑色的或者深颜色的, 白色的或者浅颜 色的等等。 这些不同颜色的颗粒状的胶粘物往往是由于它们来源不同和性质不同造成的。 如果只用单个背景来获取颗粒状的胶粘物的图像, 可能会损失掉部分与背景颜色相似的颗 粒状的胶粘物。 比如, 如果只用黑色的背景来扫描颗粒状的胶粘物图像, 黑色或者深颜色 的颗粒可能就无法显现出来; 反之, 如果只用白色的背景来扫描颗粒状的胶粘物, 白色或 者浅颜色的颗粒可能就会损失掉。
因此, 在上述研究基础上, 优选的, 所述吸附试件为允许可见光透过的透明薄膜。 选 用透明的吸附试件吸附造纸浆液中的颗粒状的胶粘物, 随后获取上述透明的吸附试件在至 少两种预设背景颜色条件下的图像, 能够提高的监测胶粘物的精度和灵敏度。 如分别用黑 色和白色的背景扫描颗粒状的胶粘物图像, 就可以把浅色和深色两部分的颗粒状的胶粘物 都包括进来。 因此, 本发明的方法通过获取颗粒状的胶粘物在不同颜色背景下的图像, 能 够测定制浆造纸系统中各种胶粘物, 具有监测效果好的优点。
本发明的监测制浆造纸系统中胶粘物分布情况的方法, 适用于各种颜色颗粒状的胶粘 物的监测, 比如包括红色的, 蓝色的, 黄色的, 绿色的, 黑色的或者深颜色的, 白色的或 者浅颜色的等等。 并且适用的颗粒状的胶粘物的尺寸包括粒度小于 0. 15mm或者 0. lmm的 微细颗粒状的胶粘物, 和粒度大于 0. lmm或者 0. 15mm的大颗粒状的胶粘物。
由于制浆造纸系统中的胶粘物没有固定的化学组成, 其化学成分因造纸原材料不同和 生产工艺不同而有很多的变化, 但本发明的方法也适用于监测绝大多数制浆造纸过程中所 遇到的颗粒状的胶粘物。 这些胶粘物来源包括但不限于下列物质: 压敏胶、 热熔胶、 各种 天然和合成胶黏剂、 涂布粘合剂、 残余油墨、 天然树脂、 造纸用的消泡剂、 施胶剂、 或者 增强剂, 以及这些物质与细小纤维和 /或者无机颗粒结合在一起的混合物。 其中的无机颗 粒进一步包括: 高岭土、 滑石粉、 膨润土、 碳酸钙、 二氧化钛、 或者合成硅酸盐等物质。
上述预定取样点为根据监测的目的和要求以及制浆造纸系统的工艺流程特点, 在系统 不同部位选择的数个取样点。 这里所述的制浆造纸系统包括从制浆阶段到纸页烘干部的各 个阶段。 有些系统制浆部分和造纸部分是分开的, 有的则是联在一起的, 均可适用于本发 明的方法。
上述取样点包括但不限于制浆造纸系统如下的部位:碎浆机出口、高浓和低浓除渣器、 粗筛和精筛机、 纤维分级筛、 纸浆浓缩机、 磨浆机、 热分散机、 漂白塔、 浮选脱墨设备、 气浮池、 卸料塔、 储浆塔、 成浆池、 冲浆槽、 压力筛、 成形网、 流浆箱。 本项发明所述的 浆液包括但不限于取自这些取样点的进料口、 出料口、 排渣口和 /或者这些取样点内部的 造纸浆液, 渣浆、 滤出液、 白水, 等等。
而具体取样点的确定首先取决于监测的目的和要求。 有的监测任务是要求监测整个制 浆造纸系统中胶粘物的分布情况, 有的只是为了监测某个制浆造纸阶段的运行效率或者胶 粘物去除率。 对于前者来说, 取样点要分布整个系统的各个主要环节, 而后者则只需要在 要监测的部位周围确定少数取样点就够了。
取样点的确定还取决于制浆造纸的工艺流程。 不同的制浆造纸系统的工艺流程有着相 当大差别。 比如同样是 0CC造纸系统, 有的从碎浆机到流浆箱, 中间包括许多阶段, 如纤 维分级筛、 多段精筛、 除渣、 浓缩机、 磨浆机、 热分散, 等等, 有的只经过简单的除渣和 粗筛。 显然, 如果要监测整个系统胶粘物的分布情况, 前者的取样点要比后者多。
应用本发明的监测方法来监测一个制浆造纸系统中颗粒状的胶粘物的分布情况时, 当 确定了取样点之后, 下一步是用吸附的方法将每一个取样点的浆液中的颗粒状的胶粘物分 离出来。
为了达到吸附颗粒状的胶粘物的目的, 吸附试件仅需具有能够吸附颗粒状的胶粘物的 表面即可, 其形状、 大小可根据具体要求设计。 但是, 考虑到实操中的便利性和可行性, 优选的, 所述吸附试件为薄膜状或薄片状, 该吸附试件包括支撑层和涂覆于该支撑层表面 的吸附层。 更优选的, 所述支撑层选自: 无色透明的聚甲基丙烯酸甲酯 (PMMA) 层、 聚碳 酸酯 (PC)层、 聚对苯二甲酸乙二醇脂 (PET)层、 聚苯乙烯层 (PS)层、 聚氯乙烯 (PVC) 层、 聚丙烯 (PP)层和聚乙烯 (PE)层中的至少一种, 所述吸附层选自: 聚丙烯酸酯 (PA) 层、丁苯胶乳(SBR)层、聚醋酸乙烯酯(PVAc )层、聚丁二烯(PBD)层、聚异戊二烯(PIP) 层、 乙烯乙酸乙烯酯 (EVA) 层、 环氧丙烯酸酯 (EA) 层、 苯乙烯丙烯酸 (PSAA) 层、 聚 乙烯醇 (PVA) 层、 天然橡胶层、 树脂酸层、 脂肪酸酯层、 萜烯树脂层、 动物蜡层、 植物 蜡层、 和石蜡层中的至少一种。
上述透明高分子材料制成的支撑层, 具有透光性好和机械强度高的特点。 上述吸附层 对于造纸浆液里的胶粘物有特别的亲合力, 能够从浆液里迅速地吸附颗粒状的胶粘物。
上述包括支撑层和吸附层的吸附试件可通过多种方法制备得到, 将吸附层材料涂抹在 支撑层时, 可采用溶剂涂布、 乳胶涂布、 或者热熔胶涂布的方法。 其中, 溶剂涂布法是将 吸附层材料溶解在有机溶剂中, 然后将所得到的溶液均匀地涂抹在支撑层表面。 待溶剂挥 发以后, 进一步裁成所需的尺寸, 便做成了一个吸附试件。 乳胶涂布法是将吸附层材料乳 化在水里, 然后将所得到的乳液涂抹在支撑层表面, 干燥之后, 便可做成吸附试件。 热熔 涂布法是在没有水或者有机溶剂参与的情况下, 将吸附层材料加热升温, 使之成为具有一 定流动性的液体, 然后再将此熔融的液体涂抹在支撑层的表面, 随即冷却, 使涂层凝固。 合适的吸附层厚度可选择 l ffl-lOO ffl范围之间, 更为合适的吸附层厚度在 5 ffl-50 ffl之间。
根据本发明的要求, 所述吸附试件往往还可以用市场现有的各种胶带或胶膜产品来替 代。 这是因为这些产品大多具备了本发明所描述的吸附试件的基本特征。 这些特征包括合 适的支撑层和吸附层。 许多这类产品的支撑层 (即支持介质) 是用无色透明的高分子材料 制成的, 厚度通常在 0. 05mm至 0. 5mm范围之间, 宽度从数毫米至一米以上, 长度可达几 十米, 甚至上百米。 而且, 这些产品的吸附层 (即粘性涂层) 往往含有本发明中吸附层所 需要的成份。 合适的产品包括但不限于: B0PP胶带, PE胶带, PET胶带, 0PP胶带, PVC 胶带等等。
一般来说, 吸附试件对颗粒状的胶粘物的吸附力主要取决于胶粘物和吸附层各自的化 学成份。 根据相似相溶的原理, 如果胶粘物和吸附层有类似的化学成份, 或者说, 它们的 化学成份有类似的性质, 那么, 吸附试件对颗粒状的胶粘物的吸附力就强。
因此, 优选的, 如所述制浆造纸系统是以回收瓦楞箱纸(即 0CC)为主要原料, 则所述 吸附层选自: 聚丙烯酸酯层、 聚醋酸乙烯酯层、 和乙烯乙酸乙烯酯层中的至少一种;
如所述制浆造纸系统是以回收杂志纸为主要原料, 则所述吸附层选自: 丁苯胶乳层、 聚醋酸乙烯酯层、 和乙烯乙酸乙烯酯层中的至少一种;
如所述制浆造纸系统是以混合回收办公废纸和 /或报纸为主要原料, 则所述吸附层选 自: 环氧丙烯酸酯层、 苯乙烯丙烯酸层、 和聚丙烯酸酯层中的至少一种;
如所述制浆造纸系统是以化学浆、 机械浆和 /或化学机械浆为主要原料, 则所述吸附 层选自: 树脂酸层、 脂肪酸酯层、 和萜烯树脂层中的至少一种。
按照上述设置, 选用对制浆造纸系统中所要监测的颗粒状的胶粘物有较好吸附能力的 吸附层材料, 具有较好的吸附效果。
可以理解的, 在取样步骤中, 仅需使造纸浆液流经所述吸附试件表面, 即可将颗粒状 的胶粘物吸附, 而常规技术中, 通常为了减少造纸浆液的流动对取样设备的冲击, 不得不 采用取样设备与造纸浆液流向平行的取向。 但是, 这种取向不利于造纸浆液与取样设备的 充分接触, 影响了取样设备对胶粘物的捕捉效率。 优选的, 使造纸浆液与所述吸附试件表 面呈 45-90度的角度流向所述吸附试件, 可以使造纸浆液与吸附试件充分接触, 从而加速 了颗粒状的胶粘物在吸附试件表面的吸附过程。
对于如何取样, 可根据监测目的和要求设置, 仅需达到使足够量的造纸浆液流经吸附 试件, 使取样具有代表性即可。
例如, 可采用如下胶粘物捕获装置, 该胶粘物捕获装置包括反应容器和吸附试件, 所 述反应容器包括用于容纳造纸浆液的容纳腔体, 所述吸附试件的吸附表面位于所述容纳腔 体内。 可以理解的, 使用该胶粘物捕获装置时, 还需要一些必要的外围辅助设备; 这些外 围设备包括但不限于: 必要的管道、 管道接口、 管道阀门、 流体泵、 流量计、 机械搅拌设 备或者振摇设备等等。
利用该胶粘物捕获装置, 能够提高胶粘物捕捉效率, 并且该捕获装置结构简单、 造价 低廉, 而且操作简便。 因而可以同时使用多个这样的捕获装置来捕捉一个制浆造纸系统中 多个取样点的造纸浆液品里的胶粘物, 从而降低了日常监测制浆造纸系统胶粘物分布情况 的成本和操作难度。
对于容纳造纸浆液的容纳腔体的体积, 可以理解的, 如采用离线反应的方式, 需要较 大的容纳腔体以保证取样的代表性, 如采用在线反应的方式, 则相对来说较小的容纳腔体 即可满足需求。 本发明中, 容纳腔体的体积选自 20ml-20000ml 的范围之间, 较为合适的 容纳腔体体积选自 50ml-5000ml的范围之间,更为合适的容纳腔体体积选自 100ml_2000ml 的范围之间。 且容纳腔体的形状选自圆柱形、 椭圆柱形、 正方柱形、 长方柱形、 或者任何 合适的几何形状均可, 较为合适的容纳腔体形状选自圆柱形或者正方柱形。 制作该容纳腔 体的材料选自金属、 玻璃和 /或塑料, 较为合适的反应容器材料选自塑料。
可以理解的, 本发明使用的吸附试件可以安装在容纳腔体内的任何位置, 只要吸附试 件有足够支撑, 能够经受来自各个方向浆液流动的冲击, 以保证在吸附反应时吸附试件的 吸附表面能与造纸浆液充分地接触即可, 但是, 比较合适的位置是把吸附试件安装在容纳 腔体的底部, 与容纳腔体的底部平行, 并且使吸附表面面向容纳腔体的内部, 这样可以保 证在吸附反应时造纸浆液与吸附试件的吸附层充分地接触, 提高胶粘物的吸附效率。
从实用的角度看, 吸附试件可直接安装在容纳腔体底部的一个开口下方。 此开口的形 状与吸附试件大体相同, 但尺寸略小一些。 为了增加吸附试件的机械承受力, 在吸附试件 下方可以再加一块支撑板。 安装吸附试件的另一种方法是: 先将吸附试件以一个框架固定 起来, 然后把带有吸附试件的框架安装在容纳腔体的底部。 用来固定吸附试件的框架的形 状与吸附试件大体相当, 外围尺寸比吸附试件略大, 但中间的开口比吸附试件略小。 优选 的框架应该有上下两片。 这样可以把吸附试件夹在两片框架之间。
而为了使颗粒状的胶粘物与吸附试件具有足够的吸附反应区域, 本发明所使用的吸附 试件的面积在 0. 25cm2-600cm2的范围之间, 较为合适的吸附试件面积选自 2 cm2至 100cm2d 的范围之间, 更为合适的吸附试件面积选自从 5 cm2至 50 cm2的范围之间。 吸附试件的形 状选自正方形、 长方形、 圆形、 椭圆形、 或者任何合适的几何形状均可。
对于取样方案, 包括离线反应和 /或在线反应,
所述离线反应为: 取预定取样点的造纸浆液, 置于一预先安装了吸附试件的反应容器 内, 保持反应容器内的造纸浆液在流动状态下与所述吸附试件反应。例如, 可以机械搅拌、 振摇、 转动、 和 /或翻转的方式保持造纸浆液流动。
以离线反应取样时, 可用图 1所示的胶粘物捕获装置取样, 该捕获装置包括反应容器 和吸附试件, 所述反应容器包括用于容纳造纸浆液的容纳腔体 110, 所述吸附试件 200的 吸附表面位于所述容纳腔体 110内。 所述反应容器还应包括用于促使容纳腔体 110内造纸 浆液保持流动的搅拌器 140。 具体为: 反应容器的容纳腔体 110是一个两头敞开的圆筒。 容纳腔体 110的底部由上、 下两片底座板组成。 上底座板 151与容纳腔体的底部相连, 并 且该上底座板 151的中间有开口, 上底座板 151的开口可以是圆形, 正方形, 长方形, 或 者其他形状; 其面积可以等于或小于反应容器的内横截面积。 下底座板 152则是通过固定 螺丝或者其它方法固定在上底座板 151的下方。 吸附试件 200被夹在上、 下两片底座板之 间, 并且它的吸附层面向反应容器内部。在吸附试件 200的上方配有一台桨式搅拌器 140, 并且搅拌轴与吸附试件表面垂直。 吸附反应时, 由于吸附层的化学吸引力和搅拌作用产生 的机械推动力的双重作用, 加速和加强了浆液里的颗粒状的胶粘物在吸附试件表面的吸 附, 因而提高了捕获颗粒状的胶粘物的效率。
所述在线反应为: 从预定取样点引出一股造纸浆液支流, 并且维持所述造纸浆液流经 吸附试件表面, 使其发生吸附反应。
以在线反应取样时, 可以用图 2所示的胶粘物捕获装置取样, 该捕获装置包括反应容 器和吸附试件, 所述反应容器包括用于容纳造纸浆液的容纳腔体 110, 所述吸附试件 200 的吸附表面位于所述容纳腔体 110内。 所述反应容器还包括进液管 120和出液管 130, 所 述容纳腔体 110为密闭容纳腔体, 其上设有进液口和出液口, 所述进液管 120与所述进液 口连通, 所述出液管 130与所述出液口连通, 所述进液口设于所述容纳腔体 110的上部, 例如顶部或者侧壁上方, 所述出液口设于所述容纳腔体 110的侧壁。 该反应容器的底部结 构与图 1所示的装置基本相同。 吸附反应时, 从制浆造纸系统中引出一股支流浆液经过进 料口流入吸附反应容器内, 与吸附层接触之后从出料口流出。 由于吸附层的化学吸引力和 浆液流动产生的机械推动力的双重作用, 加速和加强了浆液中颗粒状的胶粘物在吸附试件 表面的吸附, 因而提高了捕获颗粒状的胶粘物的效率。
为了便于安装吸附试件, 吸附反应容器的底部可以是敞开的或者有一个开口, 另外还 附有一个可装卸的底座。 例如, 所述容纳腔体包括筒状的筒体、 试件架和底座, 所述底座 可拆卸式的安装于所述筒体底部, 所述试件架通过所述底座夹紧固定于所述筒体和所述底 座之间, 所述试件架上设有用于固定吸附试件的吸附安装区域。 具体可如图 3所示, 该装 置的容纳腔体主要由圆筒状的筒体 111和圆盘状的底座组成 112。 使用时, 先将吸附试件 200安装在一个圆形的试件架 150上,然后把此试件架 150安装在容纳腔体的底座 112上, 再装上密封圈 160, 最后通过螺纹连接将筒体 111安装在底座 112上。 圆形试件架 150的 面积和形状与筒体 111底部外横截面相同, 但中间有一个开口。 开口的形状可以是圆形, 正方形, 长方形, 或者其他形状; 其面积略小于吸附试件, 以便吸附试件可以覆盖整个开 口。
可以理解的, 胶粘物与吸附试件发生吸附反应需要一定的反应时间, 合适的吸附反应 的反应时间选自 5秒 -4小时之间, 较为合适的吸附反应时间选自 10秒 -20分钟的范围之 间, 更为合适的吸附反应时间选自 20秒 -10分钟的范围之间。所需吸附反应时间的长短主 要取决于浆液的浓度和吸附反应的温度。 这里所说的浆液浓度是指浆液中固体干重百分含 量, 本发明中所述的纸浆浓度或浆液浓度等均是指浆液中固体干重百分含量。
而适合的造纸浆液浓度范围在 0. 05%-10%之间, 较为合适的浆液浓度范围是 0. 2%-5% 之间, 更加合适的浆液浓度范围是 0. 5%-4%之间。 浆液浓度太低时, 颗粒状的胶粘物的吸 附反应速率慢, 影响吸附效率; 反之, 如果浆液浓度太高, 浆液在反应容器里的流动性差, 也不利于颗粒状的胶粘物的吸附。 适合的吸附反应温度范围在 1°C-99°C之间, 较为合适的反应温度范围是 10°C-60°C之 间, 更加合适的反应温度范围是 20°C-50°C之间。 造纸浆液的温度太高或者太低都不利于 颗粒状的胶粘物在吸附试件表面的吸附。
在吸附反应结束后, 吸附了颗粒状的胶粘物的吸附试件经过适当的淋洗, 去除附着在 试件上的纤维和无关杂物, 并干燥后, 就可用于进一步的用途。
这些进一步的用途包括但不限于: 用图像采集和处理技术或者重量分析法来分析浆液 里胶粘物的相对含量; 用光学显微镜观察颗粒状的胶粘物的形态、 颜色、 大小等特征; 用 相应的化学分析技术, 如显微红外光谱仪和激光显微拉曼光谱仪, 来鉴定单个颗粒状的胶 粘物的化学组份; 或者, 作为制浆造纸生产过程的实物资料存档保管, 以便将来复査。
在本发明中, 以图像采集和处理技术来分析浆液里胶粘物的相对含量, 具体为获取上 述吸附试件在至少两种预设背景颜色条件下的图像; 并且进一步用图像处理系统来分析和 测量中颗粒状的胶粘物的数量和大小等性质。 最后, 列出各个取样点颗粒状的胶粘物的相 对含量, 从而得到胶粘物在所述制浆造纸系统中的分布情况。
可以理解的, 采用本发明的方法直接得到的是造纸浆液中胶粘物的相对含量, 而且是 胶粘物有害部分的相对含量,而不是全部胶粘物的相对含量。对于一个制浆造纸系统来说, 并非系统中的所有胶粘物都会对造纸生产过程造成危害。 比如, 当胶粘物经过胶粘物控制 剂处理之后, 其表面的化学性质发生了变化, 因而不再会沉积在纸机的表面对生产造成危 害。 所以, 从实用的角度看, 监测系统中的胶粘物全量意义并不大。 有效的监测方法应该 是集中在监测胶粘物中的有害部分, 也就是说, 集中监测对造纸生产过程会造成危害的那 部分胶粘物。 这对制浆造纸过程中的胶粘物控制才有意义。 本发明的方法正是如此。 本发 明的方法所检测的就是制浆造纸系统中有害胶粘物的部分。
对于背景颜色的选取, 优选采用与颗粒状的胶粘物颜色互补的互补色作为背景颜色, 可以显著改善扫描图像的质量,提高扫描的分辨率。或所述背景颜色至少包括白色和黑色。 白色和黑色的背景颜色具有较好的通用性, 能够将浅色和深色的颗粒状的胶粘物在图像中 明显的突出, 也能改善扫描图像的质量, 提高扫描的分辨率。
在分析和处理颗粒状的胶粘物的图像时, 还进一步包括对图像处理结果进行过滤, 除 去不属于颗粒状的胶粘物。 比如, 最常见的非胶粘物颗粒是纤维或者细小纤维。 这些物体 之所以会吸附在吸附试件的表面, 说明它们的表面也或多或少带有胶粘物杂质。 因此, 有 时也把这些物体当成是胶粘物组成的一部分。 不过, 有时也需要将它们从检测到的颗粒中 除去。 由于与颗粒状的胶粘物相比, 这些纤维和细小纤维颗粒通常有比较小的圆度和比较 大的颗粒长径比。 如果需要除去这些物体的颗粒, 可以应用图像处理系统根据选定的参数 来过滤颗粒图像。 如以图像处理系统判断, 去除圆度小于 0. 1和 /或长径比大于 10的造纸 纤维, 计算得到颗粒状的胶粘物的含量。
为了提高操作的简便性, 所述检测步骤中, 优选以图像采集装置获取吸附试件在预设 背景颜色条件下的图像, 所述图像采集装置包括图像采集器和背景平台, 所述图像采集器 用于采集上述吸附试件的图像, 所述背景平台用于配合所述吸附试件, 例如将吸附试件放 置在背景平台上, 图像采集装置由吸附试件上方获取图像,或者以背景平台覆盖吸附试件, 而图像采集装置由吸附试件下方获取图像。 该背景平台包括至少两种预设背景颜色的背景 面, 且至少两个所述背景面可相互切换。
上述图像采集装置还包括光源, 为所述图像采集器提供照明; 适合用于本发明图像采 集装置的光源包括但不限于: LED ( Light Emitting Diode, 发光二极管)、 荧光灯、 卤素 灯、 金属卤化物灯、 氙灯。 光源的照明方式可以是透射、 镜面反射或者是漫反射。
上述图像采集装置的结构及工作原理如图 4所示, 一个带有框形试件架 150的吸附试 件 200从造纸浆液中吸附了不同颜色胶的粘物颗粒 (浅色颗粒状的胶粘物 410和深色颗粒 状的胶粘物 420), 被放在一个有黑白两色的背景平台 320上。 由光源 330发出的光线照射 在吸附试件 200上, 由此产生漫反射和 /或镜面反射由图像采集器 310 (照相机)接受并形 成图像。
为了降低操作难度, 能够方便、 快捷的实现不同颜色背景的转换, 可采用专用的背景 平台。 例如, 所述背景平台可选自: 平板式背景平台, 圆盘式背景平台、 或传送带式背景 平台。
如图 4-5所示, 所述平板式背景平台包括可滑动的背景平板, 所述背景平板上设有至 少两种颜色的背景 329面。 背景平台有一滑动器 (末标出) 使背景平台能够沿着水平方向 来回滑动,变换背景的颜色。当固定于试件架 150上的吸附试件 200放置在该背景平台后, 对同一组颗粒状的胶粘物(浅色颗粒状的胶粘物 410和深色颗粒状的胶粘物 420), 分别产 生了以白色和黑色为背景的不同图像。
如图 6所示, 所述圆盘式背景平台包括背景转盘 322和转轴 323, 所述背景转盘 322 安装于所述转轴 323上, 并可围绕该转轴 323转动, 所述背景转盘 322上设有至少两种颜 色 (图中为四种) 的背景面 329; 通过电动的或者机械的方式驱动背景转盘 322 以转 323 轴为轴心转动一定的角度, 便可以变换背景的颜色, 对同一组颗粒状的胶粘物 (浅色颗粒 状的胶粘物 410和深色颗粒状的胶粘物 420),分别产生了以不同颜色背景面 329为背景的 不同图像。
如图 7所示, 所述传送带式背景平台包括转动辊 324和背景带 325, 所述背景带 325 可在转动辊 324的带动下围绕转动辊 324转动, 所述背景带 325上设有至少两种颜色的背 景面 329。 通过电动的或者机械的方式驱动两个转动辊 324中的其中一个转动, 由转动辊 带动多色背景带 325转动一定的距离, 使背景从一个颜色转换到另外一个颜色。 多色背景 带可以只配有黑和白两种颜色, 或者根据需要, 配置更多种的颜色, 使同一组颗粒状的胶 粘物(浅色颗粒状的胶粘物 410和深色颗粒状的胶粘物 420), 分别产生以不同颜色背景面 329为背景的不同图像。
适合用于本发明图像采集装置的图像采集器为摄像机, 该摄像机选自分辨率在 500像 素以上的黑白或者彩色线阵摄像机, 或者, 分辨率在 200, 000像素以上的黑白或者彩色面 线阵摄像机。 适合用于本发明的摄像机包括 CCD ( Charge Coupled Device, 电荷耦合元件) 摄像机和 CMOS ( Complementary Metal-Oxide Semiconductor, 互补金属氧化物半导体元 件) 摄像机。
采用上述装置和方法得到的颗粒状的胶粘物图像, 可以作为制浆造纸生产过程的图形 记录或者实验结果的图形资料保存起来。 这增加生产记录和实验结果的可靠性和可信度。
优选的,以图像处理系统分析图像中颗粒的各项性质,所述图像处理系统选自 PC Based 系统, PLC系统, 或者嵌入式系统。 分析过程包括预处理、 图像测量和分类步骤;
所述预处理步骤包括: 亮度补正、 颜色提取、 对比度转换、 边缘增强、 二值化处理中 的至少一种;
所述图像测量步骤包括: 颗粒定位、 斑点确定、 边缘确定、 面积测量、 点-点距离测 量、 点-边距离测量、 边-边距离测量、 圆直径测量、 角度测量、 圆度测量、 和长宽比测量 中的至少一种;
所述分类步骤中, 通过颗粒尺寸、 颗粒圆度、 和 /或颗粒长径比进行分类。
可以理解的, 还可根据需要, 在图像测量步骤之后, 通过分析颗粒圆度和 /或颗粒长 径比, 排除造纸纤维;
以上述图像处理系统分析图像中颗粒的各项性质,所述性质包括但不限于:颗粒总数、 各个颗粒的面积、 各个颗粒的圆直径、 各个颗粒圆度、 各个颗粒长度、 各个颗粒宽度、 各 个颗粒长径比、 颗粒总面积、 颗粒平均面积、 颗粒平均圆直径、 颗粒平均长度、 颗粒平均 宽度、 颗粒平均圆度、 颗粒平均长径比、 颗粒的粒度分布、 颗粒圆度分布、 颗粒长度分布、 颗粒长径比分布、 颗粒总面积百分比等等。 实施例 1
一、 实验条件。
1、 制备胶粘物捕获装置。
本实施例的胶粘物捕获装置包括反应容器和吸附试件, 所述反应容器包括用于容纳造 纸浆液的容纳腔体, 所述吸附试件固定于所述容纳腔体内。
考虑到吸附试件应具有一定的抗造纸浆液冲击强度, 还设有一对框形试件架, 该框形 试件架的外缘尺寸为 70mm X 70mm, 其中间的开口为 54mm X 40mm。
吸附试件包括支撑层和涂覆于该支撑层表面的吸附层, 如可利用透明的封箱胶带作为 吸附试件。
将透明封箱胶带作为吸附试件, 其宽度为 60mm或者 48mm。 取一段长度约为 60讓的透 明封箱带贴在其中一片试件架中间的开口上, 然后装上另外一片试件架, 使上、 下两片试 件架中间夹着胶带, 即将吸附试件安装至试件架上。
将上述安装了吸附试件的试件架安装在一个容积为 600ml 的反应容器的容纳腔体底 部, 即得胶粘物捕获装置。
2、 吸附试验。
把要测试的造纸浆液样品调到所需的浆浓, 并预热到所需的温度。 取 500ml上述造纸 浆液置于上述安装有吸附试件的反应容器 (即胶粘物捕获装置) 里。 然后, 用搅拌或者振 摇的方式保持反应一定时间。 吸附反应结束后, 除去反应容器内的造纸浆液, 取出吸附试 件, 用洗瓶轻轻淋洗掉附着在试件上的纤维和无关杂物。 待试件风干后, 供下一步的图像 采集使用。
3、 图像采集和分析。
把上述处理好的吸附试件插入图像采集装置的窗口内, 在适当的背景颜色、 光圈、 焦 距和必要的参数条件下, 采集试件的图像。 完成图像采集之后, 用图像分析软件 imagej 1. 49v测量图像中颗粒的数量和面积。 然后, 根据以下的公式来计算纸浆的胶粘物相对量 C-.
C = ^ IS^ (ppm)
其中: A是扫描图像里颗粒的总面积 (像素); A是吸附试件的扫描面积。
制浆造纸系统中各个取样点的胶粘物去除率 由以下公式计算:
其中: G和 G分别是碎浆机出口 (或者, 粗筛出口) 和取样点 的相对胶粘物浓度, i代表碎浆机出口 (或者, 粗筛出口) 以后的各个取样点。
分离筛或者除渣器的胶粘物分离率 :
Figure imgf000018_0001
此处, G和 G分别是渣浆和良浆的胶粘物相对浓度。 当 Ε=0时, 它意味着良浆和尾渣 的胶粘物浓度相同,也就是说,分离筛或者除渣器完全没有起到分离效果;相反,当 Ε=100% 时, 它意味着良浆的胶粘物浓度等于零, 也就是说, 胶粘物被完全从良浆中分离出来。
二、 实验方法。
本实施例中展示应用本发明的方法来测定胶粘物在一个造纸系统中的分布情况。
试验是在华中地区某纸厂的三号纸进行的。 该纸机用 0CC作原料, 日产约 1200吨牛 卡纸。 该纸机的芯层和底层生产线包括以下主要阶段: 碎浆机、 高浓除渣器、 卸浆塔、 粗 筛机、 分级筛; 在分级筛之后, 长纤浆线经过重质除渣器、 四段精筛、 多盘浓缩机、 热分 散机、 磨盘机、 长纤浆塔、 配浆池、 流浆箱; 短纤浆线经过重质除渣器、 多盘浓缩机、 长 纤浆塔、 配浆池、 流浆箱。 试验的取样点包括: 碎浆机出口、 粗筛良浆出口、 分级筛长纤 出口、 分级筛短纤出口、 精筛良浆出口、 精筛尾浆出口、 热分散机出口、 底层流浆箱、 芯 层流浆箱。
测试的具体做法如下: 先用造纸浆液过 200目网筛, 使纤维和白水分离, 然后再把纤 维和白水按比例重新混合配成浓度为 2% (以固体干重百分比计) 的浆液, 然后取其中 500 克浆液在 35°C下做吸附反应实验。 用 " Scotch Packaging Tape "透明封箱胶带 (购自: 美国 Costco 店, 支撑层为聚丙烯膜, 吸附层为聚丙烯酸酯粘结剂) 作为吸附试件。 吸附 反应时间为 10分钟。
图像采集的设置是:黑白双色背景分别由黑色和白色的塑料片组成,色彩模式为黑白, 图像区域为 2500 X 1800像素, 图像分辨率为 1200dpi。 用黑色背景扫描时, 阈值为 40, 得到的图像主要是白色或者浅色的颗粒状的胶粘物; 而用白色背景扫描时, 阈值为 128, 得到的图像主要是黑色或者暗色的颗粒状的胶粘物。
三、 实验结果。
以上述方法得到了如图 8所示的颗粒状的胶粘物图像, 分析这些图像所得到的结果如 下表所示。
表 1. 不同取样点颗粒状的胶粘物的分析结果
Figure imgf000019_0001
从这些结果可以看出, 该制浆造纸系统中的胶粘物以浅色的为主, 暗色的胶粘物相对 较少。 浆料经过粗筛之后, 颗粒的尺寸 (胶粘物平均面积) 明显变小。 经过分级筛之后, 大部分的颗粒状的胶粘物流向长纤浆线, 只有小部分留在短纤浆线。 经过长纤浆线的四段 精筛, 有部分胶粘物被从渣浆中排除。 再经过热分散之后, 胶粘物的数量显著减少, 尺寸 也显著变小。 实施例 2
一、 实验条件。
参照实施例 1。
二、 实验方法。
本实施例中展示应用本发明的方法来监测造纸过程各个主要阶段的胶粘物相对量和 去除率, 以及监测在造纸过程中加入胶粘物控制剂对纸机胶粘物分布情况和去除率的影 响。
试验是在华南地区某纸厂的二号纸进行的。 该纸机用 0CC作原料, 日产约 650吨瓦楞 纸。 该纸机制浆、 备浆过程的主要阶段包括: 碎浆机、 高浓除渣器、 卸浆塔、 粗筛机、 多 盘浓缩机、 磨盘机、 抄前池、 压力筛、 流浆箱, 等等。 试验时所用的胶粘物控制剂是增加 洁净酶™SC-3588 [瑞辰星生物技术(广州)有限公司产品]。试验期间, 每天(第二天除外) 从该纸机以下位置取样测试: 碎浆机出口、 粗筛出口、 精筛良浆、 磨盘出口、 流浆箱。
测试的具体做法如下: 先用纸浆过 200目网筛, 将纤维和白水分离, 然后再把纤维和 白水按比例重新混合配成浓度为 4%的纸浆, 然后取其中 500克纸浆在 35°C下做吸附反应 实验。 用 "明庭"透明封箱胶带 (购自: Wal-mart 店, 支撑层为聚丙烯膜, 吸附层为聚 丙烯酸酯粘结剂) 作为吸附试件。 吸附反应时间为 10分钟。
图像采集的设置是: 黑白双色背景分别由黑色和白色塑料片组成, 色彩模式为黑白, 图像区域为 2500 X 2400像素, 图像分辨率为 1200dpi
三、 实验结果。
以上述方法得到了颗粒状的胶粘物图像, 分析这些图像所得到的结果如下表所示。 表 2. 胶粘物相对量 (ppm) 和去除率
Figure imgf000020_0001
从该表的结果可以看出, 从碎浆机出口开始, 经粗筛、 精筛、 多盘浓缩 /磨盘等阶段 的分离和洗涤, 最后到达流浆箱, 胶粘物相对含量依次下降, 去除率依次提高。 而且, 自 从在纸机的碎浆机加入胶粘物控制剂洁净酶控后, 纸机各个观察点的胶粘物相对含量也随 之显著下降。 以上所述实施例的各技术特征可以进行任意的组合, 为使描述简洁, 未对上述实施例 中的各个技术特征所有可能的组合都进行描述, 然而, 只要这些技术特征的组合不存在矛 盾, 都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式, 其描述较为具体和详细, 但并不能 因此而理解为对发明专利范围的限制。 应当指出的是, 对于本领域的普通技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干变形和改进, 这些都属于本发明的保护范 围。 因此, 本发明专利的保护范围应以所附权利要求为准。

Claims

权利要求书
1、 一种监测制浆造纸系统中胶粘物分布情况的方法, 其特征在于, 包括以下步骤: 取样: 使制浆造纸系统中预定取样点的造纸浆液流经表面能够吸附颗粒状的胶粘物的 吸附试件, 与该吸附试件发生吸附反应, 让造纸浆液中的颗粒状的胶粘物吸附在该吸附试 件表面; 所述吸附试件由允许可见光透过的透明材料制得;
检测: 获取上述吸附试件在至少两种预设背景颜色条件下的图像; 分析各图像中颗粒 的各项性质, 计算得到颗粒状的胶粘物在所述预定取样点的含量, 从而得到胶粘物在所述 制浆造纸系统中的分布情况。
2、 根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法, 其特征在于, 所述吸附试件为薄膜状或薄片状, 该吸附试件包括支撑层和涂覆于该支撑层表面的吸附 层。
3、 根据权利要求 2所述的监测制浆造纸系统中胶粘物分布情况的方法, 其特征在于, 所述支撑层选自: 无色透明的聚甲基丙烯酸甲酯层、 聚碳酸酯层、 聚对苯二甲酸乙二醇脂 层、 聚苯乙烯层、 聚氯乙烯层、 聚丙烯层和聚乙烯层中的至少一种; 所述吸附层选自: 聚 丙烯酸酯层、 丁苯胶乳层、 聚醋酸乙烯酯层、 聚丁二烯层、 聚异戊二烯层、 乙烯乙酸乙烯 酯层、 环氧丙烯酸酯层、 苯乙烯丙烯酸层、 聚乙烯醇层、 天然橡胶层、 树脂酸层、 脂肪酸 酯层、 萜烯树脂层、 动物蜡层、 植物蜡层和石蜡层中的至少一种。
4、 根据权利要求 3所述的监测制浆造纸系统中胶粘物分布情况的方法, 其特征在于, 如所述制浆造纸系统是以回收瓦楞箱纸为主要原料, 则所述吸附层选自: 聚丙烯酸酯层、 聚醋酸乙烯酯层、 和乙烯乙酸乙烯酯层中的至少一种;
如所述制浆造纸系统是以回收杂志纸为主要原料, 则所述吸附层选自: 丁苯胶乳层、 聚醋酸乙烯酯层、 和乙烯乙酸乙烯酯层中的至少一种;
如所述制浆造纸系统是以混合回收办公废纸和 /或报纸为主要原料, 则所述吸附层选 自: 环氧丙烯酸酯层、 苯乙烯丙烯酸层、 和聚丙烯酸酯层中的至少一种;
如所述制浆造纸系统是以化学浆、 机械浆和 /或化学机械浆为主要原料, 则所述吸附 层选自: 树脂酸层、 脂肪酸酯层、 和萜烯树脂层中的至少一种。
5、根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法,其特征在于, 所述取样步骤中, 使造纸浆液与所述吸附试件表面呈 45-90度的角度流向所述吸附试件。
6、 根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法, 其特征在于, 所述取样步骤中, 所述吸附反应包括离线反应和 /或在线反应,
所述离线反应为: 取预定取样点的造纸浆液, 置于一预先安装了吸附试件的反应容器 内, 保持反应容器内的造纸浆液在流动状态下与所述吸附试件反应;
所述在线反应为: 从预定取样点引出一股造纸浆液支流, 并且维持所述造纸浆液流经 吸附试件表面, 使其发生吸附反应。
7、 根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法, 其特征在于, 所述取样步骤中, 所述吸附反应的时间为 5秒 -4小时; 所述吸附反应的温度为 rC-99°C ; 所述吸附反应中以固体干重百分比计, 造纸浆液的浓度为 0. 05%-15%; 所述吸附试件可发 生吸附反应的表面面积为 0. 25 cm2-600cm2
8、 根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法, 其特征在于, 所述取样步骤中, 以胶粘物捕获装置捕捉造纸浆液中的颗粒状的胶粘物, 所述胶粘物捕获 装置包括反应容器和所述吸附试件, 所述反应容器包括用于容纳造纸浆液的容纳腔体, 所 述吸附试件的吸附表面位于所述容纳腔体内。
9、 根据权利要求 1-8 任一项所述的监测制浆造纸系统中胶粘物分布情况的方法, 其 特征在于, 所述检测步骤中, 所述至少两种预设背景颜色中至少有一种背景颜色为与一种 颗粒状的胶粘物颜色互补的互补色。
10、 根据权利要求 1-8任一项所述的监测制浆造纸系统中胶粘物分布情况的方法, 其 特征在于, 所述检测步骤中, 所述背景颜色至少包括白色和黑色。
11、根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法,其特征在于, 所述检测步骤中, 分析图像中颗粒的圆度和 /或长径比, 去除圆度小于 0. 1和 /或长径比大 于 10的造纸纤维, 计算得到颗粒状的胶粘物的含量。
12、根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法,其特征在于, 所述检测步骤中, 以图像采集装置获取吸附试件在预设背景颜色条件下的图像, 所述图像 采集装置包括图像采集器和背景平台, 所述图像采集器用于采集上述吸附试件的图像, 所 述背景平台用于配合所述吸附试件, 该背景平台包括至少两种所述预设背景颜色的背景 面, 且至少两个所述背景面可相互切换。
13、根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法,其特征在于, 所述检测步骤中, 分析图像中颗粒的各项性质, 分析过程包括预处理、 图像测量和分类步 骤;
所述预处理步骤包括: 亮度补正、 颜色提取、 对比度转换、 边缘增强、 二值化处理中 的至少一种;
所述图像测量步骤包括: 颗粒定位、 斑点确定、 边缘确定、 面积测量、 点-点距离测 量、 点-边距离测量、 边-边距离测量、 圆直径测量、 角度测量、 圆度测量、 和长宽比测量 中的至少一种;
所述分类步骤中, 通过颗粒尺寸、 颗粒圆度、 和 /或颗粒长径比进行分类。
14、根据权利要求 1所述的监测制浆造纸系统中胶粘物分布情况的方法,其特征在于, 所述检测步骤中, 所述颗粒的各项性质包括: 颗粒总数、 各个颗粒的面积、 各个颗粒的圆 直径、 各个颗粒圆度、 各个颗粒长度、 各个颗粒宽度、 各个颗粒长径比、 颗粒总面积、 颗 粒平均面积、 颗粒平均圆直径、 颗粒平均长度、 颗粒平均宽度、 颗粒平均圆度、 颗粒平均 长径比、 颗粒的粒度分布、 颗粒圆度分布、 颗粒长度分布、 颗粒长径比分布、 和颗粒总面 积百分比中的至少一种。
PCT/CN2016/092390 2016-06-06 2016-07-29 监测制浆造纸系统中胶粘物分布情况的方法 WO2017210975A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610395180.7 2016-06-06
CN201610395180.7A CN106053301B (zh) 2016-06-06 2016-06-06 监测制浆造纸系统中胶粘物分布情况的方法

Publications (1)

Publication Number Publication Date
WO2017210975A1 true WO2017210975A1 (zh) 2017-12-14

Family

ID=57170312

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/092390 WO2017210975A1 (zh) 2016-06-06 2016-07-29 监测制浆造纸系统中胶粘物分布情况的方法

Country Status (2)

Country Link
CN (1) CN106053301B (zh)
WO (1) WO2017210975A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105869180A (zh) * 2016-06-06 2016-08-17 瑞辰星生物技术(广州)有限公司 造纸浆液中颗粒状胶粘物的图像获取系统和方法
CN109610217A (zh) * 2016-10-19 2019-04-12 瑞辰星生物技术(广州)有限公司 制浆造纸生产中控制有机污染物沉积的组合物
CN107578440B (zh) * 2017-09-14 2020-05-26 陕西科技大学 一种基于数字图像处理的纸浆脱墨检测与评价方法
BR112020010170B1 (pt) * 2017-11-21 2023-12-26 Solenis Technologies, L.P Método para medir contaminantes hidrofóbicos em pasta de polpa ou em sistema de fabricação de papel e método para controlar contaminantes hidrofóbicos em pasta de polpa ou em água de processo de fabricação de papel
CN108508013A (zh) * 2018-03-19 2018-09-07 玖龙纸业(太仓)有限公司 一种浆料胶粘物成分检测方法及去除率检测方法
CN109518513A (zh) * 2018-11-13 2019-03-26 岳阳林纸股份有限公司 一种造纸脱墨浆胶粘物控制剂使用效果检测装置及方法
CN109211894A (zh) * 2018-11-16 2019-01-15 芬欧汇川(中国)有限公司 用于测定造纸过程白水、废水或纸张中聚乙烯醇含量的方法和系统
CN109856333B (zh) * 2019-01-31 2024-04-16 南京林业大学 一种基于最小点火能预测的木质粉尘实时监测装置及其监测方法
CN112986051A (zh) * 2019-12-12 2021-06-18 广西金桂浆纸业有限公司 用于检测制浆造纸系统的检测装置及制浆造纸系统
CN112111216A (zh) * 2020-10-28 2020-12-22 杭州瑞思新材料有限公司 一种环保型水性漆及其制备方法
CN115494539B (zh) * 2022-11-16 2023-03-17 山东仪脉自动化科技有限公司 一种切片型超大流量气溶胶放射性核素全自动监测系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008053070A2 (en) * 2006-11-01 2008-05-08 Chun Ye Method and equipment for evaluation of recycled pulp and pulp
CN101910515A (zh) * 2007-11-30 2010-12-08 赫尔克里士公司 用于测量制浆造纸浆料中颗粒污染物沉淀的方法和装置
CN102741683A (zh) * 2009-12-18 2012-10-17 Fp创新研究中心 在线大污染物分析器和方法
CN103608515A (zh) * 2011-04-05 2014-02-26 纳尔科公司 监测回收中和涉及回收纸浆的纸张或薄页纸制造过程中的大粘性物的方法
CN104081200A (zh) * 2011-09-02 2014-10-01 凯米罗总公司 用于表征存在于液体中的固体物质的设备和方法
CN105869180A (zh) * 2016-06-06 2016-08-17 瑞辰星生物技术(广州)有限公司 造纸浆液中颗粒状胶粘物的图像获取系统和方法
CN105887551A (zh) * 2016-06-06 2016-08-24 瑞辰星生物技术(广州)有限公司 制浆造纸系统中胶粘物的捕获装置和方法
CN205711546U (zh) * 2016-06-06 2016-11-23 瑞辰星生物技术(广州)有限公司 制浆造纸系统中胶粘物的捕获装置
CN205750888U (zh) * 2016-06-06 2016-11-30 瑞辰星生物技术(广州)有限公司 造纸浆液中颗粒状胶粘物的图像获取系统

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008053070A2 (en) * 2006-11-01 2008-05-08 Chun Ye Method and equipment for evaluation of recycled pulp and pulp
CN101910515A (zh) * 2007-11-30 2010-12-08 赫尔克里士公司 用于测量制浆造纸浆料中颗粒污染物沉淀的方法和装置
CN102741683A (zh) * 2009-12-18 2012-10-17 Fp创新研究中心 在线大污染物分析器和方法
CN103608515A (zh) * 2011-04-05 2014-02-26 纳尔科公司 监测回收中和涉及回收纸浆的纸张或薄页纸制造过程中的大粘性物的方法
CN104081200A (zh) * 2011-09-02 2014-10-01 凯米罗总公司 用于表征存在于液体中的固体物质的设备和方法
CN105869180A (zh) * 2016-06-06 2016-08-17 瑞辰星生物技术(广州)有限公司 造纸浆液中颗粒状胶粘物的图像获取系统和方法
CN105887551A (zh) * 2016-06-06 2016-08-24 瑞辰星生物技术(广州)有限公司 制浆造纸系统中胶粘物的捕获装置和方法
CN205711546U (zh) * 2016-06-06 2016-11-23 瑞辰星生物技术(广州)有限公司 制浆造纸系统中胶粘物的捕获装置
CN205750888U (zh) * 2016-06-06 2016-11-30 瑞辰星生物技术(广州)有限公司 造纸浆液中颗粒状胶粘物的图像获取系统

Also Published As

Publication number Publication date
CN106053301A (zh) 2016-10-26
CN106053301B (zh) 2019-01-15

Similar Documents

Publication Publication Date Title
WO2017210975A1 (zh) 监测制浆造纸系统中胶粘物分布情况的方法
WO2017210974A1 (zh) 制浆造纸系统中胶粘物的捕获装置和方法
US9280726B2 (en) On-line macrocontaminant analyser and method
ES2718249T3 (es) Método y aparato para medir la deposición de contaminantes en partículas en suspensiones de pasta y papel
TWI565939B (zh) 監測回收中及帶有回收紙漿的紙或簿紙製造方法中的大黏物的方法及裝置
WO2017210973A1 (zh) 造纸浆液中颗粒状胶粘物的图像获取系统和方法
CN102356313B (zh) 疏水性染料在造纸过程中监测疏水性污染物的应用
KR102676281B1 (ko) 펄프 슬러리 또는 제지 시스템 내 소수성 오염물을 측정하는 방법
CN205750888U (zh) 造纸浆液中颗粒状胶粘物的图像获取系统
CN205711546U (zh) 制浆造纸系统中胶粘物的捕获装置
TWI689718B (zh) 樹脂分析方法及樹脂處理方法
US20130220003A1 (en) Method and apparatus for measuring deposition of particulate contaminants in pulp and paper slurries
US20080283206A1 (en) Method of measuring macro and micro stickies in a recycled sample containing pulp fibers
KR101744701B1 (ko) 고지유래 점착성 이물질 측정방법 및 통합형 측정기기
WO2011064459A1 (en) Dust collecting and analysing apparatus and method for determining the size and mass of particles detaching from fibrous material

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16904424

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16904424

Country of ref document: EP

Kind code of ref document: A1