CN107083718A - A kind of boxboard paper pulp molding technique - Google Patents
A kind of boxboard paper pulp molding technique Download PDFInfo
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- CN107083718A CN107083718A CN201710471548.8A CN201710471548A CN107083718A CN 107083718 A CN107083718 A CN 107083718A CN 201710471548 A CN201710471548 A CN 201710471548A CN 107083718 A CN107083718 A CN 107083718A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of boxboard paper pulp molding technique, its drip irrigation device is to comprise the following steps decomposition removal of impurities screening slagging-off concentration, chopped fiber, middle fiber and long fibre are in processing by extreme cyclic process, the excellent effect for the slagging-off so realized, the fiber produced is purer；Residue after collection chopped fiber, middle fiber and long fibre can also be used to the not high paper of production requirement, then utilization rate is high.
Description
Technical field
The present invention relates to pulp technology for making paper, more particularly to a kind of boxboard paper pulp molding technique.
Background technology
China is big producer, up to ten thousand yuan of annual exchange of commodity, and kinds of goods need to be packed in sales process,
Most common packaging material is carton, not only carton, in life usually, similarly produces substantial amounts of waste paper, is wrapped
Old and useless newspaper, periodical, writing paper etc. are included, therefore, annual China has substantial amounts of waste paper and waste paperboard to be handled, and this
A little most of waste paper and litter decoration produce new value by the repetition processing and utilization in paper mill.But, domestic waste paper bag
The magazine contained is more, also many straw pulps, and carries out repeatedly re-using reproduction by some small processing factories, it is difficult to output matter
Measure, the packaging Paper or cardboard that intensity is high, particularly China it is higher to the demand of wrapping paper and cardboard, and corresponding require
Compare high, including the intensity of paper, toughness, ring crush index and burst index etc., these are all first there are papermaking enterprise needs gram
The problem of taking, the enterprise of waste paper regenerated production is fully relied on especially for some, how to overcome these problems to concern in enterprise
Survival and development.
Notification number discloses a kind of light basis weight environment-friendly type high intensity kraft case paper for CN 104099793B Chinese patent
The production method of plate, it is disclosed that waste paper is crushed to form slurry by paper pulp molding technique, including (1) into pulper, slurry
For the mixture of fiber, impurity and water, good slurry enters defibrator by the sieve plate of pulping motor spindle；(2) hydrabrusher
Slurry enter impurity separator, be again separate out good slurry and waste residue, good slurry loopback enters in pulper to be recycled, waste residue
Discharge is abandoned；(3) good slurry is sent into defibrator to the separation for carrying out fiber and impurity again, the thick slurry loopback isolated enters
In pulper, the screened stock isolated separates out long fibre and chopped fiber by gradation sizing.
In the paper pulp molding technique, the processing for paper pulp is fairly simple, is merely able to utilize fiber a part of in waste paper,
Utilization rate is not high.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of boxboard paper pulp molding technique,
Technique paper pulp utilization rate when handling paper pulp is high.
The present invention above-mentioned technical purpose technical scheme is that：A kind of boxboard paper pulp molding
Technique, it is characterized in that：Comprise the following steps：
Step 1：Discongest：The waste paper of recovery is delivered in hydrabrusher and discongested；
Step 2：Removal of impurities：Slurry after decomposition is pumped to one section of level HC Cleaner through discharging, the good slurry on upper strata is collected, by lower floor
Collect into the kettle that gathers materials well mixed with the slurry in middle level, the upper strata slurry in the kettle that gathers materials is delivered to the highly concentrated slagging-off of two sections of levels
Device, collects the good slurry on upper strata, and the slag charge centralized recovery of gather materials kettle and two Duan Ji HC Cleaners lower floors is through highly concentrated belt thickener pressure
Filter compresses；
Step 3：The good slurry mixing on one section of level HC Cleaner and two sections of level HC Cleaner upper stratas in step 2, through one section of pressure
Screening machine is screened, and isolates the middle fiber pulp and long fiber pulp and the short fibered pulp of lower floor on upper strata；
Step 4：Short fibered pulp is added into one section of short fiber slag remover, the good slurry on upper strata is collected, lower floor's filter pulp, which is collected, to be continued
Two sections of short fiber slag removers are entered to, the chopped fiber through two sections of short fiber slag remover upper stratas goes successively to one section of chopped fiber slagging-off
Device, the slurry of lower floor enters to three sections of short fiber slag removers, collects the good slurry on three sections of short fiber slag remover upper stratas through two sections of short fibres
Scummer filtering is tieed up, the slurry of bottom is filtered into four sections of short fiber slag removers, collects four sections of short fiber slag remover upper stratas
Good slurry to three sections of short fiber slag removers filter, the slurry of bottom is collected to be compressed through short fine belt thickener press filter；
Step 5：Good slurry made from one section of short fiber slag remover in step 4 is delivered in chopped fiber polydisc thickener and concentrated；
Step 6：Chopped fiber after concentration is delivered in fluff pulp tower and concentrated, in case being delivered to paper machine room.
, in step 2 can by one section of level HC Cleaner and two sections of level HC Cleaners by above-mentioned technical proposal
The impurity of some plastic bags and staple in removing slurry etc., then by one section of chopped fiber when short fibered pulp is handled
Proceed processing after scummer, in triplicate, then the collection rate to fiber will be than larger, then to the utilization rate of waste paper
Will be higher.
The present invention is further arranged to：It is 3~5% to be added in step 2 to the concentration of the slurry of one section of HC Cleaner.
By above-mentioned technical proposal, the concentration control of paper pulp after being decomposed by water conservancy pulper 3~5% its
By slagging-off excellent effect during one section of HC Cleaner.
The present invention is further arranged to：Added in step 4 concentration to the good slurry of one section of short fiber slag remover for 0.8~
1.0%.
By above-mentioned technical proposal, when the good slurry by one section of short fiber slag remover concentration control 0.8~1.0% its
Slagging-off excellent effect when by First short fiber slag remover.
The present invention is further arranged to：Step 2 middle fiber pulp at the middle and upper levels and long fiber pulp are through two sections of pressure screening machines point
Separate out the long fiber pulp on upper strata and the middle fiber pulp of lower floor.
By above-mentioned technical proposal, middle fiber and long fibre can just be separated by two sections of pressure screening machines, so
Just the fiber of different length can respectively be handled, treatment effect can be more excellent.
The present invention is further arranged to：
The treatment process of middle fiber pulp comprises the following steps,
(1) the middle fiber pulp on upper strata is filtered through fine low dense scummer in one section, the good slurry on upper strata is collected, by the filter pulp of lower floor through two
Fine low dense scummer in section, the good slurry on upper strata is added to fine low dense scummer in one section after fine low dense scummer in two sections, under
The filter pulp of layer is added to fine low dense scummer in three sections, and the good slurry on upper strata is added into two sections after fine low dense scummer in three sections
Fine low dense scummer, the filter pulp of lower floor is added to fine low dense scummer in four sections, through the upper strata of fine low dense scummer in four sections
Good slurry is added to fine low dense scummer in three sections, and then filter pulp is collected and compressed through belt thickener press filter, while will be fine in one section
Good slurry in low dense scummer is collected；
(2) the good slurry collected adds into middle fine polydisc thickener concentration；
(3) the good slurry of concentration is added eliminates organic impurities into middle fine heat partition system；
(4) the good slurry for removing organic impurities adds the grinding homogeneity into middle fine mill；
(5) fine mill polishing in the middle fiber warp of grinding homogeneity, the slurry pipeline transport after polishing is concentrated into middle fine slurry tower, in case defeated
Deliver to middle fine paper machine stock tank standby.
The present invention is further arranged to：The treatment process of long fiber pulp comprises the following steps,
S1. the long fiber pulp of lower floor is filtered through the low dense scummer of one section long fibre, collects the good of the one section long low dense scummer upper strata of fibre
Slurry, the filter pulp of lower floor is through the two sections long low dense scummer of fibre, and the good slurry on upper strata is added to one section after the two sections long low dense scummer of fibre
Long fine low dense scummer, the filter pulp of lower floor is added to the three sections long low dense scummer of fibre, the upper strata after the three sections long low dense scummer of fibre
Good slurry add to the two sections long low dense scummer of fibre, the filter pulp of lower floor is added to the four sections long low dense scummer of fibre, through the four fine sections of length
The good slurry on the upper strata of low dense scummer is added to the three sections long low dense scummer of fibre, and then filter pulp is collected through belt thickener press filter pressure
Contracting, while the good slurry in the one section long low dense scummer of fibre is collected；
S2. add into pressure screening system and handled by the good slurry of the one section long low dense scummer of fibre, it is qualified by screening
Long fibre is added to long fine many disk thickener concentrations；
S3. the long fibre concentrated is added eliminates organic impurities into long fine heat partition system；
S4. the long fibre for removing organic impurities adds the grinding homogeneity into long fine mill；
S5. the slurry pipeline transport through long fine mill is concentrated into long fine slurry tower, in case it is standby to be delivered to long fine paper machine stock tank.
By above-mentioned technical proposal, four sections of low dense scummer is passed through when centering fiber and long fibre are handled, such as
This allows for middle fiber and the long stapled rate of recovery is higher, and is also screened after HC Cleaner in long fibre,
So it can just select the fiber of length within the specific limits, specification will be than more uniform, and quality during generation paper will
Compare high-quality, then middle fiber and long fibre can carry out concentration by institute's disk thickener, then pass through heat partition
System eliminates organic impurities, eventually passes mill fiber after fibre length again grinding homogeneity is standby.
The present invention is further arranged to：Pressure screening system includes one section of fine screen, two sections of fine screens and three sections of fine screens in 2,
The one section long fine good slurry for handling low dense scummer is added to one section of fine screen, the slurry on the upper strata by one section of fine screen is added to two
Section fine screen, the good slurry for collecting two sections of fine screen lower floors is added to one section of fine screen, and the slurry on two sections of fine screen upper stratas is added to three sections of fine screens,
The good slurry of three sections of fine screen lower floors is added to two sections of fine screens, the featured belt thickener press filter compression of slurry centralized collection of lower floor.
By above-mentioned technical proposal, the long stapled specification filtered out by three sections of fine screens is maintained in certain scope,
And triple screenings substantially can screen up to specification, the rate of recovery of realization is higher.
The present invention is further arranged to：The screen cloth specification of one section of fine screen is 0.15mm.
By above-mentioned technical proposal, the selection of the screen cloth of fine screen then enables to the length at selection to continue beloved daughter to be within the range
Specification be held in 0.15mm once, then the paper quality being molded will be fine and smooth.
The present invention is further arranged to：Short fine belt thickener press filter, middle fine belt thickener press filter, long fine belt thickener
Filter press, the residue collection of selected belt thickener press filter are used as production corrugated paper.
By above-mentioned technical proposal, shaping corrugated paper will be collected by the fiber of highly concentrated belt thickener press filter, such as
This is achieved that the utilization rate higher to waste paper, possesses the feature of environmental protection.
The present invention is further arranged to：Kettle, the slag charge of two sections of HC Cleaner lower floors gather materials through highly concentrated belt thickener press filtration
The filter residue of machine compression, which is added into waterpower smoothing machine, isolates impurity, then adds filtrate to rotary drum sieve and collects good slurry, adds
To one section of HC Cleaner removal of impurities, slurry recycling.
, may be containing the untreated fiber more than comparing, so continuing with energy in filter residue by above-mentioned technical proposal
Enough fibers for further collecting out crosslinking, then recovery utilization rate is higher.
In summary, having the beneficial effect that in contrast to prior art of the invention：
1st, chopped fiber, middle fiber and long fibre are in processing by extreme cyclic process, and the effect for the slagging-off so realized is excellent
Good, the fiber produced is purer；
2nd, the corrugation that the residue after collection chopped fiber, middle fiber and long fibre can also be not high to production requirement,
Utilization rate is high.
Brief description of the drawings
Fig. 1 is the process chart of embodiment 1.
Embodiment
The present invention is described in further detail with reference to embodiments.
Embodiment 1
A kind of boxboard paper pulp molding technique, shown in reference picture 1, comprises the following steps：
Step 1：Decompose：The waste paper of recovery is delivered in hydrabrusher and decomposed；
Step 2：Removal of impurities：Slurry after decomposition is pumped to one section of level HC Cleaner through discharging, and the concentration of the slurry of addition is
3%, the good slurry on upper strata is collected, the slurry of lower floor and middle level is collected into the kettle that gathers materials well mixed, by the upper strata in the kettle that gathers materials
Slurry pipeline transport collects the good slurry on upper strata, gather materials kettle and the slag charge of two Duan Ji HC Cleaners lower floors to two sections of level HC Cleaners
Centralized recovery compresses through highly concentrated belt thickener press filter, the kettle that gathers materials, two sections of HC Cleaner lower floors slag charge it is dense through highly concentrated belt
The filter residue of contractive pressure filter compression, which is added into waterpower smoothing machine, isolates impurity, then adds filtrate to rotary drum sieve and collects good
Slurry, is added to one section of HC Cleaner removal of impurities, slurry recycling；
Step 3：The good slurry mixing on one section of level HC Cleaner and two sections of level HC Cleaner upper stratas in step 2, through one section of pressure
Screening machine is screened, and isolates the middle fiber pulp and long fiber pulp and the short fibered pulp of lower floor on upper strata；
Step 4：Concentration is added into one section of short fiber slag remover for 0.8% short fibered pulp, the good slurry on upper strata is collected, lower floor
Filter pulp is collected and gone successively to two sections of short fiber slag removers, and the chopped fiber through two sections of short fiber slag remover upper stratas goes successively to one section
Short fiber slag remover, the slurry of lower floor enters to three sections of short fiber slag removers, collects the good slurry on three sections of short fiber slag remover upper stratas
Filtered through two sections of short fiber slag removers, the slurry of bottom is filtered into four sections of short fiber slag removers, collect four sections of chopped fibers
The good slurry on scummer upper strata to three sections of short fiber slag removers are filtered, and the slurry of bottom is collected through short fine belt thickener press filter pressure
Contracting；
Step 5：Good slurry made from one section of short fiber slag remover in step 4 is delivered in chopped fiber polydisc thickener and concentrated；
Step 6：Chopped fiber after concentration is delivered in fluff pulp tower and concentrated, in case being delivered to paper machine room；
Step 2 middle fiber pulp at the middle and upper levels and long fiber pulp isolate long fiber pulp and the lower floor on upper strata through two sections of pressure screening machines
Middle fiber pulp；
The treatment process of middle fiber pulp comprises the following steps,
(1) the middle fiber pulp on upper strata is filtered through fine low dense scummer in one section, the good slurry on upper strata is collected, by the filter pulp of lower floor through two
Fine low dense scummer in section, the good slurry on upper strata is added to fine low dense scummer in one section after fine low dense scummer in two sections, under
The filter pulp of layer is added to fine low dense scummer in three sections, and the good slurry on upper strata is added into two sections after fine low dense scummer in three sections
Fine low dense scummer, the filter pulp of lower floor is added to fine low dense scummer in four sections, through the upper strata of fine low dense scummer in four sections
Good slurry is added to fine low dense scummer in three sections, and then filter pulp is collected and compressed through belt thickener press filter, while will be fine in one section
Good slurry in low dense scummer is collected；
(2) the good slurry collected adds into middle fine polydisc thickener concentration；
(3) the good slurry of concentration is added eliminates organic impurities into middle fine heat partition system；
(4) the good slurry for removing organic impurities adds the grinding homogeneity into middle fine mill；
(5) fine mill polishing in the middle fiber warp of grinding homogeneity, the slurry pipeline transport after polishing is concentrated into middle fine slurry tower, in case defeated
Deliver to middle fine paper machine stock tank standby；
The treatment process of long fiber pulp comprises the following steps,
S1. the long fiber pulp of lower floor is filtered through the low dense scummer of one section long fibre, collects the good of the one section long low dense scummer upper strata of fibre
Slurry, the filter pulp of lower floor is through the two sections long low dense scummer of fibre, and the good slurry on upper strata is added to one section after the two sections long low dense scummer of fibre
Long fine low dense scummer, the filter pulp of lower floor is added to the three sections long low dense scummer of fibre, the upper strata after the three sections long low dense scummer of fibre
Good slurry add to the two sections long low dense scummer of fibre, the filter pulp of lower floor is added to the four sections long low dense scummer of fibre, through the four fine sections of length
The good slurry on the upper strata of low dense scummer is added to the three sections long low dense scummer of fibre, and then filter pulp is collected through belt thickener press filter pressure
Contracting, while the good slurry in the one section long low dense scummer of fibre is collected；
S2. add into pressure screening system and handled by the good slurry of the one section long low dense scummer of fibre, it is qualified by screening
Long fibre is added to long fine many disk thickener concentrations；
It is mono- section of fine screen of 0.15mm that processing procedure through pressure screening system, which includes good slurry addition to mesh screen specification, by one
The slurry on the upper strata of section fine screen is added to two sections of fine screens, and the good slurry for collecting two sections of fine screen lower floors is added to one section of fine screen, two sections of essences
The slurry on sieve upper strata is added to three sections of fine screens, and the good slurry of three sections of fine screen lower floors is added to two sections of fine screens, and the slurry of lower floor, which is concentrated, to be received
Collect featured belt thickener press filter compression；
S3. the long fibre concentrated is added eliminates organic impurities into long fine heat partition system；
S4. the long fibre for removing organic impurities adds the grinding homogeneity into long fine mill；
S5. the slurry pipeline transport through long fine mill is concentrated into long fine slurry tower, in case it is standby to be delivered to long fine paper machine stock tank；
Short fine belt thickener press filter, middle fine belt thickener press filter, long fine belt thickener press filter, selected belt thickener press filtration
The residue collection of machine is used as production corrugated paper；
The filter residue that the slag charge of the kettle that gathers materials, two sections of HC Cleaner lower floors compresses through belt thickener press filter is added to waterpower scarfing cinder
Impurity is isolated in machine, then filtrate is added to rotary drum sieve and collects good slurry, is added to one section of HC Cleaner removal of impurities, slurry is returned
Receipts processing.
Embodiment 2
The difference of embodiment 2 and embodiment 1 is that addition to the concentration of the slurry of the highly concentrated slagging-off section of one-level is 3.5%, adds extremely
The concentration of the good slurry of one section of short fiber slag remover is 0.85%, and other are consistent with embodiment 1.
Embodiment 3
The difference of embodiment 3 and embodiment 1 is that addition to the concentration of the slurry of the highly concentrated slagging-off section of one-level is 4%, adds to one
The concentration of the good slurry of section short fiber slag remover is 0.9%, and other are consistent with embodiment 1.
Embodiment 4
The difference of embodiment 4 and embodiment 1 is that addition to the concentration of the slurry of the highly concentrated slagging-off section of one-level is 4.5%, adds extremely
The concentration of the good slurry of one section of short fiber slag remover is 0.95%, and other are consistent with embodiment 1.
Embodiment 5
The difference of embodiment 5 and embodiment 1 is that addition to the concentration of the slurry of the highly concentrated slagging-off section of one-level is 4%, adds to one
The concentration of the good slurry of section short fiber slag remover is 1%, and other are consistent with embodiment 1.
Via the operation in above-described embodiment 1~5, the waste paper rate of recovery reaches 65%.
Described above is only the exemplary embodiment of the present invention, not for limiting the scope of the invention, this hair
Bright protection domain is determined by appended claim.
Claims (10)
1. a kind of boxboard paper pulp molding technique, it is characterized in that：Comprise the following steps：
Step 1：Discongest, the waste paper of recovery is delivered in hydrabrusher and discongested；
Step 2：Removal of impurities, the slurry after decomposition is pumped to one section of level HC Cleaner through discharging, the good slurry on upper strata is collected, by lower floor
Collect into the kettle that gathers materials well mixed with the slurry in middle level, the upper strata slurry in the kettle that gathers materials is delivered to the highly concentrated slagging-off of two sections of levels
Device, collects the good slurry on upper strata, and the slag charge centralized recovery of gather materials kettle and two Duan Ji HC Cleaners lower floors is through highly concentrated belt thickener pressure
Filter compresses；
Step 3：The good slurry mixing on one section of level HC Cleaner and two sections of level HC Cleaner upper stratas in step 2, through one section of pressure
Screening machine is screened, and isolates the middle fiber pulp and long fiber pulp and the short fibered pulp of lower floor on upper strata；
Step 4：Short fibered pulp is added into one section of short fiber slag remover, the good slurry on upper strata is collected, lower floor's filter pulp, which is collected, to be continued
Two sections of short fiber slag removers are entered to, the chopped fiber through two sections of short fiber slag remover upper stratas goes successively to one section of chopped fiber slagging-off
Device, the slurry of lower floor enters to three sections of short fiber slag removers, collects the good slurry on three sections of short fiber slag remover upper stratas through two sections of short fibres
Scummer filtering is tieed up, the slurry of bottom is filtered into four sections of short fiber slag removers, collects four sections of short fiber slag remover upper stratas
Good slurry to three sections of short fiber slag removers filter, the slurry of bottom is collected to be compressed through short fine belt thickener press filter；
Step 5：Good slurry made from one section of short fiber slag remover in step 4 is delivered in chopped fiber polydisc thickener and concentrated；
Step 6：Chopped fiber after concentration is delivered in fluff pulp tower and concentrated, in case being delivered to paper machine room.
2. a kind of boxboard paper pulp molding technique according to claim 1, it is characterized in that：Added in step 2 to one section
The concentration of the slurry of HC Cleaner is 3 ~ 5%.
3. a kind of boxboard paper pulp molding technique according to claim 1, it is characterized in that：Added in step 4 to one section
The concentration of the good slurry of short fiber slag remover is 0.8 ~ 1.0%.
4. a kind of boxboard paper pulp molding technique according to claim 1, it is characterized in that：The middle fibre of step 2 at the middle and upper levels
Dimension slurry and long fiber pulp isolate the long fiber pulp on upper strata and the middle fiber pulp of lower floor through two sections of pressure screening machines.
5. a kind of boxboard paper pulp molding technique according to claim 4, it is characterized in that：The treatment process of middle fiber pulp
Comprise the following steps,
（1）The middle fiber pulp on upper strata is filtered through fine low dense scummer in one section, the good slurry on upper strata is collected, by the filter pulp of lower floor through two
Fine low dense scummer in section, the good slurry on upper strata is added to fine low dense scummer in one section after fine low dense scummer in two sections, under
The filter pulp of layer is added to fine low dense scummer in three sections, and the good slurry on upper strata is added into two sections after fine low dense scummer in three sections
Fine low dense scummer, the filter pulp of lower floor is added to fine low dense scummer in four sections, through the upper strata of fine low dense scummer in four sections
Good slurry is added to fine low dense scummer in three sections, and then filter pulp is collected and compressed through belt thickener press filter, while will be fine in one section
Good slurry in low dense scummer is collected；
（2）The good slurry collected adds into middle fine polydisc thickener concentration；
（3）The good slurry of concentration is added eliminates organic impurities into middle fine heat partition system；
（4）The good slurry for removing organic impurities adds the grinding homogeneity into middle fine mill；
（5）Fine mill polishing in the middle fiber warp of grinding homogeneity, the slurry pipeline transport after polishing is concentrated into middle fine slurry tower, in case defeated
Deliver to middle fine paper machine stock tank standby.
6. a kind of boxboard paper pulp molding technique according to claim 4, it is characterized in that：The treatment process of long fiber pulp
Comprise the following steps,
S1. the long fiber pulp of lower floor is filtered through the low dense scummer of one section long fibre, collects the good of the one section long low dense scummer upper strata of fibre
Slurry, the filter pulp of lower floor is through the two sections long low dense scummer of fibre, and the good slurry on upper strata is added to one section after the two sections long low dense scummer of fibre
Long fine low dense scummer, the filter pulp of lower floor is added to the three sections long low dense scummer of fibre, the upper strata after the three sections long low dense scummer of fibre
Good slurry add to the two sections long low dense scummer of fibre, the filter pulp of lower floor is added to the four sections long low dense scummer of fibre, through the four fine sections of length
The good slurry on the upper strata of low dense scummer is added to the three sections long low dense scummer of fibre, and then filter pulp is collected through belt thickener press filter pressure
Contracting, while the good slurry in the one section long low dense scummer of fibre is collected；
S2. add into pressure screening system and handled by the good slurry of the one section long low dense scummer of fibre, it is qualified by screening
Long fibre is added to long fine many disk thickener concentrations；
S3. the long fibre concentrated is added eliminates organic impurities into long fine heat partition system；
S4. the long fibre for removing organic impurities adds the grinding homogeneity into long fine mill；
S5. the slurry pipeline transport through long fine mill is concentrated into long fine slurry tower, in case it is standby to be delivered to long fine paper machine stock tank.
7. a kind of boxboard paper pulp molding technique according to claim 6, it is characterized in that：Pressure screening system bag in S2
One section of fine screen, two sections of fine screens and three sections of fine screens have been included, the one section long fine good slurry for handling low dense scummer has been added to one section of fine screen,
The slurry on the upper strata by one section of fine screen is added to two sections of fine screens, and the good slurry for collecting two sections of fine screen lower floors is added to one section of fine screen,
The slurry on two sections of fine screen upper stratas is added to three sections of fine screens, and the good slurry of three sections of fine screen lower floors is added to two sections of fine screens, the slurry of lower floor
The featured belt thickener press filter compression of centralized collection.
8. a kind of boxboard paper pulp molding technique according to claim 7, it is characterized in that：The screen cloth specification of one section of fine screen
For 0.15mm.
9. a kind of boxboard paper pulp molding technique according to claim 7, it is characterized in that：Short fine belt thickener press filtration
Machine, middle fine belt thickener press filter, long fine belt thickener press filter, the residue collection of selected belt thickener press filter are used as production
Corrugated paper.
10. a kind of boxboard paper pulp molding technique according to claim 1, it is characterized in that：Gather materials kettle, two sections highly concentrated remove
The filter residue that the slag charge of Zha Qi lower floors compresses through highly concentrated belt thickener press filter, which is added into waterpower smoothing machine, isolates impurity, then
Filtrate is added to rotary drum sieve and collects good slurry, is added to one section of HC Cleaner removal of impurities, slurry recycling.
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| CN110331611A (en) * | 2019-08-07 | 2019-10-15 | 山鹰国际控股股份公司 | A kind of waste paper pulp-making fine screen tailings treatment process |
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| CN111455708B (en) * | 2020-05-15 | 2021-04-06 | 山鹰国际控股股份公司 | Preparation method of low-gram-weight writing paper |
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| CN113502678A (en) * | 2021-06-28 | 2021-10-15 | 联盛纸业（龙海）有限公司 | Low-concentration heavy-weight deslagging method for craft paper OCC slurry |
| CN113502678B (en) * | 2021-06-28 | 2023-04-07 | 联盛纸业（龙海）有限公司 | Low-concentration heavy-weight deslagging method for kraft cardboard OCC slurry |
| CN113481750A (en) * | 2021-07-26 | 2021-10-08 | 东莞顺裕纸业有限公司 | Pulping process with good slag removal effect |
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