CN101755090B - Method for the processing of pulp - Google Patents
Method for the processing of pulp Download PDFInfo
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- CN101755090B CN101755090B CN2008800183560A CN200880018356A CN101755090B CN 101755090 B CN101755090 B CN 101755090B CN 2008800183560 A CN2008800183560 A CN 2008800183560A CN 200880018356 A CN200880018356 A CN 200880018356A CN 101755090 B CN101755090 B CN 101755090B
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- 238000000034 method Methods 0.000 title claims abstract description 88
- 238000012545 processing Methods 0.000 title claims abstract description 79
- 239000011111 cardboard Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229920001131 Pulp (paper) Polymers 0.000 claims description 210
- 239000000123 paper Substances 0.000 claims description 34
- 238000002156 mixing Methods 0.000 claims description 33
- 238000010009 beating Methods 0.000 claims description 12
- 239000010893 paper waste Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 239000011087 paperboard Substances 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 20
- 238000010790 dilution Methods 0.000 description 18
- 239000012895 dilution Substances 0.000 description 18
- 239000006185 dispersion Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000227 grinding Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D99/00—Subject matter not provided for in other groups of this subclass
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/06—Regulating pulp flow
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/08—Regulating consistency
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
A method for the processing of pulp to be used in the manufacture of paper or cardboard, in which method the pulp is led from a pulp source to pulp processing and further into the circulation and the headbox of a paper or cardboard machine. The pulp processing takes place in a pulp processing pipework in such a way that the pulp flow proceeds continuously at a rate determined by the volume flow.
Description
Technical field
The present invention relates to a kind of method that the paper pulp that will be used for papermaking or manufacturing cardboard is handled; In said method, said paper pulp is directed to pulp treating apparatus and further is directed to the head box of paper machine or cardboard machine tool via short flow process EGR (short circulation) from pulp source.
Background technology
Pulp processing is the part of the technology of between pulp mill and paper machine or cardboard machine tool, carrying out.The purpose of carrying out pulp processing is: for the short flow process EGR in paper machine or the cardboard machine tool, make the paper pulp that comprises one or more paper pulp parts (partial pulp), said one or more paper pulp partly are blended in together.Pulp treating apparatus comprises a plurality of blending tanks, and the paper pulp part mixes in said blending tank, and the concentration of paper pulp and the concentration difference between the paper pulp are regulated, and has added necessary filler and other chemical substance.
In the pulp processing system that uses at present, be stored in independently in the hold-up tank from the paper pulp of paper pulp manufacturing installation, paper pulp is guided to beating process forward from said hold-up tank.Paper pulp is directed to dispersion tank and simultaneously the part of the bottom of hold-up tank or in the pipeline between said jar or in dispersion tank (disperser tank), said paper pulp is diluted from hold-up tank.According to the difference of paper pulp, can in beating process, carry out fiber separation or grinding to paper pulp.Paper pulp is further guided to common blending tank from hold-up tank, and different pulp compositions is blended in together in said common blending tank.Except different paper pulp ranks, also maybe some materials be admixed in the paper pulp, said material is filler and other necessary additive especially.Paper pulp is supplied to the entering machine chest from blending tank, and in said machine chest, paper pulp is diluted to ultimate density and is further guided to the short flow process EGR of paper machine.In the short flow process EGR of paper machine, the water that reclaims through the wet end (wire section) from paper machine is diluted to head box concentration with paper pulp.
The above-mentioned pulp processing system that uses at present is comparatively complicated and comprise a large amount of various jars and device, and this needs big quantity space.Cause a reason of this complexity of pulp processing system to be: in order to keep enough uniform pulp quality and, a plurality of pans and dispersion tank need to be set in order to keep constant process conditions as far as possible.
Yet; Jar that is provided with in succession and dilution position cause for example having produced the problem of technology controlling and process; Reason is to control chain and becomes long and complicated; Cause thus problem occurring aspect control concentration and the technological process, get into that the interior paper pulp quantity of short flow process EGR can change and the grammes per square metre of the paper that further causes producing can change thereby make to be supplied to.The inhomogeneous of concentration also is a problem, this for example be since jar in arching cause, the high concentration paper pulp sector-meeting that wherein separates from the inner surface of jar causes concentration peak value to occur.The undesired of concentration also possibly be because the inhomogeneous discharging or the infiltration of jar cause.
Proposed some solutions at present, the layout that wherein paper pulp is supplied to short flow process EGR and further is supplied to the paper machine head box is simplified; Yet; Do not attempt as yet up to now simplifying up to the whole beating process of the short flow process EGR of paper machine from the paper pulp feed bin; Also attempt removing all pans and the dispersion tank in the pulp processing as yet, this is because jar still is considered to realize the necessary guarantee of pulp quality.Existing solution relates generally to simplifies short flow process EGR.In addition, under situation about breaking down, the pulp processing system is considered to the buffering storage facility between pulp mill and the paper machine.
Summary of the invention
In the invention that the application comprised; We find: a large amount of pans, blending tank and dispersion tank are not to be provided with in beating process; Do not having under these the situation still superior in quality homogeneous paper pulp to be assigned on the short flow process EGR of paper machine or cardboard machine tool and further be assigned on the head box by means of simpler technology arrangement; By means of said technology arrangement, make to solve or alleviate the problems of the prior art at least greatly.Therefore; The purpose of this invention is to provide a kind of method that is used for pulp treatment; Make and to handle and to supply with the paper pulp that will be used for papermaking or manufacturing cardboard that flows to paper machine or cardboard machine tool from pulp source that this processing and supply make paper pulp can not be trapped in middle hold-up tank, blending tank or the machine chest.In addition, under the situation that does not have jar, implement the mixing of paper pulp part and the dilution of paper pulp.
In order to realize this purpose, principal characteristic features of the method according to the invention is: in the pulp processing pipe-line system, implement pulp processing, thereby make paper pulp stream under the speed by volume flow (volumeflow) decision, advance continuously.
Therefore, according to the method that is used for the pulp treatment of the present invention not present technology arrangement of needs distribution tank, blending tank, machine chest and pump or other executing agency relevant that can use usually with them.On the contrary; Thinking of the present invention basis is: said paper pulp for example is supplied to closed pulp processing pipe-line system from the paper pulp feed bin as stable and continuous volume flow; In said pipe-line system, paper pulp stream is all advanced flowing to paper pulp part mixing point from pulp source and further flow to via short flow process EGR the whole process of head box continuously.All executing agencies to required in the said pulp treatment process are selected, thereby make them can not cause the advancing continuously of said paper pulp in the said pipe-line system to produce delay.In addition, in said pipe-line system and executing agency, said paper pulp is not exposed to free air space, and this has reduced the mixing of air in the material body.
In the method according to the invention, the paper pulp that is used for papermaking or makes cardboard can comprise chemical pulp, mechanical pulp or mechanochemistry paper pulp, waste paper or recycled fiber.Said pulp source is paper pulp feed bin or waste paper tower preferably, but said pulp source also can be directly from the pipeline paper pulp (tube pulp) of pulp factories or from the paper pulp of beating apparatus.When said paper pulp when said pulp source is pumped to said pulp processing pipe-line system, said paper pulp is diluted to desired concn, perhaps for example in the part of the bottom of feed bin, implement dilution.Said paper pulp is advanced under this concentration, before said paper pulp is being supplied to the said head box of entering, is diluted to required head box concentration.Therefore, said paper pulp and diluted at a plurality of diverse locations place unlike those pulp processing system that kind of using at present.Pulp density in the said pulp processing pipe-line system is usually greater than 4%, up to being diluted to head box concentration at final dilution point place.
When said paper pulp part is blended in together, can implement the said step that is diluted to said head box concentration through the water that from the wet end of said paper machine, reclaims in said pulp processing pipe-line system.Therefore, the said step that is diluted to said head box concentration also occurs in the paper pulp stream, and said paper pulp advances continuously, until the head box charging pump that arrives said paper machine or cardboard machine tool.
The function of pulp processing is making beating, grinding and the correct grinding of paper pulp especially.In the method according to the invention, these required pulp processing steps are implemented in said pulp processing pipe-line system, thereby make said paper pulp stream can not stop, but in said technology, march to next procedure continuously from a step.The paper that will make or the rank of cardboard are depended in required processing step and executing agency in said pulp treatment process, and also depend on the paper pulp that can obtain; Therefore, their different and different along with paper machine and pulp section divisional processing.Yet the method that is used for pulp treatment according to the present invention can be applicable to all types of paper machines and cardboard machine tool.
Generally, in said pulp treatment process, also multiple filler, additive and other chemical substance are added in the said paper pulp, thereby for example improve quality or the printing character of processing paper.In the method according to the invention, these materials above-mentioned can be admixed in the said paper pulp in the said paper pulp stream.
According to the quality of the paper that will make or cardboard, will be supplied to the paper pulp that gets in the said short flow process EGR and further be supplied to the said head box of said paper machine and comprise one or more paper pulp parts.In the method according to the invention, said paper pulp part is blended in together in said paper pulp stream, and can use mixing pump to guarantee the carrying out that mixes.By means of said mixing pump, also possibly in said paper pulp, mix being added to filler, additive and other chemical substance in the said paper pulp in heterogeneity.
The equipment of required according to the method for the invention technology arrangement is simple, and the quantity of its executing agency that needs and other parts than the pulp processing system that uses at present still less.In addition, required according to the method for the invention device has littler size, this be because the volume of the paper pulp that will be processed less than volume of the prior art.In addition, also littler than present use of required pipe-line system.Therefore, technology arrangement according to the present invention has reduced the acquisition cost and the maintenance cost of technology.In addition, much less is also wanted in the required space of said technology arrangement.In addition, because said paper pulp for example is not in bigger jar, to mix and be pumped to another jar from a jar, therefore also reduced the power consumption of beating process.In addition, the water yield that consumes in the technology also is greatly diminished.
In the method according to the invention; When said paper pulp when said pulp source is directed to said pulp processing pipe-line system; Said paper pulp is diluted; And next time, said paper pulp is diluted to said head box concentration at the hybrid position place of said paper pulp part or is being supplied to get into and just is diluted to said head box concentration in the said head box before first.So just simplified the required control system of technology greatly, simultaneously the variation of pulp density is become steadily, and similarly, the problem that changes in flow rate is brought has minimized.Therefore, the quality of the feasible paper that produces becomes more even.
Also quickened the rank in the paper machine according to the method for the invention and changed, this is because paper pulp was not stored in a plurality of jars before said short flow process EGR, and has reduced the quantity that changes relevant waste paper material body with rank.Owing in pulp processing according to the present invention is arranged, pans are not set, therefore, the grumeleuse that breaks away from tank skin can not be introduced in the paper pulp, can not influence pulp quality yet.
Description of drawings
Below in conjunction with accompanying drawing advantageous embodiments more of the present invention are explained in more detail, wherein:
Fig. 1 is the sketch map according to the conventional pulp processing system in the paper machine of prior art;
Fig. 2 is the sketch map according to pulp processing of the present invention system; With
Fig. 3 is the sketch map of pulp processing system according to a second embodiment of the present invention.
The specific embodiment
Before the present invention was described in more detail, the applicant thought and is necessary more employed terms in the specification of the present invention are described." pulp processing pipe-line system (pulp processing pipework) " refers to pipe-line system and corresponding executing agency in this article; Paper pulp stream is advanced in said pipe-line system and corresponding executing agency; And in said pipe-line system and corresponding executing agency, carry out required pulp processing step, this comprises pulp section divided into groups to merge and mixes.In said pulp processing pipe-line system; The diameter of pipeline can change, and for example, the pipe diameter between the executing agency can be different; But the paper pulp stream in the executing agency can not stop, and therefore said paper pulp stream advances with the speed that depends on volume flow continuously." executing agency (actuator) " for example refers to grinder, beater, screening machine and pump, and these all are to implement the device that different pulp processing steps needs." paper pulp stream (pulp flow) " among the application refers to the paper pulp that in the pulp processing pipe-line system, advances.
Like Fig. 1 to the pulp processing system shown in Figure 3, show three paper pulp parts and show the processing of said paper pulp, but for according to the method for the invention, the quantity of paper pulp part can be N that N is >=1 positive integer with the form of simplifying view.Among the figure and unshowned content for example comprise control system, dilution water flow, fiber recovery system, all do not illustrate yet system all executing agencies that possibly relate to.
Fig. 1 is the sketch map according to the conventional pulp processing system of the paper machine of prior art or cardboard machine tool.
In Fig. 1; Each paper pulp part is supplied to distribution tank 13A, 13B, 13C by means of pump 11A, 11B, 11C from its hold-up tank 10A, 10B, 10C; And by dilution first, said dilution is to carry out through the dilution water flow that is introduced in the said paper pulp part to this paper pulp part in the part of the bottom of paper pulp feed bin or in the pipeline between jar.Each paper pulp part is by means of disperseing pump 14A, 14B, 14C to be got in the blending tank 15 by further the supply from dispersion tank 13A, 13B, 13C; In said blending tank; Said paper pulp partly is blended in together, and paper pulp is further supplied with in the entering machine chest 17 from blending tank 15 through pulp feed pump 16.Paper pulp is diluted at a plurality of differences place between a plurality of jars, and in machine chest 17, is diluted to final distribution concentration, and the paper pulp of high concentration is further supplied with from said machine chest through pulp feed pump 18 and got in the short flow process EGR.In beating process, if be necessary, can partly pull an oar or grind paper pulp, this for example realizes through the 12A of executing agency, 12B, 12C between feed bin and dispersion tank, and is as shown in Figure 1.In addition, in machine chest 17, the filler of necessity and other additive are admixed in the paper pulp.Make the so-called machine paper pulp that will be supplied in the short flow process EGR of entering in paper pulp is supplied to the short flow process EGR of entering, in machine chest 17, be adjusted to debita spissitudo before thus, paper pulp is diluted to head box concentration in said short flow process EGR.
Fig. 2 and Fig. 3 example show technology arrangement according to the method for the invention.
Fig. 2 is the sketch map that pulp processing is according to the method for the invention arranged.The paper pulp part is directed to the pulp processing pipe-line system by means of pump 11A, 11B, 11C from pulp source, and said pulp source is for example for storing tower 10A, 10B, 10C.In the bottom part of storing tower 10A, 10B, 10C, this paper pulp partly is diluted to desired concn and/or carries out said dilution when getting in the pulp processing pipe-line system when paper pulp is pumped. Pump 11A, 11B, 11C provide stable and continuous volume flow; Said volume flow (volume flow) is advanced and is arrived pulp feed pump 20 through the required 12A of executing agency, 12B and 12C and screening machine 19A, 19B, 19C; In said pulp feed pump, the paper pulp segment fluid flow is blended in together and makes up paper pulp stream and further introduced in the short flow process EGR of paper machine or cardboard machine tool as Continuous Flow.Can be every paper pulp segment fluid flow independently screening machine is set, as shown in the figure, or another kind of optional mode is, screening machine is placed the combination paper pulp stream before or after the pulp feed pump 20.
Fig. 3 shows another optional technology arrangement according to the method for the invention.The paper pulp part is assigned with under desired concn, for example is assigned to closed pulp processing pipe-line system by means of pump 11A, 11B, 11C from storage tower 10A, 10B, 10C, and and then, the paper pulp segment fluid flow is combination with one another in the pulp processing pipe-line system.The paper pulp stream of combination is directed to pulp feed pump 20 via executing agency 12 with screening machine 19 as the fluid that advances continuously, and said pulp feed pump further is supplied to short flow process EGR with paper pulp stream.
Fig. 2 and executing agency 12,12A, 12B, 12C and the 13A of executing agency, 13B, 13C, 19 shown in Figure 3 are not the parts that must be provided with in the pulp treatment process; Their position can change; And different executing agencies can be set at the diverse location place that is arranged in the pulp processing pipe-line system in a plurality of paper pulp paper pulp stream partly, or also said executing agency can be set not.The 12A of executing agency, 12B, 12C mainly refer to beater and/or grinder.In beating process, whether the character that the paper pulp of being paid close attention to is depended in said executing agency need be set.Pump 20 can be the so-called charging pump that is used for high concentration paper pulp, and said charging pump further is pumped to short flow process EGR with paper pulp, and perhaps pump 20 also can be so-called mixing pump, in said mixing pump, also dilutes simultaneously.
Pulp source is the paper pulp feed bin preferably, shown in figure.Paper pulp from the paper pulp manufacturing installation is stored in the feed bin in being introduced into actual beating process before usually.The function of paper pulp feed bin is as the buffering of the what is called between pulp mill and paper machine storage facility.Yet, pulp source also can be directly from the pipeline paper pulp of pulp mill, from the paper pulp stream of the pulping process of cellulose kinds of goods, or storing the waste paper tower of pulp waste paper or the so-called compensator between pulp mill and pulp treating apparatus.Therefore, paper pulp can comprise paper pulp, waste paper or the recycled fiber of processing with chemical mode, mechanical system or mechanochemistry mode.
Paper pulp is supplied with the process that gets in the pulp processing pipe-line system as stable and continuous paper pulp stream from pulp source to be realized through pump.In the time of in paper pulp is pumped entering pulp processing pipe-line system dilution water is admixed in the paper pulp, perhaps for example in the part of the bottom of hold-up tank, paper pulp is diluted.The concentration of paper pulp is maintained in the pulp processing pipe-line system under the given constant density scope, is preferably approximately 4% to 6%, but this concentration also can change in wideer concentration range according to the character of paper pulp.Can when through mixing pump 20 paper pulp of high concentration partly being mixed, use the water that from the wet end of paper machine, reclaims that paper pulp is diluted to head box concentration, the paper pulp of dilution be further guided to head box via necessary process steps from mixing pump.Therefore, this stage that is diluted in of so-called short flow process EGR has implemented, and paper pulp stream need not before head box diluted once more.
A necessary condition that in the pulp processing pipe-line system, realizes uniform concentration is in paper pulp feed bin, waste paper tower or equalizer tank, to carry out good mixing; Thereby make concentration bigger variation occur, but paper pulp can be diluted to desired concn and/or when pulp pump being fed in the pulp processing pipe-line system, paper pulp is diluted to desired concn in the part of the bottom of jar.In addition, the discharging of from jar or feed bin, carrying out must be uniform.
This pump has produced enough pressure, thereby in pipe-line system, produces enough paper pulp volume flows.Continuous paper pulp stream in the pipe-line system has guaranteed that paper pulp will can not form grumeleuse as conventional method on duct wall, and in conventional method, paper pulp can be trapped in the jar and in jar and mix, and wherein when jar discharges, arching and osmosis can take place.Therefore, especially make according to the method for the invention and possibly reduce because arching causes the fluctuation and other impurity that occur.
The pulp processing pipe-line system is a closed-system; In other words, paper pulp is not exposed to free air space in pipe-line system, and therefore this reduced the mixing of air in paper pulp.In the pulp processing pipe-line system,, possibly remove the air in the paper pulp if be necessary.If will be used as pulp source from the paper pulp of direct pulping process, the removal of this air is particularly advantageous.Preferably when pulp pump being fed in the pulp processing pipe-line system, implement the removal of air.
Paper pulp stream is advanced continuously and can not be stopped, so that through required processing step paper pulp is handled, said processing step for example is making beating, grinding and screening.This characteristic above in the selection of necessary executing agency and size assignment procedure, having considered.In addition, executing agency can not cause occurring refluxing.In addition, in the selection course of executing agency, the technical staff should consider and make this executing agency can not cause in paper pulp stream, occurring excessive resonance.
The filler of paper pulp stream is admixed in the paper pulp stream with other additive, and need not to be provided with independently blending tank.Material above-mentioned is added in the paper pulp segment fluid flow or after the paper pulp stream that forms combination and just adds said material first.Paper pulp flow velocity in the pulp processing pipe-line system should be designed so that make that above-mentioned substance is enough to be mixed in the paper pulp equably by means of flowing effect.Particularly, paper pulp stream receives the influence of the following fact: paper pulp is introduced in the pulp processing pipe-line system from pulp source under enough speed.Therefore the paper pulp flow velocity receives the influence of many factors, and should regulate so that it is adapted to the paper machine paid close attention to the paper pulp flow velocity.
Filler through mixing pump 20 realizes normally that with the even mixing of other additive in paper pulp through said mixing pump, paper pulp stream is introduced in the short flow process EGR.In addition, the paper pulp part is blended in together in the pulp processing pipe-line system, and need not in paper pulp stream, to be provided with independently blending tank, and promotes to mix by means of so-called pumping blender or mixing pump 20, as shown in Figures 2 and 3.If be necessary, can wet waste paper be directly introduced the compounding substances of paper pulp part, and need not to make it to circulate via waste paper tower and pulp treating apparatus.
In Fig. 3, in the screening of implementing before paper pulp stream through pulp feed pump 20 mixed pulps stream.Another kind of optional mode is, can before paper pulp is partly mixed, sieve independently each paper pulp segment fluid flow, and is as shown in Figure 2.Also screening machine 19 can be set first after pump 20.
As shown in Figures 2 and 3,, and toply propose, meanwhile can paper pulp be diluted to head box concentration through pulp feed pump 20 mixed pulps stream.Yet this technology arrangement also possibly not comprise pulp feed pump/mixing pump 20 as shown in the figure, but paper pulp is directly advanced as paper pulp continuously is popular in the whole process of the charging pump that flows to head box.
Pulp section shunting also possibly not mix, and gets in short flow process EGR and the head box but advance as continuous independent fluid.The pulp processing of each paper pulp part all is to carry out according to identical above-mentioned principle.
The system that said method is required is used to regulate concentration and paper pulp stream is simple; This is because paper pulp is only just diluted at such location point place; Paper pulp from said location point is introduced in the pipe-line system as stable volume flow; And next time, paper pulp just is diluted to required head box concentration first, and the said process that is diluted to required head box concentration is associated with the mixing of paper pulp part or before head box, carries out.The mode of the content through changing the dilution water that will be blended together with paper pulp is regulated pulp density; In other words, the amount of the dilution water of interpolation and paper pulp and concentration have suitable ratio.Because desired concn is regulated and when paper pulp is supplied with the dilution next time before getting into head box, just be diluted to first to the concentration of paper pulp having obtained in early days in pulp processing; The problem that therefore concentration perturbation is brought minimizes, and said concentration perturbation for example is the fluctuation of grammes per square metre.This especially receives the influence of the following fact: according to technology arrangement of the present invention the jar that will cause delay is not set, and the fluctuation of steady concentration rapidly.
The concentration of paper pulp part differs from one another, and according to the paper that will make, paper pulp is mixed with each other with various ratios.Therefore, for specific paper pulp part, the dilution demand of its paper pulp also is distinctive.Before paper pulp is partly mixed, in the pulp processing pipe-line system, measure concentration, and this concentration is used to regulate dilution water flow.
If be necessary; The pulp processing pipe-line system can comprise the dilution conduit; Said dilution conduit makes and maybe the paper pulp in the paper pulp stream be diluted; But, be supplied to from pulp source at paper pulp and paper pulp be diluted to desired concn when getting in the pulp processing pipe-line system as convention according to the method for the invention.
Above-mentioned technology arrangement has according to the method for the invention been simplified the pulp treatment process in paper machine and the cardboard machine tool and has partly also been simplified the technology arrangement of short flow process EGR; Thereby make to need not that a plurality of pans are set and blending tank just can keep the uniformity of paper pulp stream, and can in the paper pulp stream of advancing continuously, implement pulp processing.The paper pulp that is directed to pulp treating apparatus from pulp source is advanced rapidly and is arrived the head box of paper machine or cardboard machine tool through required processing step, and paper pulp is not trapped in the pans therebetween.
Top embodiment example shows according to solution of the present invention; And one of ordinary skill in the art are appreciated that according to technology arrangement of the present invention can comprise a plurality of processing steps according to the rank of the paper that will make or cardboard, and these processing steps are different along with the difference of paper machine or cardboard machine tool.Therefore, the present invention is not intended to be limited to embodiment or the device that top illustration goes out, and is intended in the scope of the theory of the present invention that appended claims limits, be used widely.
Claims (12)
1. one kind to being used for papermaking or making the method that the paper pulp of cardboard is handled; In said method; Said paper pulp is directed to pulp treating apparatus and further is directed to the head box of paper machine or cardboard machine tool via short flow process EGR from pulp source (10A, 10B, 10C); It is characterized in that, in the pulp processing pipe-line system, implement pulp processing, thereby make paper pulp stream under speed, advance continuously by the volume flow decision.
2. method according to claim 1 is characterized in that, said paper pulp is chemical pulp, mechanical pulp, mechanochemistry paper pulp, waste paper or recycled fiber.
3. method according to claim 1 and 2 is characterized in that, said pulp source (10A, 10B, 10C) is paper pulp feed bin, waste paper tower or direct pipeline paper pulp from the paper pulp manufacturing installation.
4. method according to claim 1 and 2 is characterized in that, said paper pulp is supplied with as stable and continuous volume flow and from said pulp source (10A, 10B, 10C) get in the said pulp processing pipe-line system.
5. method according to claim 1 and 2 is characterized in that, when said paper pulp when said pulp source (10A, 10B, 10C) is introduced in the said pulp processing pipe-line system, said paper pulp is diluted to desired concn.
6. method according to claim 3 is characterized in that, in the bottom part of paper pulp feed bin or waste paper tower (10A, 10B, 10C), said paper pulp is diluted to desired concn.
7. method according to claim 5 is characterized in that said paper pulp is diluted to 4% to 6% concentration.
8. method according to claim 1 and 2; It is characterized in that; In said pulp processing pipe-line system, said paper pulp stream is through pulp processing step (12,12A, 12B, 12C, 19,19A, 19B, 19C), and said pulp processing step comprises pulp mill, making beating and/or screening.
9. method according to claim 1 and 2 is characterized in that, filler, chemical substance and other additive that in said pulp processing pipe-line system, will be used for said paper pulp stream are mixed into said paper pulp.
10. method according to claim 1 and 2 is characterized in that, two or more paper pulp segment fluid flows combination with one another in said pulp processing pipe-line system becomes said paper pulp stream.
11. method according to claim 1 and 2 is characterized in that, in the time of two or more paper pulp segment fluid flow combination with one another, through the water that from wet end, reclaims said paper pulp is diluted.
12. method according to claim 9 is characterized in that, said mixing realizes through mixing pump (20).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20075398A FI119559B (en) | 2007-06-01 | 2007-06-01 | Procedure for treating pulp |
| FI20075398 | 2007-06-01 | ||
| PCT/FI2008/050310 WO2008145821A1 (en) | 2007-06-01 | 2008-05-28 | A method for the processing of pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101755090A CN101755090A (en) | 2010-06-23 |
| CN101755090B true CN101755090B (en) | 2012-06-20 |
Family
ID=38212369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800183560A Expired - Fee Related CN101755090B (en) | 2007-06-01 | 2008-05-28 | Method for the processing of pulp |
Country Status (6)
| Country | Link |
|---|---|
| CN (1) | CN101755090B (en) |
| DE (1) | DE112008001476T5 (en) |
| FI (1) | FI119559B (en) |
| GB (1) | GB2464843A (en) |
| RU (1) | RU2009149287A (en) |
| WO (1) | WO2008145821A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992003613A1 (en) * | 1990-08-14 | 1992-03-05 | A. Ahlstrom Corporation | Method and apparatus for stabilizing and simplifying an approach flow system for a paper-making machine |
| US5316383A (en) * | 1992-04-03 | 1994-05-31 | J. M. Voith Gmbh | Mixing system for mixing two liquids at constant mixture volume flow for supplying the headbox of a paper machine |
| US5683551A (en) * | 1994-06-30 | 1997-11-04 | Voith Sulzer Papiermachinen Gmbh | Apparatus and method for sectional pulp introduction to a papermaking machine headbox |
| FI102302B (en) * | 1989-10-10 | 1998-11-13 | Nils Anders Lennart Wikdahl | Method and apparatus for producing cellulose pulp with improved quality properties |
| US6440272B1 (en) * | 1998-06-29 | 2002-08-27 | Voith Sulzer Papiertechnik Patent Gmbh | Device for mixing stock suspensions |
-
2007
- 2007-06-01 FI FI20075398A patent/FI119559B/en not_active IP Right Cessation
-
2008
- 2008-05-28 CN CN2008800183560A patent/CN101755090B/en not_active Expired - Fee Related
- 2008-05-28 WO PCT/FI2008/050310 patent/WO2008145821A1/en active Application Filing
- 2008-05-28 RU RU2009149287/12A patent/RU2009149287A/en not_active Application Discontinuation
- 2008-05-28 DE DE112008001476T patent/DE112008001476T5/en not_active Withdrawn
- 2008-05-28 GB GB0920884A patent/GB2464843A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI102302B (en) * | 1989-10-10 | 1998-11-13 | Nils Anders Lennart Wikdahl | Method and apparatus for producing cellulose pulp with improved quality properties |
| WO1992003613A1 (en) * | 1990-08-14 | 1992-03-05 | A. Ahlstrom Corporation | Method and apparatus for stabilizing and simplifying an approach flow system for a paper-making machine |
| US5316383A (en) * | 1992-04-03 | 1994-05-31 | J. M. Voith Gmbh | Mixing system for mixing two liquids at constant mixture volume flow for supplying the headbox of a paper machine |
| US5683551A (en) * | 1994-06-30 | 1997-11-04 | Voith Sulzer Papiermachinen Gmbh | Apparatus and method for sectional pulp introduction to a papermaking machine headbox |
| US6440272B1 (en) * | 1998-06-29 | 2002-08-27 | Voith Sulzer Papiertechnik Patent Gmbh | Device for mixing stock suspensions |
Also Published As
| Publication number | Publication date |
|---|---|
| FI20075398A0 (en) | 2007-06-01 |
| FI119559B (en) | 2008-12-31 |
| GB2464843A (en) | 2010-05-05 |
| GB0920884D0 (en) | 2010-01-13 |
| WO2008145821A1 (en) | 2008-12-04 |
| RU2009149287A (en) | 2011-07-20 |
| DE112008001476T5 (en) | 2010-05-06 |
| CN101755090A (en) | 2010-06-23 |
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