CN101613971A - A kind of papermaking and equipment thereof - Google Patents
A kind of papermaking and equipment thereof Download PDFInfo
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- CN101613971A CN101613971A CN200810017067A CN200810017067A CN101613971A CN 101613971 A CN101613971 A CN 101613971A CN 200810017067 A CN200810017067 A CN 200810017067A CN 200810017067 A CN200810017067 A CN 200810017067A CN 101613971 A CN101613971 A CN 101613971A
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Abstract
The present invention relates to a kind of pulp and paper technology, be particularly related to the pulping and paper-making new technology under a kind of normal temperature and pressure, mainly comprise pulping after the raw material that will be added with the pulping medicament is through the process of at least once compression or expansion, it adopts pretreated raw material is fed the reaction unit that has spiral pushing device that includes at least one pulping section continuously, and in the process of raw material motion, add the pulping medicament, after adopting this production technology, replaced original raw material to fritter, processing steps such as boiling, reduced the consumption of the processing medicament of strong acid or highly basic class, realized the qualified discharge of industrial wastewater, the normal temperature and pressure of having realized the pulping and paper-making reaction carries out, reduce energy consumption, reached the purpose of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to pulp and paper technology, be specifically related to contain the pulp and paper technology of the straw plant of fiber, the pulping and paper-making new technology under particularly a kind of normal temperature and pressure.
Background technology
Traditional papermaking straw pulp production technology generally adopts the alkaline process chemical pulping, the straw pulp black liquor that this method produces, its improvement is the emphasis of efforts at environmental protection, treatment technology to straw pulp black liquor has become a universally acknowledged difficult problem, the optimal path of the improvement wheat straw black liquor of generally acknowledging is that alkali reclaims, but because Straw Pulp exists water filtering performance poor, black liquor viscosity is big, unfavorable factors such as silicon content height, make the alkali recovery technology difficulty very big, for small-sized, even medium-sized enterprise, investment is big owing to curb environmental pollution, the operating cost height is raw material papermaking with the wheat straw, produce profit and avoid polluting possibility hardly.Have the little paper mill of 6000-7000 family to close because of not solving the pulp-making waste-water pollution in recent years, available resources such as a large amount of wheat straws go out of use; Because economic interests drive, still also have many wastewater treatments not up to standard in, small paper mill do not close; Some cost a huge sum of money pollution treatment engineerings of building are because the operating cost height, still sewage effluent stealthily.The national at present straw pulp black liquor that the alkaline process chemical pulp generation more than 30% is arranged approximately directly effluxes basically without any processing, accounts for the 80-90% of gross contamination thing generating capacity.The black waste liquid of discharging contains a large amount of pollutants, and is the most serious to water pollution.
Provide the method for employing enzyme catalyst to improve this technology at the many enterprises of this problem, but because technology is limit, only can reduction in a small amount pollute, what bring simultaneously is the significantly raising of equipment cost and production cost, is difficult to be promoted widely; Since the major part of paper industry pollute all be from black liquor, therefore only existing technology is improved and can't be changed this situation that black liquor exists; Simultaneously because existing technology all is to adopt the reaction condition of High Temperature High Pressure; demand for the energy is very big; in order to provide High Temperature High Pressure also will expend a large amount of water vapour resources, so just be unfavorable for the protection of environment more simultaneously, therefore be badly in need of a kind of brand-new paper technology and replaced.
Summary of the invention
Many deficiencies at existing papermaking existence, the invention provides a kind of pulping and paper-making new technology and equipment thereof, it adopts the pretreated straw plant that contains fiber is fed the reaction unit that has spiral pushing device that includes at least one pulping section continuously, and in the process of raw material motion, add the pulping medicament, after adopting this production technology, replaced original raw material to fritter, processing steps such as boiling, do not need to add the processing medicament of strong acid or highly basic class, realized the qualified discharge of industrial wastewater, the normal temperature and pressure of having realized the pulping and paper-making reaction carries out, reduce energy consumption, reached the purpose of energy-saving and emission-reduction.
Technological principle of the present invention is: the raw material that will be added with the pulping medicament through the process of at least once compression or expansion after pulping, in the process of handling, compression or expansion by the raw material volume, form environment such as the required pressure of pulping, temperature with the heat release of chemical reaction, thereby finally finish the pulping of raw material.Owing to adopted a such process, make the process of raw material pulping can finish at normal temperatures and pressures, do not need special press device and heater, greatly reduce the energy consumption of production and to the pollution of environment.
Its concrete treatment process is:
The continuous feeding of pretreated raw material included in the reaction unit of at least one pulping section, and in the process of raw material motion, add the pulping medicament.
The raw material motion of can spinning in equipment in order to reach this purpose, has spiral pushing device in the consersion unit, perhaps other can realize the reaction unit of material helical feed.Because raw material has adopted the mode of screw propulsion, realized the process of the compression or the expansion of raw material, make between dry and dry in the raw material, dry and equipment room rub, thereby reached the fibrous matter refinement that under the effect of chemical agent, makes in the dry, separate, finally become the paper pulp that can industry uses, after adopting this mode simultaneously, the refinement that contained moisture and the agent of preimpregnation demulcen also can better participate in fibrous matter in the mixed material and decompose, so just under the situation that does not cause extra pollution, accelerated the pulping speed of raw material, reduced pollution for environment.Because the mode of screw propulsion is comparatively convenient feasible, when using screw propulsion, can in raw material, form pressure differential simultaneously, can better reach the purpose of pulping like this, the equipment that is adopted is production and processing easily also, therefore generally selects for use and add spiral pushing device in consersion unit.
Preliminary treatment mainly comprises: soak in advance and shear, pre-method of soaking into is directly to send containing the raw material that can become pulp fibres into the infuser device immersion, the soak that is adopted can adopt water or existing various pre-infiltration solution, be removed by pre-infiltration back impurities in raw materials, simultaneously because the effect of soaking into, raw fiber that makes and interfibrous space are strengthened, the soft seepage velocity for the post-processed medicament that fiber itself becomes has had tangible quickening, has made things convenient for the processing in later stage to shorten the required time of subsequent treatment; In order to reach better effect, also can shear raw material, generally raw material is cut into the segment of 5-8cm, can reduce the feeding burden of reaction unit like this, the raw material of segment is easier simultaneously contacts with handling medicament, has also just accelerated the speed of reaction, has improved yield.
After preliminary treatment, need to guarantee that the concentration of raw material is 15-35%, that is to say in the mixed material per ton, the shared weight of dry should be 150-350kg, when concentration less than 15% the time, the concentration of formed mixed material liquid is low excessively, does not reach the effect of expectation during processing, the white slurry concentration of final gained is low excessively, can't effectively be utilized; When concentration greater than 35%, the too high levels of hay, can in the process of raw material motion, increase the burden of propulsive mechanism like this, improve the processing energy consumption of Unit Weight raw material, reduced the service life of equipment, fiber separation effect in the raw material reduces greatly simultaneously, and the beating degree of the white slurry of gained can't reach into the requirement of paper technology, and therefore the dry concentration with raw material is controlled at 15-35%.
Described pulping section comprises:
(1) raw material crushing compression section; Reaction temperature in this section is 20-60 ℃, and the compression ratio of raw material is 3-4: 1, and preferred 3-3.3: 1; The processing medicament that adds in this pulping section is the alkalescent treatment fluid, and as sodium bicarbonate or sodium metasilicate or other weakly alkaline solution, the consumption of this alkalescent treatment fluid is the 2-6% of dry weight in the mixed material;
In this step pulping section, because the squeezing action of consersion unit, the squeezing action of stock yard, make 15-20 ℃ of the temperature rising of whole material system, because the temperature of raw material itself is the place normal temperature in season, therefore the material system temperature after handling by this step is elevated to 20-60 ℃, simultaneously because the existence of squeezing action makes raw material be compressed, the general selection is controlled at 3-4 with the compression ratio of raw material: 1, preferred 3-3.3: 1, refinement takes place in crude fibre material wherein under the effect of pressure, interfibrous adhesion descends; Add the refinement that weakly alkaline solution can add fastfiber, remove some impurity that contain in the raw material simultaneously, improve the purity of material system, because the material system of this moment is relatively more fragile, therefore can not use strong alkaline substance to be handled, the consumption of weakly alkaline solution is also unsuitable excessive simultaneously, consumption is crossed conference and is caused excessive refinement, make fineness and the length of fiber can't reach into the standard of paper, can cause the pH value of material system to raise simultaneously, alkaline bigger than normal in the post-processed liquid increased the intractability for these liquid; Consumption is too small little for whole system influence, therefore its consumption is controlled at the 2-6% of dry weight in the mixed material the most at last, long-term experiment through the inventor, the effect of sodium bicarbonate or sodium metasilicate was better when the alkalescent treatment fluid was selected in discovery for use, therefore preferred these two kinds of solution also can adopt other weakly alkaline solutions according to operating position.
Through behind this processing section, raw material gradually becomes the form of slurry by the mixed system of dry with pre-infiltrate, and its beating degree reaches 5-15, thereby provides advantageous conditions for the back goes on foot to handle.
(2) section is regulated in expansion: the reaction temperature in this section is 40-70 ℃, and the compression ratio of raw material is 1.5-2.5: 1, and preferred 1.9-2.2: 1; The processing medicament of regulating the section interpolation in this expansion mainly comprises: strong basicity is handled medicament, is mainly clorox, and its consumption is the 3-10% of dry weight in the mixed material;
In this step pulping section, because the compression ratio of consersion unit is by the 3-4 in last step: 1 reduces to 1.5-2.5: 1, though raw material still can be compressed, but comparing to have played with the last step unfolds effect, make raw material be scattered by fluffy, because interfibrous adhesion descends in the raw material through the processing of last step, when the volume of raw material increases, the crude fibre in the raw material is disintegrated each other, obtain more refinement fiber, thereby improved the effect of handling, volume increases the also increase thereupon of interfibrous space, back simultaneously, thereby the medicament that adds for this step provides more areas that contact with fiber, has improved the treatment effect of medicament; In this step processing procedure, in order to improve the yield of fiber, the medicament of selecting for use is that strong basicity is handled medicament, the main clorox that adopts, because clorox also has stronger oxidisability when having alkalescence, fibrous refinement is separated, oxidizable substance in the material is removed, improve the purity of slurry, simultaneously because the process of clorox and raw material reaction is the process of an exothermic reaction, therefore the intensification for raw material provides condition, has created better condition for temperature further improves; For the effect that makes processing can reach best, the consumption that can control strong basicity processing medicament is the 3-10% of dry weight in the mixed material, too high meeting causes the oxidation of part fiber, reduce yield, consumption is crossed to hang down and then can't effectively be improved yield, therefore amount ranges is controlled in the above-mentioned scope.
Through behind this processing section, the approaching more and slurry of material system, its whiteness has reached the standard of elementary white slurry, is 40-50, and the beating degree of material system is also brought up to 17-19.
(3) second-compressed section: the reaction temperature in this section is 65-95 ℃, and in this pulping section, the compression ratio of raw material is 1.9-2.9: 1, and preferred 2.5-2.8: 1; The processing medicament that adds in the compression section mainly comprises acid oxidizer containing chlorine, and as acid oxidizer containing chlorines such as calcium chlorates, the consumption of this processing medicament is the 3-10% of dry weight in the mixed material;
In this step pulping section, because the last treatment step of compression ratio of consersion unit has had lifting, from and played stronger squeezing action, the material system that the last step discongests out is compressed again, compression by this step, make the temperature of system get a promotion again, temperature has reached 65-95 ℃, beginning is near the temperature of pulping, decompose the long fiber that has obtained some refinements owing to crude fibre in the reaction of last step has obtained refinement, therefore through after the processing of this step, these fibers can further be fractured into staple fibre under the effect of pressure, thereby meet in the pulping requirement for fibre length, simultaneously further make fibrous refinement,, be typically chosen in this pulping section in order to reach this effect, the compression ratio of raw material is 1.9-2.9: 1, and preferred 2.5-2.8: 1; In the process of extruding, handle that medicament is compulsory to contact with raw fiber, make the refinement and the truncated process of fiber effective more rapidly, handle medicament owing to added strong basicity in the last step simultaneously, what therefore adopt in this step is acid oxidizer containing chlorine, can make like this in the system pH more near with neutrality, prevent that the liquid in the material system in later stage from becoming strong alkaline liquid, reduced the intractability in later stage, chloride oxidant is existing oxidant comparatively commonly used, therefore go in this step treatment process, generally select acid calcium chlorate or calcium hypochlorite for use, same in order to make the pH value in the material system, and the efficient of handling balance comparatively, the consumption of this acidic treatment medicament is the 3-10% of dry weight in the mixed material;
Through behind this processing section, material system has approached slurry, and its whiteness near the standard of standard white slurry, is 60-65, and the beating degree of material system is also brought up to 20-22.
(4) secondary is regulated section: the reaction temperature in this section is 90-120 ℃, and in this pulping section, the compression ratio of raw material is 1-2: 1, and preferred 1-1.2: 1; The processing medicament of regulating the section interpolation in this reexpansion mainly comprises: strong oxidizer, and as ammonium persulfate or other peroxide (hydrogen peroxide etc.), its consumption is the 3-10 ‰ of dry weight in the mixed material;
Material system through first three step processing, its every index has begun to approach the index of standard slurry, therefore excessive compression need do not carried out, only need carry out the part adjustment, compression ratio can be controlled at 1-2: 1, preferred 1-1.2: 1, if carrying out strong acid or strong basicity simultaneously once more handles, can make the fiber that obtains by excessive refinement and fracture, thereby cause the fiber in the gained slurry meticulous, can't reach into the standard of paper, thus this step handle and to be mainly cessation reaction, prevent the generation of above-mentioned situation, in order to reach this effect, added strong oxidizer as handling medicament, impurity and coloring matter etc. are further removed in the effectively continuation refinement and the fracture of barrier fibers behind the employing strong oxidizer simultaneously, improve the whiteness of material system, the strong oxidizer of herein selecting for use in general can be ammonium persulfate or other peroxide, and also oxidized in this process in order to prevent fiber, its consumption is controlled at the 3-10 ‰ of dry weight in the mixed material; Because raw material is loose by expansion again in this step processing, refinement fiber wherein can be distributed in the slurries more uniformly, thereby forms uniform slurries, the excessive gathering of fiber can not occur, has made things convenient for the processing in later stage.
Through behind this processing section, material system becomes the slurry of standard, its whiteness reaches the standard of standard white slurry, be about 68, the beating degree of material system also brings up to 25, we can say through after the processing of last step, whole material system is finished dealing with, and the substep by various medicaments adds, controlled the pH value and the harmful substance contents of whole system, made to produce to become to clean production, the cod that handles back gained waste liquid is less than 8000, colourity is 5-800 times, the cod of gained black liquor is at 70000-80000 in traditional pulping process, and colourity 6000-7000 situation has doubly had great improvement, at utmost reduced for environment damage, reached the doulbe-sides' victory of environment and benefit.Reaction temperature described in above-mentioned each step process is not represented the real time temperature in the equipment for the temperature through reaction back material system.
In order to reach the processing target in above-mentioned each step, reaction is generally carried out at the reaction unit that has spiral pushing device, and so just the motion for raw material provides power not need other auxiliary power; Simultaneously because the compression ratio difference of the pulping section of each, make the reaction pressure difference of every section pulping section, thereby provide reaction under high pressure required condition in reaction unit inside, in the raw material crushing compression section, under the effect of pressure, the crust of raw material is also broken thereupon to ftracture, and has so just made things convenient for the immersional wetting of this step pulping medicament, makes that the become fibrous matter in the raw material is better separated; In the adjusting section that expands, the compression ratio reduction is dispersed after making raw material compress, make that the processing of going up the step medicine is more thorough, pass through the process of raw material compression-dispersion simultaneously, make the new processing medicament in this step treatment step contact with raw material more uniformly, thereby reached regulating action raw material; Two step treatment process have afterwards then been carried out further processing to fibre fineness in the slurries and length emphatically, make it to reach the standard of standard white slurry, have reached the purpose of industrial use.At different disposal abilities, the treating capacity of raw material and the operational factor of equipment can be adjusted thereupon, as long as satisfy the parameters in the above-mentioned treatment step.
After adopting above-mentioned steps, reduced the step of handling than prior art, shortened the time of handling, reduced the input of equipment simultaneously, reduced production cost, more topmost is to have realized that pulping process does not have black liquor, because the substep of medicament adds, make final other liquid except that slurry can reach the standard of industrial reuse or the standard of qualified discharge, meet the related request of cleaner production.
Through after the above-mentioned treatment process, the feed liquid of gained has become the white slurry of standard, it can be sent into down the treatment process that goes on foot, as copies technology such as paper and make finished paper, or directly makes finished product and starch sale in vain.The condition of production at different manufacturers, can organically make up above-mentioned four step treatment process,, directly adopt (3) and (4) step treatment process to get final product as after raw material is carried out the refinement fragmentation, also independent assortment be can carry out according to circumstances, thereby the use and the technological improvement of more producers adapted to.
The reaction unit that includes at least one pulping section described in the above-mentioned technology, comprise the housing that has feed inlet and outlet, be installed in the spiral in the housing, and power set, housing has the drug delivery pipeline outward, the liquid outlet of transfer pipeline is positioned at housing, described spiral comprises at least one section equidistant spiral and variable-pitch propeller, the pitch difference that adjacent two sections equidistant spiral is; The lead angle of every section equidistant spiral intra vane is identical; In order to guarantee the smooth and easy of discharging, on the spiral axis body above the discharging opening, reverse acting spiral is installed, can under its effect, stop material to continue to move ahead like this, thereby discharge smoothly at discharging opening.
The equidistant spiral of (1) raw material crushing compression section wherein, its pitch is: 160-200mm, lead angle is: 9.16 °-11.44 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 10-20mm;
(2) the equidistant spiral of section is regulated in expansion, and its pitch is: 120-160mm, and lead angle is: 6.87 °-9.16 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 8-15mm;
(3) the equidistant spiral of second-compressed section, its pitch is: 140-180mm, lead angle is: 8.02 °-10.3 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 10-15mm;
(4) secondary is regulated the equidistant spiral of section, and its pitch is: 80-140mm, lead angle is: 4.59 °-8.02 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 8-15mm.
For being handled requirement per step in the technology for the compression ratio of raw material volume, corresponding setting is carried out in the parameter setting of every section spiral, can effectively material system be compressed or expand like this, in order to reach best effect, adopted above-mentioned parameter, wherein Zui Xiao pitch can not be less than 80mm, otherwise can cause compression excessive, make the running resistance of material increase, improved energy consumption, and causing production accident easily, maximum pitch is controlled at about 200mm, otherwise also can cause the thrust power deficiency of raw material.
When adopting the multistage spiral, all spirals can be installed in the same rotating shaft, be about to it and be fabricated to one, so only need provide cover power and control device to get final product, can reduce the energy consumption of equipment like this; Simultaneously also equipment can be designed to multisection type, be that the different spiral of each pitch adopts independent power-equipment and housing, connect by device for transporting objects between every section, can reduce the floor space of equipment like this, the adaptability of increase equipment and to the flexible adjustment of technology, during like this at different technology, can adapt to the requirement of technology by the order of adjusting every section equipment.
The spiral that is adopted is isometrical spiral, the footpath, the end of its spiral is 1 with the ratio of external diameter: 2.5-3.5, be preferably 1: 3, the end as spiral directly is 40cm, then the external diameter of spiral is 120cm, can reach best conveying and pulping effect like this, in order to control the speed of operation, the rotating speed of generally controlling spiral is: 10-40r/min.
The outer soup transfer pipeline of each conversion zone institute corresponding housing is an independent pipeline, has prevented from respectively to go on foot required different medicament like this and mix mutually in processing procedure, and the service efficiency that has improved medicament has also guaranteed normally carrying out of each conversion zone reaction simultaneously.
After adopting the reaction unit of this structure, because unequal distant screw has been adopted in per step reaction, make nature in the reactor formation different conversion zones, be aided with independent drug delivery pipeline, can effectively finish processing for paper making raw materials such as wheat straws, treatment effect be can not influence each other, the efficient of processing and the quality of final gained paper pulp improved.
In sum, after adopting this production technology, processing steps such as original raw material fritters, boiling have been replaced, reduced the consumption of the processing medicament of strong acid or highly basic class, and the mixing that has realized various medicaments is used, and every index has had great reduction in the feasible sewage that produces, and has realized the qualified discharge of industrial wastewater, even part of contaminated water realized the industrialization reuse, saved great amount of water resources.The normal temperature and pressure of having realized the pulping and paper-making reaction simultaneously carries out, the extra pressure and temperature equipment that provides is not provided, reduced energy consumption, reached the purpose of energy-saving and emission-reduction, the slurry that finally obtains has reached industrial application standard, promptly can directly enter the one-tenth paper technology of papermaking, also can directly sell, enrich the product diversity of enterprise; Technology itself has adaptability preferably, can carry out the selectivity adjustment according to the process condition of different manufacturers, has improved the applicability of technology.
Description of drawings
Fig. 1 is the flow chart of process implementing example 1 of the present invention;
Fig. 2 is the device structure schematic diagram in the apparatus embodiments 1 of the present invention.
1. charging apertures among the figure, 2. clutch, 3. reductor, 4. motor, 5. housing, 6. discharging opening, 7. reverse acting spiral, 8. feed liquor pipeline.
The specific embodiment
Process implementing example 1
A kind of papermaking, comprise preliminary treatment, after will containing the raw material (wheat straw) that can become pulp fibres and being cut into the segment of 6cm, directly sending into infuser device soaks, the soak that is adopted is a clear water, and the concentration that is dipped into the raw material dry is 25% to get final product, and pretreated raw material is fed continuously to include in the reaction unit of four pulping sections afterwards, and in the process of raw material motion, add the pulping medicament, described four pulping sections comprise:
(1) raw material crushing compression section; Reaction temperature in this section is 35-45 ℃, and the compression ratio of raw material is 3: 1; The processing medicament that adds in this pulping section is the alkalescent treatment fluid, sodium bicarbonate, the consumption of this alkalescent treatment fluid be in the mixed material dry weight 5.5%;
Through behind this processing section, raw material gradually becomes the form of slurry by the mixed system of dry with pre-infiltrate, and its beating degree reaches 12;
(2) section is regulated in expansion: the reaction temperature in this section is 60-65 ℃, and the compression ratio of raw material is 2: 1; The processing medicament of regulating the section interpolation in this expansion is that strong basicity is handled medicament, and clorox, its consumption are the 7-8% of dry weight in the mixed material;
Through behind this processing section, the approaching more and slurry of material system, its whiteness has reached the standard of elementary white slurry, is 45-48, and the beating degree of material system brings up to 18;
(3) second-compressed section: the reaction temperature in this section is 85-93 ℃, and the compression ratio of raw material is 2.5: 1; The processing medicament that adds in the compression section is acid oxidizer containing chlorine, and calcium chlorate, the consumption of this processing medicament are the 7-8% of dry weight in the mixed material;
Through behind this processing section, the approaching and slurry of material system, its whiteness near the standard of standard white slurry, is 64-65, the beating degree of material system also brings up to 22.
(4) secondary is regulated section: the reaction temperature in this section is 115-120 ℃, and the compression ratio of raw material is 1.1: 1, and the processing medicament of regulating the section interpolation in this reexpansion is a strong oxidizer, and hydrogen peroxide, its consumption are the 7-8 ‰ of dry weight in the mixed material;
Through behind this processing section, material system becomes the slurry of standard, and its whiteness reaches the standard of standard white slurry, is 68, and the beating degree of material system also brings up to 25, obtains finished product and starches in vain.The white slurry direct marketing of gained.
Process implementing example 2
A kind of papermaking, comprise preliminary treatment, after will containing the segment that the wheat straw raw material that can become pulp fibres is cut into 5cm, directly sending into infuser device soaks, the soak that is adopted is a clear water, and the concentration that is dipped into the raw material dry is 35% to get final product, and pretreated raw material is fed continuously to include in the reaction unit of two pulping sections afterwards, and in the process of raw material motion, add the pulping medicament, described two pulping sections comprise:
(1) raw material crushing compression section; Reaction temperature in this section is 35-45 ℃, and the compression ratio of raw material is 3.3: 1; The processing medicament that adds in this pulping section is the alkalescent treatment fluid, sodium metasilicate, the consumption of this alkalescent treatment fluid be in the mixed material dry weight 3.5%;
Through behind this processing section, raw material gradually becomes the form of slurry by the mixed system of dry with pre-infiltrate, and its beating degree reaches 8;
(2) section is regulated in expansion: the reaction temperature in this section is 60-65 ℃, and the compression ratio of raw material is 1.9: 1; The processing medicament of regulating the section interpolation in this expansion is that strong basicity is handled medicament, and clorox, its consumption are the 8-10% of dry weight in the mixed material;
Through behind this processing section, the approaching more and slurry of material system, its whiteness has reached the standard of elementary white slurry, is 46-49, and the beating degree of material system brings up to 17;
The slurry of gained enters existing shove, and existing technology such as bleaching continues to handle, and makes finished product to starch in vain, makes finished paper through copying existing technologies such as paper afterwards.
Process implementing example 3
A kind of papermaking comprises preliminary treatment, will contain the segment that is cut into 7cm after the wheat straw raw material that can become pulp fibres is cleaned, and directly sends into infuser device afterwards and soaks, and the soak that is adopted is the aqueous solution of sodium bicarbonate; Afterwards continuous feeding of pretreated raw material included in the reaction unit of two pulping sections, and add the pulping medicament in the process of raw material motion, described two pulping sections comprise:
(1) compression section: the reaction temperature in this section is 85-93 ℃, and the compression ratio of raw material is 2.8: 1; The processing medicament that adds in the compression section is acid oxidizer containing chlorine, and calcium chlorate, the consumption of this processing medicament are the 9-10% of dry weight in the mixed material;
Through behind this processing section, the approaching and slurry of material system, its whiteness near the standard of standard white slurry, is 62-63, the beating degree of material system also brings up to 22, but raw material system is acid higher.
(2) regulate section: the reaction temperature in this section is 110-115 ℃, and the compression ratio of raw material is 1.2: 1, and the processing medicament of regulating the section interpolation in this reexpansion is a strong oxidizer, and potassium peroxide, its consumption are the 9-10 ‰ of dry weight in the mixed material;
Through behind this processing section, material system becomes the slurry of standard, and the be near the mark standard of white slurry of its whiteness is 65, and the beating degree of material system also brings up to 24, obtains finished product and starches in vain.The white slurry direct marketing of gained.But the remaining liq acidity of raw material system is higher, but qualified discharge just after needing to be neutralized with alkaline matter.
Process implementing example 4
A kind of papermaking, comprise preliminary treatment, to contain and directly send into infuser device behind the segment that the cotton haulm raw material that can become pulp fibres is cut into 8cm and soak, the soak that is adopted is a saleratus solution, the concentration that is dipped into the raw material dry is 30% to get final product, afterwards continuous feeding of pretreated raw material included in the reaction unit of four pulping sections, and add the pulping medicament in the process of raw material motion, described four pulping sections comprise:
(1) raw material crushing compression section; Reaction temperature in this section is 30-50 ℃, and the compression ratio of raw material is 3.5: 1; The processing medicament that adds in this pulping section is the alkalescent treatment fluid, sodium bicarbonate, the consumption of this alkalescent treatment fluid be in the mixed material dry weight 2.5%;
Through behind this processing section, raw material gradually becomes the form of slurry by the mixed system of dry with pre-infiltrate, and its beating degree reaches 6;
(2) section is regulated in expansion: the reaction temperature in this section is 40-55 ℃, and the compression ratio of raw material is 1.5: 1; The processing medicament of regulating the section interpolation in this expansion is that strong basicity is handled medicament, and clorox, its consumption are the 3-5% of dry weight in the mixed material;
Through behind this processing section, the approaching more and slurry of material system, its whiteness has reached the standard of elementary white slurry, and for about 40-43, the beating degree of material system brings up to 17;
(3) second-compressed section: the reaction temperature in this section is 65-80 ℃, and the compression ratio of raw material is 2.8: 1; The processing medicament that adds in the compression section is acid oxidizer containing chlorine, and calcium chlorate, the consumption of this processing medicament are the 3-5% of dry weight in the mixed material;
Through behind this processing section, the whiteness of material system is 60-61, and the beating degree of material system also brings up to 20.
(4) secondary is regulated section: the reaction temperature in this section is 85-110 ℃, and the compression ratio of raw material is 1.2: 1, and the processing medicament of regulating the section interpolation in this reexpansion is a strong oxidizer, and ammonium persulfate, its consumption are the 3-5 ‰ of dry weight in the mixed material;
Through behind this processing section, the whiteness of raw material body is 65, and the beating degree of material system also brings up to 25, obtains white slurry.The white slurry of gained enters existing rear portion treatment process and makes finished paper.
Process implementing example 5
A kind of papermaking, comprise preliminary treatment, to contain the wheat straw raw material that can become pulp fibres and directly send into the infuser device immersion, the soak that is adopted is a clear water, the concentration that is dipped into the raw material dry is 25% to get final product, afterwards continuous feeding of pretreated raw material had in the reaction unit of a pulping section, and add the pulping medicament in the process of raw material motion, described pulping section is the raw material crushing compression section; Reaction temperature in this section is 35-45 ℃, and the compression ratio of raw material is 3: 1; The processing medicament that adds in this pulping section is the alkalescent treatment fluid, sodium bicarbonate, the consumption of this alkalescent treatment fluid be in the mixed material dry weight 5.5%;
Through behind this processing section, raw material gradually becomes the form of slurry by the mixed system of dry with pre-infiltrate, and its beating degree reaches 12;
Mixture of raw materials system through this one handles enters technologies such as existing stranding mill, continue to handle paper pulp.
Apparatus embodiments 1
According to process implementing example 1 described technology, the described reaction unit that includes four pulping sections, comprise the housing 5 that has charging aperture 1 and discharging opening 2, be installed in the spiral in the housing 5, and power set, power set comprise clutch 2, decelerator 3 and motor 4, outside the housing 5 drug delivery pipeline 8 are arranged, and the liquid outlet of transfer pipeline is positioned at housing, described spiral comprises four sections equidistant spiral and variable-pitch propeller, adjacent two sections equidistant helical pitch difference; The lead angle of every section equidistant spiral intra vane is identical; On the spiral axis body above the discharging opening, reverse acting spiral 7 is installed;
The equidistant spiral of (1) raw material crushing compression section wherein, its pitch is: 180mm, lead angle is: 10.3 °, variable-pitch propeller is 15mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 60mm;
(2) the equidistant spiral of section is regulated in expansion, and its pitch is: 140mm, and lead angle is: 8.02 °, variable-pitch propeller is 10mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 70mm;
(3) the equidistant spiral of second-compressed section, its pitch is: 160mm, lead angle is: 9.16 °, variable-pitch propeller is 12mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 64mm;
(4) secondary is regulated the equidistant spiral of section, and its pitch is: 120mm, lead angle is: 6.87 °, variable-pitch propeller is 15mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 103.5mm.
The spiral that is adopted is isometrical spiral, and the footpath, the end of its spiral is 1: 3 with the ratio of external diameter, and the end of spiral directly is 33cm, and then the external diameter of spiral is 100cm, and the rotating speed of spiral is: 10-20r/min.
Each conversion zone institute corresponding housing is outside equipped with independently soup carrier pipe.
Apparatus embodiments 2
According to process implementing example 2 described technologies, the described reaction unit that includes two pulping sections, comprise the housing that has feed inlet and outlet, be installed in the spiral in the housing, and power set, housing has the drug delivery pipeline outward, the liquid outlet of transfer pipeline is positioned at housing, and described spiral comprises two sections equidistant spiral and variable-pitch propeller, adjacent two sections equidistant helical pitch difference; The lead angle of every section equidistant blade is identical; On the spiral axis body above the discharging opening, reverse acting spiral is installed.
The spiral of (1) raw material crushing compression section wherein, its pitch is: 160mm, lead angle is: 9.16 °, variable-pitch propeller is 16mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 48mm;
(2) spiral of section is regulated in expansion, and its pitch is: 120mm, lead angle is: 6.87 °, variable-pitch propeller is 8mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 63mm.
The spiral that is adopted is isometrical spiral, and the footpath, the end of its spiral is 1: 2.5 with the ratio of external diameter, and the end of spiral directly is 20cm, and then the external diameter of spiral is 50cm, and the rotating speed of spiral is: 30-40r/min.
Each conversion zone institute corresponding housing is outside equipped with independently soup carrier pipe.
Apparatus embodiments 3
According to process implementing example 3 described technologies, the described reaction unit that includes two pulping sections, comprise the housing that has feed inlet and outlet, be installed in the spiral in the housing, and power set, housing has the drug delivery pipeline outward, the liquid outlet of transfer pipeline is positioned at housing, and described spiral comprises two sections equidistant spiral and variable-pitch propeller, adjacent two sections equidistant helical pitch difference; The lead angle of every section spiral intra vane is identical; On the spiral axis body above the discharging opening, reverse acting spiral is installed.
The spiral of (1) compression section wherein, its pitch is: 140mm, lead angle is: 8.02 °, variable-pitch propeller is 15mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 50mm;
The spiral of (2) adjusting section, its pitch is: 80mm, lead angle is: 4.85 °, variable-pitch propeller is 8mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 64mm;
The spiral that is adopted is isometrical spiral, and the footpath, the end of its spiral is 1: 3.5 with the ratio of external diameter, and the end of spiral directly is 10cm, and then the external diameter of spiral is 35cm, and the rotating speed of spiral is: 10-15r/min.
Each conversion zone institute corresponding housing is outside equipped with independently soup carrier pipe.
Apparatus embodiments 4
According to process implementing example 5 described technologies, the described reaction unit that includes a pulping section, comprise the housing that has feed inlet and outlet, be installed in the spiral in the housing, and power set, housing has the drug delivery pipeline outward, the liquid outlet of transfer pipeline is positioned at housing, described spiral comprises unique one section equidistant spiral and variable-pitch propeller, on the spiral axis body above the discharging opening reverse acting spiral is installed, the pitch of equidistant spiral is 200mm, and the lead angle of blade is identical, it is 11.44 °, variable-pitch propeller is 20mm for the spiral that equidistantly successively decreases, the pitch of successively decreasing, and the pitch behind the displacement is 40mm;
The spiral that is adopted is isometrical spiral, and the footpath, the end of its spiral is 1: 3 with the ratio of external diameter, and the end of spiral directly is 15cm, and then the external diameter of spiral is 45cm, and the rotating speed of spiral is: 10-15r/min.
Housing is outside equipped with unique soup carrier pipe.
Claims (10)
1. papermaking is characterized in that: the raw material that will be added with the pulping medicament through the process of at least once compression or expansion after pulping.
2. papermaking according to claim 1 is characterized in that: the continuous feeding of pretreated raw material included in the reaction unit of at least one pulping section, and add the pulping medicament in the process of raw material motion; Described pulping section comprises:
(1) raw material crushing compression section:
Reaction temperature in this section is 20-60 ℃, and in this pulping section, the compression ratio of raw material is 3-4: 1; The processing medicament that adds in this pulping section is the alkalescent treatment fluid, and the consumption of this alkalescent treatment fluid is the 2-6% of dry weight in the mixed material;
(2) section is regulated in expansion:
Reaction temperature in this section is 40-70 ℃, and in this pulping section, the compression ratio of raw material is 1.5-2.5: 1; The processing medicament of regulating the section interpolation in this expansion is that strong basicity is handled medicament, and its consumption is the 3-10% of dry weight in the mixed material;
(3) second-compressed section:
Reaction temperature in this section is 65-95 ℃, and in this pulping section, the compression ratio of raw material is 1.9-2.9: 1; The processing medicament that adds in the compression section is acid oxidizer containing chlorine, and the consumption of this processing medicament is the 3-10% of dry weight in the mixed material;
(4) secondary is regulated section:
Reaction temperature in this section is 90-120 ℃, and in this pulping section, the compression ratio of raw material is 1-2: 1; The processing medicament of regulating the section interpolation in this reexpansion is a strong oxidizer, and its consumption is the 3-10 ‰ of dry weight in the mixed material.
3. papermaking according to claim 1 and 2 is characterized in that:
Described pulping section comprises:
(1) raw material crushing compression section:
Reaction temperature in this section is 25-40 ℃, and in this pulping section, the compression ratio of raw material is 3-3.3: 1; The processing medicament that adds in this pulping section is sodium bicarbonate or sodium metasilicate, and the consumption of this alkalescent treatment fluid is the 2-6% of dry weight in the mixed material;
(2) section is regulated in expansion:
Reaction temperature in this section is 50-75 ℃, and in this pulping section, the compression ratio of raw material is 1.9-2.2: 1; The processing medicament of regulating the section interpolation in this expansion is a clorox, and its consumption is the 3-10% of dry weight in the mixed material;
(3) second-compressed section:
Reaction temperature in this section is 75-90 ℃, and in this pulping section, the compression ratio of raw material is 2.5-2.8: 1; The processing medicament that adds in the compression section is a calcium chlorate, and the consumption of this processing medicament is the 3-10% of dry weight in the mixed material;
(4) secondary is regulated section:
Reaction temperature in this section is 100-120 ℃, and in this pulping section, the compression ratio of raw material is 1-1.2: 1; The processing medicament of regulating the section interpolation in this reexpansion is hydrogen peroxide or ammonium persulfate, and its consumption is the 3-10 ‰ of dry weight in the mixed material.
4. papermaking according to claim 1 and 2 is characterized in that: raw material advances at the equipment inside spin.
5. papermaking according to claim 1 and 2 is characterized in that: the concentration of dry is controlled to be 15-35% in the pretreated raw material.
6. application rights requires the reaction unit of 1 described technological design, and comprise the housing that has charging aperture and discharging opening, be installed in the spiral in the housing, and power set, it is characterized in that: described spiral comprises at least one section equidistant spiral and variable-pitch propeller.
7. reaction unit according to claim 6 is characterized in that: the pitch of adjacent two sections equidistant spiral is unequal.
8. according to claim 6 or 7 described reaction units, it is characterized in that:
(1) the equidistant spiral of raw material crushing compression section, its pitch is: 160-200mm, lead angle is: 9.16 °-11.44 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 10-20mm;
(2) the equidistant spiral of section is regulated in expansion, and its pitch is: 120-160mm, and lead angle is: 6.87 °-9.16 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 8-15mm;
(3) the equidistant spiral of second-compressed section, its pitch is: 140-180mm, lead angle is: 8.02 °-10.3 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 10-15mm;
(4) secondary is regulated the equidistant spiral of section, and its pitch is: 80-140mm, lead angle is: 4.59 °-8.02 °, variable-pitch propeller is the spiral that equidistantly successively decreases, and the pitch of successively decreasing is 8-15mm.
9. reaction unit according to claim 8 is characterized in that: described spiral is isometrical spiral, and the footpath, the end of its spiral is 1 with the ratio of external diameter: 2.5-3.5, the rotating speed of spiral is: 10-40r/min.
10. reaction unit according to claim 6 is characterized in that: housing has the drug delivery pipeline outward, and the liquid outlet of transfer pipeline is positioned at housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100170670A CN101613971B (en) | 2008-06-25 | 2008-06-25 | Pulping and papermaking process and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100170670A CN101613971B (en) | 2008-06-25 | 2008-06-25 | Pulping and papermaking process and equipment |
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| CN101613971A true CN101613971A (en) | 2009-12-30 |
| CN101613971B CN101613971B (en) | 2011-08-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101816973A (en) * | 2010-03-05 | 2010-09-01 | 江苏大峘集团有限公司 | High-tightness continuous and uniform feeding device |
| CN105088900A (en) * | 2015-08-13 | 2015-11-25 | 合肥龙发包装有限公司 | Production method for packaging paper |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378428Y (en) * | 1999-06-24 | 2000-05-17 | 山东日东造纸机械(集团)厂 | Wheatgrass extrusion defibering machine |
| CN1267762A (en) * | 2000-04-04 | 2000-09-27 | 南智军 | Mechanical grass plants (wheat straw cornstalk, rice straw & Chinese silvergrass stalk) pulping technology |
| CN1332292A (en) * | 2001-06-14 | 2002-01-23 | 李庆刚 | Physical explosion pulping process |
| CN100347374C (en) * | 2005-08-30 | 2007-11-07 | 天津科技大学 | Fibre detaching apparatus with high shearing |
-
2008
- 2008-06-25 CN CN2008100170670A patent/CN101613971B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101816973A (en) * | 2010-03-05 | 2010-09-01 | 江苏大峘集团有限公司 | High-tightness continuous and uniform feeding device |
| CN105088900A (en) * | 2015-08-13 | 2015-11-25 | 合肥龙发包装有限公司 | Production method for packaging paper |
| CN105088900B (en) * | 2015-08-13 | 2017-01-25 | 合肥龙发包装有限公司 | Production method for packaging paper |
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