CN1091820C - Chemical mechanical pulp-making method and equipment - Google Patents
Chemical mechanical pulp-making method and equipment Download PDFInfo
- Publication number
- CN1091820C CN1091820C CN99120924A CN99120924A CN1091820C CN 1091820 C CN1091820 C CN 1091820C CN 99120924 A CN99120924 A CN 99120924A CN 99120924 A CN99120924 A CN 99120924A CN 1091820 C CN1091820 C CN 1091820C
- Authority
- CN
- China
- Prior art keywords
- district
- cover
- backpitch
- mill
- propellers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000126 substance Substances 0.000 title claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000004537 pulping Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 35
- 235000014347 soups Nutrition 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 10
- 239000002657 fibrous material Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000007598 dipping method Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 238000005842 biochemical reaction Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000005520 cutting process Methods 0.000 abstract description 2
- 239000003814 drug Substances 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 8
- 239000011295 pitch Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 241001264730 Callistemon salignus Species 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Landscapes
- Paper (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The present invention relates to a method and a device for producing chemical mechanical pulp by a double-spiral roll type pulping machine. The present invention is mainly characterized in that steam and medicine liquid are added by a liquid inlet arranged on a machine shell of the double-spiral roll type pulping machine, the raw materials with plant fiber are softened and are ground into the pulp through the push, the extrusion and the cutting of a positive spiral sleeve and a negative spiral sleeve, and hard impurity blocks entering the raw materials of the pulping machine are extruded into a discharge device arranged in the machine shell in a zone formed from a first group of positive spiral sleeves and negative spiral sleeves, and are discharged out of the machine in a fixed period; therefore, the safe and stable operation of the device can be ensured.
Description
The present invention relates to a kind of chemical mechanical pulp-making method of producing paper pulp with plant fiber material.
Grinding stone wood grinder or disc mill are generally all adopted in mechanical feedback.It is with plant fiber material, after mill is separated, isolates fiber.In the mechanical pulp that disc mill is produced, the fiber content height, performance is better than Stone Ground Wood.Chemical-mechanical pulping is with fibrous raw material, through Chemical Pretreatment, grinds the method for separating pulping again in disc mill, and the slurry of being produced is called chemi-mechanical pulp.Because Chemical Pretreatment has been softened timber, after separating, mill can isolate complete fiber morely, and the long fiber component is many, makes the indexs such as intensity of chemi-mechanical pulp be better than mechanical pulp.The disc mill that uses in the production process belongs to cutter formula fiberizer.During defibrination, fibrous raw material be subjected to the abrasive disc cutter tooth stronger cut, cut effect, fiber shortens, the strength character of slurry is affected; And the abrasive disc cutter tooth constantly is worn in the defibrination process, and the quality of slurry also therefore and constantly worsens.The disc mill abrasive disc generally is to be made by the abrasion-proof corrosion-proof metal material, and cost is higher; Its replacing has increased the cost of starching.In addition, in the defibrination process, most of energy of input disc grinding machine is converted into heat energy, and the energy that really is used for defibre only accounts for sub-fraction, and capacity usage ratio is very low.Be to reduce the cutting action of abrasive disc cutter tooth to fiber, industrial also have adopt nonmetal abrasive disc, but specific energy consumption is not seen reduction.
The objective of the invention is to overcome disc mill and grind the shortcoming of separating when chemically treated plant fiber material is produced chemi-mechanical pulp, change the mode of production of traditional chemical mechanical pulp, according to raw material and production technology needs, separate preceding or mill is separated and added steam, chemical liquid in the process at mill, make plant fiber material under low specific energy consumption, low cost, the chemi-mechanical pulp that producd fibers is long, bond strength is high.
The task that the present invention will solve is: produce the chemi-mechanical pulp that conforms with quality requirement with plant fiber material; Safe and reliable to operation for assurance equipment, the device of removing hard impurity piece should be arranged in the equipment.
The present invention seeks to realize like this: utilize Chinese utility model patent (application number: 97214188.X, Granted publication number: described double helix roller type paste mill CN 2291435Y), and being improved, finish the task that the present invention will solve.The double helix roller type paste mill belongs to no cutter formula fiberizer.It is work like this: motor drives two propellers that are installed in the housing through transmission case.For ease of detecting ruuning situation and changing screw casing, housing is a dissection type, is made up of upper casing and lower casing.Be provided with in the casing and two corresponding cavitys of propellers shape size.Upper casing one end has charging aperture, and plant fiber material enters fiberizer thus, and the other end of lower casing is a discharging opening, separates back gained slurry to discharge mill.Two propellers are engaged with each other, parallel, rotation in the same way.Propellers are overlapped by mandrel and dress several groups of right-handed screws thereon and the backpitch cover is formed.The pitch of first group of right-handed screw cover from large to small.Have several on the spiral shell rib of backpitch cover by the outside footpath down fold in axle center.Every group of right-handed screw overlaps and a slurry mill of the backpitch cover formation section of separating, and the backpitch cover is made up of the spiral piece of several helical pitches, forms the higher-pressure region during defibrination herein.In the right-handed screw section, because the engagement of screw casing, make the material power that is squeezed; In the region of engagement,, material is produced shearing force because propellers rotate in the same way.Overlap under the reverse propelling movement effect at backpitch, material accumulates gradually, is full of, and forms the higher-pressure region, and material is subjected to bigger extruding force and shear force.Material is in just propelling movement process, and the right-handed screw cover has directed extruding and conveying effect to fibre material; When the backpitch roller oppositely pushes, this orientation is arranged also.Therefore, fibre material is in high pressure defibrination district, and fiber axis is to being subjected to bigger extruding force, help fibre material at fiber axis to cracking, strengthened soup and soaked into and the fiber separation effect.Mill separate refinement material, extrude by the skewed slot of opening on the backpitch cover spiral shell rib, enter next section defibrination district.By the number and the big or small variation of skewed slot, can control soup infiltration and refining effect.Upper casing is provided with a plurality of inlets, and lower casing is provided with a plurality of leakage fluid drams.The present invention is exactly the inlet that utilizes upper casing, enters steam and soup (NaOH, the Na of the required pressure of technology
2SO
3, NaHSO
3Deng), with plant material heating, dipping, make material that chemical reaction take place in casing, softening plant fiber material.Preceding several defibrination sections mainly are to finish the reinforcement dipping of raw material; The defibrination section of back mainly is to finish the defibrination effect.Two propellers of double helix roller type paste mill rotate in the same way.It is not very sensitive to the less hard impurity piece of shape in the access arrangement.But for fear of big hard impurity piece damage equipment, the purification of fibrous raw material, the removal of impurity, the present invention is provided with the device of removing hard impurity piece before the double helix roller type paste mill first defibrination district before should strengthening access arrangement, to guarantee equipment safety operation.
Below in conjunction with accompanying drawing, describe implementation method of the present invention in detail.
Fig. 1 is the double helix roller type paste mill side view that the concrete enforcement of the present invention is adopted.
Fig. 2 is the vertical view of fiberizer among Fig. 1.
Fig. 3 is the pulp-milling mechanism vertical section sketch of fiberizer among Fig. 1.
Fig. 4 is the pulp-milling mechanism diagrammatic top view of fiberizer among Fig. 1.
Double helix roller type paste mill shown in Figure 1 is made up of motor 1, transmission case 3, upper shell 10, lower house 11, charging aperture 8, discharging opening 12 etc.
In the double helix roller type paste mill general structure vertical view shown in Figure 2, charging aperture 8, discharging opening 12, inlet 9 etc. are shown.
Two engagements, parallel, homodromal propellers 18 are housed in the housing shown in Figure 4.
During the work of double helix roller type paste mill, motor 1 drives belt pulley 2 and transmission case 3 through belt, and by axle 4 outputs, spline housing 5 links up the mandrel 7 of axle 4 and propellers, gives two propellers 18 with transmission of power with power, makes it parallel rotation in the same way.Bearing block 6 on the support 13 is supporting the mandrel 7 of propellers 18.
Raw material falls in the chamber that upper casing 11, lower casing 10 form by charging aperture 8 and the required soup of chemical reaction together.Under the right-handed screw cover 16 of material two propellers in chamber, A district pushes, move to discharging opening 12.The pitch of the right-handed screw cover 16 in the A district forms compression ratio about 2 from large to small, to strengthen the soup dipping.After finishing the preliminary dipping of soup, the part waste liquid is discharged by lower house leakage fluid dram 14.Between A district end and top, B district, material is subjected to fierce the stirring, overlaps the material and the hard impurity piece of first helical pitch spiral shell rib perforate greater than backpitch, is arrested in this.Material after form diminishes, passes first helical pitch backpitch cover spiral shell rib perforate under extruding force and shear action, enter the higher-pressure region that next helical pitch screw casing forms.Greater than the assorted piece of the hard of perforate, finally be squeezed in the set groove that removes hard impurity block assembly 15 of lower casing.After the accumulation, stripping device is discharged to it outside body.Material is reversed spiral and oppositely pushes in the B district that backpitch cover 17 forms, and forms the higher-pressure region, and material concentration reaches 30～35% herein, and issues biochemical reaction in this high concentration.When pressure acquires a certain degree, partial material is separated less than the perforate of backpitch cover sieve rib by mill, and then by passing in the hole, following current is mobile to C district.Material becomes loose expansion state by compressive state at this moment.The inlet 9 that casing 11 is offered above the district enters the Steam Heating material according to arts demand thus, also can add the required soup of reaction simultaneously.Material overlaps in the 16 spiral shell chambeies at C district right-handed screw under self-friction heat and steam heat and chemical liquid acting in conjunction, and dipping suctions soup fully, under following current pushes, chemical reaction and mill takes place separate process.Terminal in the C district, the leakage fluid dram 14 that unnecessary waste reaction solution is offered by lower casing is extruded.Then, material enters the D district that backpitch cover 17 forms.By that analogy, behind material process E, F, G, the H district, become chemi-mechanical pulp, discharged by discharging opening 12.
Upper casing 11 can be lifted by pivot 19, so that change screw casing and checkout facility operation conditions.
Claims (4)
1, a kind of method of producing chemi-mechanical pulp with the double helix roller type paste mill, employing is by motor (1), belt pulley (2), transmission case (3), axle (4), spline housing (5), bearing block (6), mandrel (7), charging aperture (8), inlet (9), upper shell (11), lower house (10), discharging opening (12), support (13), leakage fluid dram (14), remove hard impurity block assembly (15), right-handed screw cover (16), backpitch cover (17), the chemical-mechanical pulping equipment that propellers (18) are formed is the double helix roller type paste mill, separate preceding or mill is separated and added steam in the process at plant fiber material mill, chemical liquid, make plant fiber material at low specific energy consumption, down low-cost, producd fibers is long, the chemi-mechanical pulp that bond strength is high is characterized in that: plant fiber material is gone up right-hand charging aperture of opening (8) and the required soup (NaOH of chemical reaction by upper shell (11), Na
2SO
3, NaHSO
3Deng) together, enter upper shell (11), in the chamber that lower house (10) forms, under the effect of motor (1), power is through belt pulley (2), transmission case (3), axle (4), spline housing (5), mandrel (7) passes to two rotations in the same way, be engaged with each other, parallel propellers (18), be divided into A from right-to-left in the pulp-milling mechanism of double helix roller type paste mill, B, C, D, E, F, G, eight workspaces of H, under the propelling movement of the right-handed screw cover (16) of material two propellers in chamber, A district, move to discharging opening (12) end, the pitch of the right-handed screw cover (16) in the A district from large to small, form about compression ratio (2), to strengthen the soup dipping, after finishing the preliminary dipping of soup, the leakage fluid dram (14) that the part waste liquid is offered by lower house (10) below is discharged, at A district and B district intersection, material is subjected to fierce the stirring, overlap the material and the hard impurity piece of first helical pitch spiral shell rib footpath down fold greater than backpitch, hindered at this, material is under the effect of extruding force and shearing force, after form diminishes, pass first helical pitch backpitch cover (17) spiral shell rib footpath down fold, enter the higher-pressure region that next helical pitch screw casing forms, greater than the hard impurity piece of footpath down fold, finally be pressed into A district and B district intersection, be located in the groove of the hard impurity block assembly of removal (15) of lower casing (10) below; After the accumulation, stripping device is rejected to it outside body; Material is in the B district of backpitch cover (17) formation, being reversed spiral oppositely pushes, form the higher-pressure region, material concentration reaches 30～35% herein, and issue biochemical reaction in this high concentration, when pressure acquires a certain degree, partial material is separated less than backpitch cover (17) spiral shell rib footpath down fold by mill, by passing in the down fold of footpath, following current is mobile to C district; This moment, material became loose expansion state by compressive state; According to arts demand, send into the Steam Heating material at the inlet (9) that this district's upper casing (11) top is offered, also can add reaction required soup (NaOH, Na
2SO
3, NaHSO
3Deng); Material is under self-friction heat and steam heat and chemical liquid acting in conjunction, and in C district right-handed screw cover (16) spiral shell chamber, dipping suctions soup fully, under following current pushes, chemical reaction and mill takes place separate process; Terminal in the C district, the leakage fluid dram (14) that unnecessary waste reaction solution is offered by lower casing (10) below is extruded; Then, material enters the D district that backpitch cover (17) forms; By that analogy, behind material process E, F, G, the H district, made chemi-mechanical pulp, discharged by discharging opening (12).
2. produce the double helix roller type paste mill that adopts in the chemical machinery paste-making method for one kind, by motor (1), belt pulley (2), transmission case (3), axle (4), spline housing (5), bearing block (6), mandrel (7), charging aperture (8), inlet (9), upper shell (11), lower house (10), discharging opening (12), support (13), leakage fluid dram (14), remove hard impurity block assembly (15), right-handed screw cover (16), backpitch cover (17), propellers (18) are formed, it is characterized in that: the belt pulley (2) of motor (1) is fixedly connected through belt and the belt pulley (2) that is fixed on the power intake of transmission case (3), the clutch end of transmission case (3) two parallel axes (4) that have been fixedly connected, coaxial being fixedly connected in two ends of axle (4) and the same respectively spline housing of mandrel (7) (5), bearing block (6) on the support (13) is supporting two rotations in the same way of the chamber part that is positioned at upper shell (11) and lower house (10) composition, be engaged with each other, the mandrel (7) of parallel propellers (18), propellers (18) are made up of mandrel (7) and dress several groups of right-handed screw covers (16) and backpitch cover (17) thereon, the pitch of first group of right-handed screw cover (16) has on the spiral shell rib of backpitch cover (17) from large to small by the outside footpath down fold in axle center; The last right-hand charging aperture (8) that has of upper shell (11), in the going up of upper shell (11), left has inlet (9), divide A, B, C, D, E, F, eight workspaces of G, H in the pulp-milling mechanism, lower casing (10) below in A, C, E, G district has leakage fluid dram (14), is equipped with discharging opening (12) in the lower-left of pulp-milling mechanism side.
3. a kind of double helix roller type paste mill that adopts in the chemical machinery paste-making method of producing as claimed in claim 2 is characterized in that: at first group of right-handed screw cover (16) and backpitch cover (17) formation zone is that corresponding lower casing (10) below is provided with removal hard impurity block assembly (15) between A district end and the top, B district.
4. a kind of double helix roller type paste mill that adopts in the chemi-mechanical pulp of producing according to claim 3 is characterized in that: utilize the stirring of positive and negative screw casing, to be squeezed in the groove of casing setting greater than the hard impurity piece of backpitch cover (17) spiral shell rib footpath down fold, and regularly open groove, its cleaning is drained into outside the machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99120924A CN1091820C (en) | 1999-09-24 | 1999-09-24 | Chemical mechanical pulp-making method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99120924A CN1091820C (en) | 1999-09-24 | 1999-09-24 | Chemical mechanical pulp-making method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1292445A CN1292445A (en) | 2001-04-25 |
| CN1091820C true CN1091820C (en) | 2002-10-02 |
Family
ID=5281716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99120924A Expired - Fee Related CN1091820C (en) | 1999-09-24 | 1999-09-24 | Chemical mechanical pulp-making method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091820C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340715C (en) * | 2004-09-14 | 2007-10-03 | 天津科技大学 | New process for producing alkaline hydrogen peroxide mechanical pulp by double scrwe extruding method |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544752A (en) * | 2003-11-28 | 2004-11-10 | Clean pulping catalyst and process thereof | |
| US7726592B2 (en) * | 2003-12-04 | 2010-06-01 | Hercules Incorporated | Process for increasing the refiner production rate and/or decreasing the specific energy of pulping wood |
| CN100344829C (en) * | 2003-12-26 | 2007-10-24 | 华泰集团有限公司 | Technology for preparing alkali hydrogen peroxide chemical machinery pulping |
| CN101586314B (en) * | 2008-05-21 | 2012-07-11 | 杨宏 | Mechanical method for making pulp by extruding sunflower stems |
| CN102561096B (en) * | 2009-12-17 | 2015-02-11 | 宜宾丝丽雅集团有限公司 | Method for preparing wood dissolving pulp by modifying unbleached wood pulp |
| CN102864669A (en) * | 2012-09-11 | 2013-01-09 | 江苏金沃机械有限公司 | Double-screw impregnator |
| CN104831397B (en) * | 2015-05-19 | 2017-06-06 | 常州市武进华东特种纤维制造有限公司 | A kind of preparation method of acrylic fibers pulp |
| CN113897812A (en) * | 2021-10-19 | 2022-01-07 | 南京林业大学 | A high-yield pulping process with low energy consumption and high strength |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1021680A (en) * | 1996-07-02 | 1998-01-23 | Mitsumi Electric Co Ltd | Disk drive |
| CN2291435Y (en) * | 1997-04-20 | 1998-09-16 | 刘长恩 | Double-screw beating mill |
-
1999
- 1999-09-24 CN CN99120924A patent/CN1091820C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1021680A (en) * | 1996-07-02 | 1998-01-23 | Mitsumi Electric Co Ltd | Disk drive |
| CN2291435Y (en) * | 1997-04-20 | 1998-09-16 | 刘长恩 | Double-screw beating mill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340715C (en) * | 2004-09-14 | 2007-10-03 | 天津科技大学 | New process for producing alkaline hydrogen peroxide mechanical pulp by double scrwe extruding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1292445A (en) | 2001-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104120613B (en) | A wet-strength waste paper recovery and reuse chemical mechanical pulping system | |
| CN102733215B (en) | System for papermaking pulping | |
| CN104099795B (en) | A chemical-mechanical pulping method for wet-strength waste paper recovery and reuse | |
| CN1091820C (en) | Chemical mechanical pulp-making method and equipment | |
| CN103418180B (en) | A kind of centrifugal concentrator with screw extruding dehydration | |
| CN102864669A (en) | Double-screw impregnator | |
| CN1053563A (en) | Cylindrical-roll grinder | |
| CN2291435Y (en) | Double-screw beating mill | |
| CN204039825U (en) | A kind of wet strong waste paper recycling chemical-mechanical pulping system | |
| CN103643581B (en) | fine screen | |
| CN2666978Y (en) | Homodromy double-screw paper pulp mill | |
| CN221867681U (en) | Papermaking wastewater pretreatment device | |
| CN202766895U (en) | Double screw rod impregnator | |
| CN221062646U (en) | EI-TSMP (electronic mechanical pulp) double-screw extrusion mechanical pulping system based on deep pre-impregnation treatment | |
| CN1673451A (en) | Double-screw fiberizer with tooth-shape disc | |
| CN1948612A (en) | Method and device of preparing bleaching paste using bioenzyme | |
| CN2265993Y (en) | Differential speed roll pulp grinder | |
| CN213287003U (en) | Automatic processing device of mineral processing machinery | |
| CN202543712U (en) | Spiral winnowing type bagasse depithing machine | |
| CN105648818A (en) | Double-pH-value wet-strength waste paper recycling pulping method | |
| CN116040908A (en) | Deep dewatering type spiral sludge dewatering machine | |
| CN1136939C (en) | Abrading type oil and water separator for crude oil | |
| CN2637537Y (en) | Wear resistant high efficiency paper making pulp pressing device | |
| CN2300441Y (en) | Separator for high concentration slurry | |
| CN1924186A (en) | Continuous high density hydraulic pulper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20021002 Termination date: 20110924 |