CN1308545C - Vertical boiling pot for paper pulp - Google Patents
Vertical boiling pot for paper pulp Download PDFInfo
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- CN1308545C CN1308545C CNB2004100573067A CN200410057306A CN1308545C CN 1308545 C CN1308545 C CN 1308545C CN B2004100573067 A CNB2004100573067 A CN B2004100573067A CN 200410057306 A CN200410057306 A CN 200410057306A CN 1308545 C CN1308545 C CN 1308545C
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Abstract
The present invention relates to a vertical boiling pot for paper pulp. The inside of a pot body comprises a steam heating pipe, one end of which is connected with an inlet port. Vapor millipores are distributed on the pipe wall of the steam heating pipe. The steam pipe is used for heating circularly, so the contradiction that in the process of heating for steaming, pulp is formed at a pot bottom, but pulp is not formed at a pot top is avoided. The integral steaming speed is enhanced, and the pulping is uniform. The output and the quality of straw pulp are enhanced, and the pot loading quantity is large. The cooking liquor with a large liquor ratio can be ensured to be normally and circularly heated, and the made pulp can be used for replacing import hardwood pulp. The pulp has the advantages of light color, high whiteness, low hardness, high strength, high folding resistance, good water filtering performance, easy beating and easy bleaching. Simultaneously, black liquor can be repeatedly and circularly used in a pulping process. The discharged black liquor of the pulp per ton can be reduced by 50%, and the water for making one ton of pulp can be saved by more than 50%.
Description
Technical field
The present invention relates to the digesting apparatus in a kind of paper pulp fabrication process, specifically, what the present invention relates to is a kind of paper pulp vertical digester that is built-in with the micropore steam pipe.
Background technology
How to utilize non-forest fibrous raw material, develop a kind of suitable pulping process route and equipment, change non-forest fibrous raw material can only produce in, the present situation of low-grade paper pulp, and can reduce the treating capacity and the intractability of waste liquid, be one of key subjects of facing of paper industry.
In the prior art, be that wheat straw fibrous raw materials such as (grass) and alkalescence or sulphate cook soup are added in the vertical digester together, feed steam, intensifications, little venting, heat up again, be incubated, carry out delignification reaction, make wheat straw (grass) and starch.Those skilled in the art knows, grass class slurrying characteristics are: fiber is short, non-fibrocyte is more, the slurrying rate is low, intensity is relatively poor, drainability is poor, especially alkaline process makes that the silicone content of black digestion liquid of wheat straw (grass) slurry is big, viscosity is high, cause the black liquid extraction difficulty, recovery rate is low, alkali recovery is low and reclaim the cost height of alkali, seriously influences wheat straw (grass) slurry alkali and reclaims; Secondly, it is the vertical digester that is provided with the upper, middle and lower filter plate in pot body cavity of quoting wood pulp factory that straw pulp mill uses vertical digester, though this digester can be realized the task to the straw pulp boiling, but have the heating that can not circulate of cooking liquor in the digester, and the upper, middle and lower double-edged fine-toothed comb is easily stopped up by straw pulp, pulp hardness is inhomogeneous, and dress pot amount is low, the problem that alkaline consumption is high.
The proposition of Chinese patent ZL01261359.2 a kind of " grass digester ", as shown in Figure 1, comprising: pot body 1, last filter plate 3 in the pot body 1, middle filter plate 2, heater 6 and circulation heat pump 11 etc., described heater can adopt the round trip tube still heater, round trip sheath tube heater or U-shaped pipe heater etc., described pot body 1 upper end is provided with charging aperture 4, upper cycling mouth 9, displacement mouth 8, pot body 1/3 to 1/2 place is provided with a liquid pumping hole 7, pot body lower end is provided with a four-way pipe 10, and three ports of other of four-way pipe 10 are respectively down circulation port 12, spurt mouth 14 and inlet 13.The main distinction of this digester and prior art is to have increased loop heating system, with the heating that can circulate to cooking liquor, and be that the mechanism of filter plate improves to double-edged fine-toothed comb, and cancelled time double-edged fine-toothed comb, though this patent has solved the cooking liquor heating that can not circulate, and double-edged fine-toothed comb is easily by the straw pulp blocking problem, but the heating steam when boiling is to be entered by the four-way pipe 10 of being located at the bottom of a pan to carry out boiling in the pot, because the top and the bottom Steam Heating is inhomogeneous, cause the bottom pulping easily, the top fiber is disassociation also, pulping not, the incomplete problem of digestion process.
Chinese patent ZL88208105.5, name is called " efficient wood pulp machine " a kind of groundwood pulp machine that is provided with a steam pipe in vertical heating tank proposed, this efficient wood pulp machine belongs to the equipment of the thermomechanical pulp in the groundwood pulp machine, the purpose that feeds steam only is to enter raw material before the mill for heating, make it softening as juggle, dogstail etc., be convenient to defibrination, its purpose and effect and boiling of the present invention are completely different, also the possibility that does not exist simple transplanting to use.
Summary of the invention
The object of the present invention is to provide a kind of novel paper pulp vertical digester, this novel paper pulp vertical digester has been avoided in the Steam Heating digestion process, the bottom of a pan pulping, and pot pushes up also the not incomplete problem of pulping and digestion process.
The present invention can be achieved in the following manner: described novel paper pulp vertical digester comprises: last filter plate, middle filter plate, heater and circulation heat pump in pot body, the pot body; Be provided with charging aperture, upper cycling mouth, displacement mouth in pot body upper end, the filter plate place is provided with a liquid pumping hole in the pot body, and pot body lower end is provided with a four-way pipe, and other three-way pipes of four-way pipe are respectively down circulation port and spurt mouth; On the pot body, also be provided with air inlet, liquid pumping hole connects heater by pipeline via the circulation heat pump, the outlet of heater connects the upper cycling mouth and the following circulation port of pot body by pipeline, key is the basic steam-heating pipe that extends the bottom from the top that the steam micropore is arranged around being provided with in the digester body, and an end of this steam-heating pipe connects steam inlet.
Described paper pulp vertical digester can be provided with 1-5 steam-heating pipe in the digester body.
Steam-heating pipe in the described novel paper pulp vertical digester, its pot body is distributed in central authorities in the pot, or is distributed in any side of pot body on cross section equably, or is evenly distributed on pot nside, and links to each other with air inlet.
Novel paper pulp vertical digester is characterized in that, any one in described steam-heating pipe straight tube or U-shaped pipe or the coil pipe.
Described novel paper pulp vertical digester is characterized in that, is distributed with a plurality of through holes on the tube wall of described steam-heating pipe.
Described novel paper pulp vertical digester is characterized in that average every meter length is evenly distributed with 50-120 through hole on the described steam-heating pipe; The diameter of described through hole is 2-6mm, is preferably 2.5-5mm.
Paper pulp vertical digester of the present invention, its air inlet can be arranged on the four-way pipe of upper end, the pot lower end of body or lower end of pot body.
The invention has the advantages that:
1, adopt vertical digester of the present invention not only to improve cooking speed, and pulping is even in the pot, improves the output and the quality of straw pulp.It is big to have dress pot amount, can guarantee the cooking liquor normal circulation heating of big liquor ratio, and prepared straw pulp paste colors is shallow, and hardness is even, good, the easy making beating of drainability, easily bleaching, yield height.
2, vertical digester of the present invention is suitable for existing fibers in grass class raw material commonly used, such as paddy and wheat grass, reed, giantreed, reed reed, awns bar etc.
For structure of the present invention, characteristics and supply and marketing thereof are further understood again, enumerate specific embodiment now and be described with reference to the accompanying drawings as follows.
Description of drawings
The existing structural representation that is used for the vertical digester of boiling grass paper pulp of Fig. 1.
Fig. 2 is the structural representation of novel vertical digester of the present invention.
Fig. 3 is the structural representation of another embodiment of novel vertical digester of the present invention.
Fig. 4 is the enlarged drawing of the steam-heating pipe of novel vertical digester of the present invention.
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples, but the present invention is not limited to this.
Fig. 2, shown in Figure 3 be the structural representation of novel vertical digester of the present invention.This vertical digester comprises: pot body 1, heater 6, circulation heat pump 11, be provided with steam-heating pipe 5 in the pot body, but 5 one of this steam-heating pipes (as shown in the figure), be a plurality of straight tubes arranged side by side or spiral coil (as shown in Figure 3) or U type pipe, this steam-heating pipe 5 links to each other with air inlet 10 on the pot body, this air inlet 10 can be located at the top or the bottom of pot body, there is the last filter plate 3 of a filtration in the tapering on the pot body, there is filter plate 2 in the drawing liquid at pot body middle part, pot body upper end is provided with charging aperture 4, upper cycling mouth 9, displacement mouth 8, the filter plate place is provided with a liquid pumping hole 7 in the pot body, and pot body lower end is equipped with a four-way pipe, and other three ports of four-way pipe are respectively: spurt mouth 14, inlet 13 and following circulation port 12.Liquid pumping hole 7 on the pot body connects heater 6 by pipeline via circulation heat pump 11, and the outlet of heater 6 connects the upper cycling mouth 9 and the following circulation port 12 of pot body by pipeline.In the diagram specific embodiment, this air inlet 10 is located on pot body bottom four-way pipe.
Wherein, this steam-heating pipe 5 is distributed in the pot, is evenly distributed with manhole (as shown in Figure 4) on the steam-heating pipe, and the diameter of through hole is 2-6mm, is preferably 2.5-5mm., average every meter distribution of lengths has 50-120 through hole.
Will be through the wheat straw of pre-preg processing, pack in the digester 1 by packer, carry out one-level washing boiling, in digester, adopt steam-heating pipe 5 heating, high temperature and high pressure steam is fed in the steam-heating pipe 5 by air inlet 10, make and be warmed up to 110 ℃, boiling 50 minutes begins liquid pumping hole 7 effluent discharges from the digester middle part, claims high concentration black liquor, be the straw pulp of part disassociation in the digester, be straw pulp intermediate product.
After finishing one-level washing boiling, enter the secondary digestion process: contain the black liquor of certain alkali concn as cooking liquor from inlet 13 continuation of digester bottom are additional, then by the gas in the top displacement mouthful 8 discharging digesters, by heater 6 hot digestion liquid wheat straw is carried out indirect, extract black liquor out to heater 6 heating with circulating pump 11, send in the digester again, kettle temperature is constantly raise, end temperature rises to 150 ℃.
At this moment, enter from digester bottom inlet 13 with 80 ℃ black liquor, constantly displace 150 ℃ hot black liquor in the digester, hot black liquor is from top displacement mouthful 8 discharges of digester, enter standby or discharging in the storage tank, this moment, hot black liquor can be made the direct emission treatment of waste liquid, also can enter in the pulping by cooking next time and reuse as maceration extract or cooking liquor after lowering the temperature.
When temperature is reduced to below 100 ℃, digesting apparatus just can carry out cold spurting, finish the secondary digestion process, straw pulp in the pot and black liquor are spurted mouthful 14 usefulness pumps from device bottom to be extracted out, enter horizontal belt wash engine or vacuum pulp washing machine, can obtain straw pulp through pulp washing, the black liquor that washes out is a cold black liquid, and it is standby also to can be used as cooking liquor.
From following two tables as can be seen, adopt the straw pulp performance of digester preparation of the present invention to prepare straw pulp, intensity, folding height, easily making beating significantly better than common process.
Adopt digester of the present invention to carry out displacement cooking gained wheat straw sheet pulp physical property
| Sequence number | Quantitative g/m 2 | Thickness mm | Tightness g/cm 3 | Tensile index N.m 2/g | Fracture length km | Burst index Kpa.m 2/g | Tear index mN.m 2/g | Beating degree ° SR |
| 1 | 64.0 | 0.13 | 0.49 | 68.9 | 7.03 | 3.9 | 4.8 | 32 |
| 2 | 59.5 | 0.12 | 0.50 | 68.4 | 6.96 | 4.0 | 4.0 | 37 |
| 3 | 60.8 | 0.14 | 0.43 | 69.4 | 7.07 | 3.6 | 4.0 | 30 |
| 4 | 59.6 | 0.12 | 0.50 | 74.2 | 7.56 | 4.2 | 4.2 | 38 |
Adopt conventional digester to carry out boiling gained Straw Pulp physical property
| Beating consistency % | The making beating revolution | Copy sheet shrinkage factor % | Tightness g/cm 3 | Folding strength is inferior | Fracture length km | Burst factor | Tear factor | Beating degree ° SR |
| Magma | 4.2 | 0.45 | 2 | 2.18 | 9 | 24 | 17.5 | |
| 6 | 2500 | 8.7 | 0.52 | 7 | 3.66 | 20 | 30 | 37.5 |
| 6 | 5000 | 9.0 | 0.55 | 7 | 3.81 | 23 | 29 | 44.0 |
| 6 | 10000 | 10.9 | 0.57 | 8 | 4.15 | 25 | 35 | 56.0 |
Digester of the present invention is when carrying out fibers in grass class raw material displacement cooking, and cooking liquor can the normal circulation heat temperature raising, and screen cloth does not have the phenomenon of network blocking basically, because therefore whole the intensification than very fast during boiling shortened digestion time.
Unlike the prior art be, general digester adopts the logical steam in the bottom of a pan to carry out boiling, the top and the bottom Steam Heating is inhomogeneous, causes the bottom pulping easily, the top fiber is disassociation also, pulping not, digestion process is incomplete.And digester of the present invention has been avoided this problem fully, and pulping is even in the pot, improves the output and the quality of straw pulp; Adopt the straw pulp of the straw pulp sheet pulp performance of digester preparation of the present invention significantly better than the conventional equipment preparation, prepared straw pulp can replace hardwood pulp, and paste color is shallow, whiteness is high; Hardness is low, intensity, folding height; Good, the easy making beating of drainability, easily bleaching are carried out fibers in grass class raw material displacement cooking with digester of the present invention, and cooking liquor can the normal circulation heat temperature raising, and screen cloth does not have the phenomenon of network blocking basically, and boiling heats up than very fast, the digestion time weak point.Adopt digester of the present invention, avoided some domestic pulp mill slurrying to exist the double-edged fine-toothed comb of digester seriously to stop up fully, spurt behind the boiling pulping, stick the phenomenon of grass and slurry in the pot all around.
Claims (8)
1, a kind of paper pulp vertical digester comprises the digester body, it is characterized in that in the digester body steam-heating pipe being set, and an end of this steam-heating pipe connects air intake, and the steam micropore evenly distributes in the side of steam-heating pipe.
2, paper pulp vertical digester according to claim 1, it is characterized in that described digester also comprises last filter plate, middle filter plate, heater and the circulation heat pump in pot body, be provided with charging aperture, upper cycling mouth, displacement mouth in pot body upper end, the filter plate place is provided with a liquid pumping hole in the pot body, pot body lower end is provided with a four-way pipe, and three ports of other of four-way pipe are respectively down circulation port, spurt mouth and inlet; Also be provided with air inlet on the pot body, liquid pumping hole connects heater by pipeline via the circulation heat pump, and the outlet of heater connects the upper cycling mouth and the following circulation port of pot body by pipeline.
3, paper pulp vertical digester according to claim 1 is characterized in that being provided with 1-5 steam-heating pipe in the digester body.
4,, it is characterized in that the steam-heating pipe in the described pot body is distributed in central authorities in the pot, or be distributed in any side of pot body, or be evenly distributed on pot nside, and link to each other with the air inlet of pot body according to claim 1 or 3 described paper pulp vertical digesters.
According to claim 1 or 3 described paper pulp vertical digesters, it is characterized in that 5, described steam-heating pipe is any one in straight tube or U-shaped pipe or the coil pipe.
6, according to claim 1 or 3 described paper pulp vertical digesters, it is characterized in that average every meter length is evenly distributed with 50-120 micropore on the described steam-heating pipe.
7, according to claim 1 or 3 described paper pulp vertical digesters, the diameter that it is characterized in that described micropore is 2-6mm.
8,, it is characterized in that described air inlet is on the four-way pipe of the lower end of the upper end of being located at pot body, pot body or lower end according to claim 1 or 3 described paper pulp vertical digesters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100573067A CN1308545C (en) | 2003-08-26 | 2004-08-26 | Vertical boiling pot for paper pulp |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03156410.0 | 2003-08-26 | ||
| CN03156410 | 2003-08-26 | ||
| CNB2004100573067A CN1308545C (en) | 2003-08-26 | 2004-08-26 | Vertical boiling pot for paper pulp |
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| Publication Number | Publication Date |
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| CN1616760A CN1616760A (en) | 2005-05-18 |
| CN1308545C true CN1308545C (en) | 2007-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100573067A Active CN1308545C (en) | 2003-08-26 | 2004-08-26 | Vertical boiling pot for paper pulp |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618371B (en) * | 2008-07-04 | 2011-09-28 | 高树聪 | Steam jet nozzle for boiling liquid |
| CN101691703B (en) * | 2009-04-30 | 2011-10-26 | 山东福荫造纸环保科技有限公司 | Natural-color straw pulp with improved tearing index, freeness and tensile index, and stable performance |
| CN105169424A (en) * | 2015-10-10 | 2015-12-23 | 无锡德沃精工设备有限公司 | Vertical boiling and bleaching equipment |
| CN110506903A (en) * | 2019-08-20 | 2019-11-29 | 舟山国家远洋渔业基地科技发展有限公司 | Krill steaming plant and its digesting technoloy |
| CN110699245A (en) * | 2019-11-20 | 2020-01-17 | 湖南鑫恒环境科技有限公司 | Organic household garbage treatment method and system |
| CN113081488B (en) * | 2021-03-30 | 2023-01-06 | 广东美登新材料科技有限公司 | Preparation method of composite core body of baby diaper |
| CN113969426A (en) * | 2021-11-09 | 2022-01-25 | 鄢陵乐慧实业有限公司 | Manufacturing method of absorbent kapok |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091792A (en) * | 1992-11-18 | 1994-09-07 | 卡米尔公司 | The method of continuous cooking of pulp |
| CN2320649Y (en) * | 1998-03-27 | 1999-05-26 | 西北轻工业学院 | Vertical digester for paper-making pulping |
| CN1333403A (en) * | 2001-08-30 | 2002-01-30 | 山东泉林纸业有限责任公司 | Dogstail pulp large liquor ratio circular heating replacing digestion technology and digestion equipment thereof |
| CN2504306Y (en) * | 2001-08-30 | 2002-08-07 | 山东泉林纸业有限责任公司 | Grass steaming pot |
| CN2536636Y (en) * | 2002-03-27 | 2003-02-19 | 西北轻工业学院 | Vaccum pressure digesters |
-
2004
- 2004-08-26 CN CNB2004100573067A patent/CN1308545C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091792A (en) * | 1992-11-18 | 1994-09-07 | 卡米尔公司 | The method of continuous cooking of pulp |
| CN2320649Y (en) * | 1998-03-27 | 1999-05-26 | 西北轻工业学院 | Vertical digester for paper-making pulping |
| CN1333403A (en) * | 2001-08-30 | 2002-01-30 | 山东泉林纸业有限责任公司 | Dogstail pulp large liquor ratio circular heating replacing digestion technology and digestion equipment thereof |
| CN2504306Y (en) * | 2001-08-30 | 2002-08-07 | 山东泉林纸业有限责任公司 | Grass steaming pot |
| CN2536636Y (en) * | 2002-03-27 | 2003-02-19 | 西北轻工业学院 | Vaccum pressure digesters |
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| CN1616760A (en) | 2005-05-18 |
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Denomination of invention: Vertical boiling pot for paper pulp Effective date of registration: 20140211 Granted publication date: 20070404 Pledgee: China Development Bank Co Pledgor: Shandong Quanlin Paper Industry Co. Ltd.|Shandong Fuyin Paper Environmental Technology Co. Ltd. Registration number: 2014990000101 |
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