EP0570385A1 - Procede d'alimentation de cuiseurs continus sous pression pour l'obtention de pates cellulosiques. - Google Patents
Procede d'alimentation de cuiseurs continus sous pression pour l'obtention de pates cellulosiques.Info
- Publication number
- EP0570385A1 EP0570385A1 EP92901780A EP92901780A EP0570385A1 EP 0570385 A1 EP0570385 A1 EP 0570385A1 EP 92901780 A EP92901780 A EP 92901780A EP 92901780 A EP92901780 A EP 92901780A EP 0570385 A1 EP0570385 A1 EP 0570385A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooker
- pressure
- valve
- pump
- plug
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 18
- 239000001913 cellulose Substances 0.000 title claims description 4
- 229920002678 cellulose Polymers 0.000 title claims description 4
- 238000005470 impregnation Methods 0.000 claims abstract description 15
- 238000010411 cooking Methods 0.000 claims abstract description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000002023 wood Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- 239000012978 lignocellulosic material Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 3
- 235000011837 pasties Nutrition 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 2
- 239000000835 fiber Substances 0.000 abstract description 2
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 9
- 239000010902 straw Substances 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005086 pumping Methods 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 3
- 235000009120 camo Nutrition 0.000 description 3
- 235000005607 chanvre indien Nutrition 0.000 description 3
- 239000011487 hemp Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/06—Feeding devices
Definitions
- the present invention relates to a process for the preparation of cellulosic pastes by cooking lignocellulosic materials, such as wood chips or annual plants, in a continuous pressure cooking reactor and more particularly to a process for supply to said reactor.
- the feeding systems currently used are for the most part of the following types, a - For annual plants: Continuous screws with variable or frustoconical pitch, fitted at the end with a back-pressure system.
- the system makes it possible to prevent the material from being discharged by the vapor pressure prevailing inside the cooker, generally of the order of 7 bars.
- These screws have drawbacks, namely rapid wear due to the presence of silica in the plants used (bagasse, kenaf, straw, hemp, etc.), which necessitates a frequent change of screws which must be recharged with metal and, for certain plants (in particular wet straw), a difficulty in ensuring a regular flow because the material tends to rotate with the screw and no longer.
- the systems used are of the airlock or rotary valve type. These devices operate in the following cycle. 1. A certain quantity of chips is introduced into a volume at atmospheric pressure.
- the volume is closed and subjected to a vapor pressure equal to that of the cooker.
- the volume is opened towards the cooker and the chips are poured there.
- the volume is then ready to receive a new chip load.
- Such systems have drawbacks because they are discontinuous and consequently disturb the operation of the cooker and cause a pressure drop at each cycle.
- the proposed system can be used both for annual plants and for wood chips. It is particularly well suited to continuous processes and in particular to the two-step process, as described in the French utility certificate n ° 2542 021 (see also European patent n ° 0 136 325 and American patent n ° 4 790 905).
- the continuous cooker feeding process for obtaining cellulosic pulp according to the present invention is characterized in that one introduces into a piston pump with an open cylinder head which re ⁇ flows in a piping connected to the cooker of ignocellulosic materials. 'such as wood shavings or annual plants, impregnated beforehand with chemical reagents in a quantity just necessary for their cooking and with water in sufficient quantity to obtain a pasty but non-liquid consistency.
- the seal of the cooker is ensured by a plug of material impregnated in the supply piping, which therefore does not include a valve or a sealing valve.
- the impregnation at the heart of the lignocellulose material is ensured in two phases: a) mixing of the impregnation liquor and the lignocellulose materials in proportions necessary for cooking by conventional agitation, and b) subjecting this mixture during introduction into the cooker to a high pressure, preferably of the order of 80 bars, by pressure using the piston pump with open cylinder head, which forces the penetration of the impregnation liquor at the heart of the lignocellulosic material.
- the first step of the process is impregnation, for example described in the aforementioned patents.
- the annual plant is torn to pieces of 5 to 10 cm, for example. Then it is added with hot water and alkaline or alkaline earth reagents necessary for cooking to obtain the desired quality of dough.
- these are immersed hot in a solution of alkaline or alkaline-earth reagents of a given concentration for a time sufficient to absorb in the co ⁇ skin the quantity of reagents necessary for its cooking. Then the skins are drained.
- a liquor impregnation / dry matter ratio (LI / MS) preferably equal to or close to 1.5, which can also vary according to the nature of the raw material used from 0.8 to 3.
- the second phase of the process includes injection.
- the impregnated material is injected under pressure by the open cylinder head piston pump 2 into the piping 3 connected to the cooker 1 provided with a double jacket heated by means of steam.
- the piston pump can be a double body, each piston working alternately so as to create an almost continuous or single-body flow.
- the piping 3 between the outlet of the pump and the inlet of the cooking reactor must be of a length and diameter such that the pressure drop created, thanks to the formation of a plug 4 resulting from the compression action of the pump piston, greater than the internal pressure of the reactor.
- the length of the pipe 3 and its diameter can be 3 to 3 m and 200 to 300 mm respectively.
- this flange is bolted tightly and the temperature of the cooker is adjusted to 170 ° C. by vapor pressure at 7 bars.
- the piping connecting the pump to the cooker does not have any valve or valve.
- the plug of compressed material in the supply tube is perfectly sealed.
- Example 2 The procedure is as in the previous example, using uncut barley straw in the form of 30 kg bales.
- bales of straw i.e. 300 kg soda powder 40 kg anhydrous soda ash powder 12 kg hot water spray 470 kg
- the product obtained is homogeneous and has the appearance of a wet straw.
- the impregnated straw is introduced into the cooker whose pressure is 7 bars, the duration of the introduction being
- Example 3 280 kg of ABL SALIGNA Eucalyptus 12 shavings at 92% dryness, placed in a stainless steel basket perforated with holes, are immersed in a sodium hydroxide solution containing 102.4 g / l of NaOH at 100 ° C for 30 minutes. * The chips 2.5 mm thick and 2 cm long are then removed from the solution and drained for 5 minutes. The weight of chips after impregnation is 580 kg. Using the same equipment as before, these chips are pushed into the experimental cooker whose internal pressure is 7 bars and the temperature of 170 ° C. The tube connecting the outlet of the pump to the inlet of the cooker has a length of 6 m and a diameter of 200 mm.
Landscapes
- Paper (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Noodles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9015759A FR2670512A1 (fr) | 1990-12-17 | 1990-12-17 | Systeme d'alimentation en plantes annuelles ou copeaux de bois pour un reacteur de cuisson continu sous pression destine a la production de pate cellulosique. |
| FR9015759 | 1990-12-17 | ||
| PCT/FR1991/000986 WO1992011409A1 (fr) | 1990-12-17 | 1991-12-09 | Procede d'alimentation de cuiseurs continus sous pression pour l'obtention de pates cellulosiques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0570385A1 true EP0570385A1 (fr) | 1993-11-24 |
| EP0570385B1 EP0570385B1 (fr) | 1996-04-17 |
Family
ID=9403304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92901780A Expired - Lifetime EP0570385B1 (fr) | 1990-12-17 | 1991-12-09 | Procede d'alimentation de cuiseurs continus sous pression pour l'obtention de pates cellulosiques |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5478439A (fr) |
| EP (1) | EP0570385B1 (fr) |
| CN (1) | CN1064117A (fr) |
| AU (1) | AU9128291A (fr) |
| CA (1) | CA2098493A1 (fr) |
| DE (1) | DE69118919T2 (fr) |
| ES (1) | ES2089490T3 (fr) |
| FR (1) | FR2670512A1 (fr) |
| WO (1) | WO1992011409A1 (fr) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5753075A (en) * | 1996-10-25 | 1998-05-19 | Stromberg; C. Bertil | Method and system for feeding comminuted fibrous material |
| US6106668A (en) * | 1996-10-25 | 2000-08-22 | Ahlstrom Machinery Inc. | Method for feeding comminuted fibrous material |
| CA2363158A1 (fr) * | 1999-03-02 | 2000-09-08 | Marc J. Sabourin | Preconditionnement de l'alimentation pour reduction en pate chimique |
| FI120547B (fi) * | 2004-10-04 | 2009-11-30 | Metso Paper Inc | Alkalinen keittomenetelmä ja laitteisto massan valmistamiseksi |
| US7815741B2 (en) | 2006-11-03 | 2010-10-19 | Olson David A | Reactor pump for catalyzed hydrolytic splitting of cellulose |
| US7815876B2 (en) | 2006-11-03 | 2010-10-19 | Olson David A | Reactor pump for catalyzed hydrolytic splitting of cellulose |
| SE530744C2 (sv) * | 2007-02-23 | 2008-09-02 | Metso Fiber Karlstad Ab | Ångfaskokare samt ett förfarande vid kontinuerlig kokning |
| SE532060C2 (sv) * | 2008-03-20 | 2009-10-13 | Metso Fiber Karlstad Ab | Matningssystem innefattande parallella pumpar för en kontinuerlig kokare |
| RU2540886C2 (ru) * | 2009-01-13 | 2015-02-10 | БИОГАСОЛЬ АпС. Дания | Способ и устройство для подачи материала в реактор |
| TWI392544B (zh) * | 2010-06-17 | 2013-04-11 | Atomic Energy Council | 纖維原料活塞式壓差進料裝置 |
| US10393106B2 (en) * | 2014-12-15 | 2019-08-27 | Sustainable Waste Power Systems, Inc. | Pumps, pump assemblies, and methods of pumping fluids |
| WO2017204736A1 (fr) * | 2016-05-27 | 2017-11-30 | Valmet Ab | Charge d'alcali double pour imprégnation de copeau |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2975096A (en) * | 1957-11-18 | 1961-03-14 | Bauer Bros Co | Impregnation of wood chips |
| US3041233A (en) * | 1957-12-17 | 1962-06-26 | Kamyr Ab | Method of introducing high density pulp into a pressure vessel |
| FR2542021B3 (fr) * | 1983-03-02 | 1985-11-08 | Nivelleau Bruniere Patrick M F | Procede de traitement du bois ou autre matiere ligno-cellulosique pour l'obtention de pate cellulosique - papier ou carton - produits chimiques |
| WO1984003527A1 (fr) * | 1983-03-02 | 1984-09-13 | Nivelleau Bruniere Patrick M F | Procede de traitement de matieres ligno-cellulosique pour l'obtention de cellulose. |
| SE461280B (sv) * | 1988-06-06 | 1990-01-29 | Kamyr Ab | Behandling av ett fiberhaltigt material foere kokning till massa |
-
1990
- 1990-12-17 FR FR9015759A patent/FR2670512A1/fr active Pending
-
1991
- 1991-12-09 WO PCT/FR1991/000986 patent/WO1992011409A1/fr not_active Ceased
- 1991-12-09 ES ES92901780T patent/ES2089490T3/es not_active Expired - Lifetime
- 1991-12-09 AU AU91282/91A patent/AU9128291A/en not_active Abandoned
- 1991-12-09 EP EP92901780A patent/EP0570385B1/fr not_active Expired - Lifetime
- 1991-12-09 CA CA002098493A patent/CA2098493A1/fr not_active Abandoned
- 1991-12-09 DE DE69118919T patent/DE69118919T2/de not_active Expired - Fee Related
- 1991-12-16 CN CN91112745A patent/CN1064117A/zh active Pending
-
1993
- 1993-07-20 US US08/075,476 patent/US5478439A/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9211409A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1064117A (zh) | 1992-09-02 |
| US5478439A (en) | 1995-12-26 |
| DE69118919T2 (de) | 1996-11-28 |
| EP0570385B1 (fr) | 1996-04-17 |
| CA2098493A1 (fr) | 1992-06-18 |
| DE69118919D1 (de) | 1996-05-23 |
| AU9128291A (en) | 1992-07-22 |
| WO1992011409A1 (fr) | 1992-07-09 |
| ES2089490T3 (es) | 1996-10-01 |
| FR2670512A1 (fr) | 1992-06-19 |
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