EP1036236A1 - Verfahren und vorrichtung zur herstellung von zellstoff - Google Patents

Verfahren und vorrichtung zur herstellung von zellstoff

Info

Publication number
EP1036236A1
EP1036236A1 EP98944033A EP98944033A EP1036236A1 EP 1036236 A1 EP1036236 A1 EP 1036236A1 EP 98944033 A EP98944033 A EP 98944033A EP 98944033 A EP98944033 A EP 98944033A EP 1036236 A1 EP1036236 A1 EP 1036236A1
Authority
EP
European Patent Office
Prior art keywords
boiler
solution
screw
pulp
feeder
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
Application number
EP98944033A
Other languages
English (en)
French (fr)
Other versions
EP1036236B1 (de
Inventor
Vladimir Krotov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GBGB9719479.9A external-priority patent/GB9719479D0/en
Application filed by Individual filed Critical Individual
Publication of EP1036236A1 publication Critical patent/EP1036236A1/de
Application granted granted Critical
Publication of EP1036236B1 publication Critical patent/EP1036236B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • 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

Definitions

  • This invention relates to percolation organic solvent boiling of raw
  • Most particularly the invention relates to a unit for cellulose
  • bast-fibre plants consist of
  • the bast which comprises 20-25% of the plant
  • fibre plants such as hemp, flax, and kenaf is based on the separation of stalks
  • bleachable pulp This technology is based on pulping using aqueous organic solvent
  • AAS alcohol-based ammonia-sulphite
  • AAS pulping is unrivalled in both the selectivity and the extent of
  • lignocellulosic material chopped hemp, straw
  • a first scrubber for chemical mixing, a first scrubber to which an exhauster is connected, a
  • a hopper a feeder, a spiral conveyor, a digester, a discharge unit, a fluffer, a discharge tank, an evaporator, a flasher, a moisture trap and a
  • the delignified stock is turned into pulp under very limited mechanical action.
  • Non-condensable gases are collected without entrained air
  • Prex impregnation A small portion of the raw material within the
  • the pulping liquor is injected into the feeder apparatus
  • condition such as temperature for example that might improve this method of
  • the present invention seeks to create an improved single, closed unit
  • the unit in an embodiment must use AAS pulping technology
  • a further object of the invention is to improve the processing of the
  • the invention seeks to improve
  • Another object of the invention is to produce a unit which realises few
  • the stem having a passage through which boiler solution is injected
  • the unit is composed of two sections whereby the first
  • section for the preparation of the boiler solution comprises: a first mixing device into which water is fed, a plunger pump with adjustable inputs, a first
  • mixing device a second 'tube in tube' heat exchanger, a rotor feeder, a
  • vaporiser apparatus a first cyclone, a third casing tube heat exchanger, a
  • FIG. 1 is a schematic of the boiler solution preparation section of the
  • Figure 2 is a schematic of the section of the unit for boiling the raw
  • Figure 3 is a cross-section along the line A - A' through the input
  • Figure 4 is a cross section taken along the line B - B' through the
  • Figure 5 is a cross-section taken along line C - C through the boiler
  • Figure 6 is a cross-section taken along the line D - D' of the screw
  • Figure 7 is a 'section taken along line E - E' of the accumulation
  • Figure 8 is a section taken along the line F - F' of Figure 7.
  • the two sections that together comprise the unit are respectively
  • Figure 1 relates to the section for the preparation of the boiler solution.
  • the water is sent via the means of the plunger pump with adjustable input 7,
  • Non-purified gases also enter the first scrubber from the
  • the section for the preparation of the boiler solution is hermetic and
  • the first scrubber 3 works under raised pressure.
  • the first scrubber 3 works under atmospheric
  • the weak solution from the first scrubber 3 goes via the pump 7b
  • temperature of the solution is no more than 20°.
  • Sulphur dioxide is fed into the second scrubber 4 from the tank
  • Sulphur dioxide feeding is also provided for the scrubber 3 as well.
  • the scrubber 4 is also supplied with ammonia water for irrigation from the
  • the output tank 6 by the pump 7c.
  • the output tank 6 is equipped with injectors,
  • the solution from the second scrubber 4 is fed by the pump 7d to the
  • Figure 2 shows the section of the unit for the boiling down of the raw
  • plant material typically composed of ground down hemp stock from the
  • the raw 'material comes from storage into the input bunker 8.
  • the input bunker 8 is situated
  • the input bunker 8 itself is illustrated in Figure 3. It is equipped with a
  • stirring device 80 which prevents raw material from getting stuck, as well as
  • the stirring device 80 is
  • the number of arms of the stirring device 81 is not limited to the two
  • a thyristor converter serves as a control over
  • the input bunker 8 will have a
  • the raw material is efficiently pressed before passing out of the bunker 8.
  • productivity of bunker 8 is within the range of 3.7 to 10.0 cubic metres / hour.
  • the pressed raw plant material is loaded from the input bunker 8
  • the purpose of the feeder 9 is to further regulate the
  • the feeder 9 consists of cylindrical and conical parts, as
  • the boiler solution is fed through the hollow shaft 92 in the spiral
  • the solution from 2a passes through the heat exchanger 5a, where it is heated to temperature of 75°C.
  • screw 90 determines the efficiency of compression of the raw material.
  • the throughput of the feeder 9 is maintained at a
  • the material is further improved by the hole in the centre of the plug generated
  • the feeder contains attachments such that different screws 90 can be
  • conical 90b parts in correspondence to the shape of the feeder 9 but can differ
  • batch of raw material will be identical and changing the prolonged stem will allow for more efficient impregnation of material that may vary in fibrous or
  • the level of the liquid is regulated by controlling the flow of the solution
  • the temperature and pressure conditions of the boiler 11 are strictly controlled The temperature is maintained at 170 ⁇ 10°C throughout the circulation of the boiler solution.
  • the working pressure of the boiler is
  • the boiler 11 is equipped with a preventive
  • Raw material in the boiler 11 is raised from the liquid and enters into
  • the shaft is rotated at about 0.53 Hz (32
  • the rate at which the pulp is raised through the boiler 11 is controlled
  • the raw material passes through a
  • spiral conveyor One important feature of the spiral conveyor is its high speed of
  • Pulp unloaded in this way passes from the spiral conveyor 12 into a
  • the pressure in the rotor feeder 13 is lower than that of the
  • boiler 11 expand on entering the rotor feeder 13 allowing for their separation and removal.
  • the rotor feeder 13 supplies the pulp into a dividing bunker 14. This is
  • the spinning speed of the pressing screw 14b can be varied which allows for greater control of both the throughput of pulp and the extent
  • closing device are set to a closed position, by which a steep decline of
  • cams 150, 151, 152 which are interchanged as illustrated. This arrangement of cams is in no way limiting. Other cams can be used, or the
  • the screw unloader 16 which serves to both unload and steam the cellulose pulp.
  • the screw unloader 16 is maintained at a pressure
  • unloader 16 is approximately 150°C but within this apparatus the temperature
  • the reservoir 18 is
  • this accumulation reservoir 18 has a 'live bottom' formed by four
  • screws have identical diameters and are divided into two sets 181, 182 each
  • the screws are driven by a motor such that they rotate at a speed of between 15 and 30 rotations per minute.
  • each screw or set of two screws could be different, or each
  • the cellulose pulp passes out of the accumulation reservoir on to a
  • the apparatus 6c which also receives the condensate from the heat exchanger
  • Used boiler solution is concentrated in a steamer apparatus 24
  • This steamer apparatus 24 is made with a
  • the temperature within the tubes is maintained about 15°C lower than the temperature in between the tubes.
  • the temperature in the tubes is set at 175 ⁇ 5°C whilst that in
  • the pressure inside the steamer apparatus is also closely controlled.
  • the pressure inside the steamer apparatus is also closely controlled.
  • the working pressure inside the tubes is set at 1.25 ⁇ 0.05MPa and that between
  • the tubes is also set at 1.25 ⁇ 0.05MPa.
  • the gases separated in the vaporiser 20b are sent through a first
  • cyclones are held at a temperature of 100°C and work at atmospheric pressure.
  • the first cyclone 31 has however a smaller working volume than the second cyclone 32 which directly relates to the relative volumes of gas circulated to
  • the condensed liquid is sent to the tank 2a and non-condensable gases
  • the second cyclone 32- is periodically unloaded from it into a helper tank.
  • the lower part of the boiler 11 is
  • the incoming solution from the boiler has a
  • the emergency tank 30 is
  • the present invention comprises two more vaporisers throughout (described as
  • the three vaporisers are of identical volume and all work at atmospheric
  • the standard equipment include the mixing
  • the automation scheme of the unit provides for blocking of the pumps when the pressure inside exceeds this
  • the basic construction material for the unit is steel and more
  • the unit could be constructed from other materials
  • the carbon steel may also be any material that has resistance to the pH conditions within the boiler.
  • the carbon steel may also be any material that has resistance to the pH conditions within the boiler.
  • the carbon steel may also be any material that has resistance to the pH conditions within the boiler.
  • the carbon steel may also be any material that has resistance to the pH conditions within the boiler.
  • the carbon steel may also be any material that has resistance to the pH conditions within the boiler.
  • the embodiment can be constructed as a highly-profitable
  • the invention has a typical
  • the unit although particularly suitable for ground hemp stocks, is not
  • kenaf are obvious alternatives. These would require a different composition of pulping liquor i.e. a different relative proportion of components and also a
  • each piece of apparatus comprising the unit will be reduced correspondingly in scale.
  • the unit is of direct importance to

Landscapes

  • Paper (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
EP98944033A 1997-09-15 1998-09-14 Verfahren zur herstellung von zellstoff Expired - Lifetime EP1036236B1 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GBGB9719479.9A GB9719479D0 (en) 1997-09-15 1997-09-15 The Krotov Pulper
GB9719479 1997-09-15
GBGB9807593.0A GB9807593D0 (en) 1997-09-15 1998-04-08 The crotov pulper
GB9807593 1998-04-08
GB9819865 1998-09-14
GB9819865A GB2329192B (en) 1997-09-15 1998-09-14 Pulp production method and apparatus
PCT/GB1998/002712 WO1999014424A1 (en) 1997-09-15 1998-09-14 Pulp production method and apparatus

Publications (2)

Publication Number Publication Date
EP1036236A1 true EP1036236A1 (de) 2000-09-20
EP1036236B1 EP1036236B1 (de) 2003-07-16

Family

ID=27269018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98944033A Expired - Lifetime EP1036236B1 (de) 1997-09-15 1998-09-14 Verfahren zur herstellung von zellstoff

Country Status (6)

Country Link
EP (1) EP1036236B1 (de)
AT (1) ATE245222T1 (de)
AU (1) AU9171298A (de)
CA (1) CA2304027A1 (de)
DE (1) DE69816478T2 (de)
WO (1) WO1999014424A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010083601A1 (en) * 2009-01-23 2010-07-29 Sunopta Bioprocess Inc. Method and apparatus for conveying a cellulosic feedstock

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060182693A1 (en) 2005-01-28 2006-08-17 Gumlink A/S Chewing gum possessing tooth cleaning effect and a teeth cleaning method
CA2638160C (en) 2008-07-24 2015-02-17 Sunopta Bioprocess Inc. Method and apparatus for conveying a cellulosic feedstock
CA2650919C (en) 2009-01-23 2014-04-22 Sunopta Bioprocess Inc. Method and apparatus for conveying a cellulosic feedstock
CA2638159C (en) 2008-07-24 2012-09-11 Sunopta Bioprocess Inc. Method and apparatus for treating a cellulosic feedstock
US8915644B2 (en) 2008-07-24 2014-12-23 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
CA2638150C (en) 2008-07-24 2012-03-27 Sunopta Bioprocess Inc. Method and apparatus for conveying a cellulosic feedstock
CA2638157C (en) 2008-07-24 2013-05-28 Sunopta Bioprocess Inc. Method and apparatus for conveying a cellulosic feedstock
US9127325B2 (en) 2008-07-24 2015-09-08 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for treating a cellulosic feedstock
CA2755981C (en) 2009-08-24 2015-11-03 Abengoa Bioenergy New Technologies, Inc. Method for producing ethanol and co-products from cellulosic biomass
DE102015108222A1 (de) * 2015-05-26 2016-12-01 Hochschule Magdeburg-Stendal Verfahren zur Abtrennung von Lignin aus Biomassen und daraus gewonnene Stoffe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673690A (en) * 1951-10-27 1954-03-30 Hercules Powder Co Ltd Method for the digestion of cellulose-bearing material
US2698789A (en) * 1954-02-08 1955-01-04 Hercules Powder Co Ltd Method for the digestion of cellulose-bearing material
GB753377A (en) * 1954-03-12 1956-07-25 Hercules Powder Co Ltd Improvements in or relating to method for the digestion of cellulose-bearing material
US3096234A (en) * 1958-10-29 1963-07-02 Nolan Continuous digesting system
DE2855052A1 (de) * 1978-12-20 1980-06-26 Nicolaus Md Papier Verfahren und vorrichtung zum kontinuierlichen aufschliessen von pflanzenfasermaterial
FR2741638B1 (fr) * 1995-11-29 1998-02-20 Clextral Procede et installation de preparation en continu d'une pate de cellulose

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9914424A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010083601A1 (en) * 2009-01-23 2010-07-29 Sunopta Bioprocess Inc. Method and apparatus for conveying a cellulosic feedstock

Also Published As

Publication number Publication date
DE69816478T2 (de) 2004-05-27
CA2304027A1 (en) 1999-03-25
ATE245222T1 (de) 2003-08-15
DE69816478D1 (de) 2003-08-21
EP1036236B1 (de) 2003-07-16
AU9171298A (en) 1999-04-05
WO1999014424A1 (en) 1999-03-25

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