DE59105982D1 - Process control system for controlling the production of pulp in a batch cooker. - Google Patents

Process control system for controlling the production of pulp in a batch cooker.

Info

Publication number
DE59105982D1
DE59105982D1 DE59105982T DE59105982T DE59105982D1 DE 59105982 D1 DE59105982 D1 DE 59105982D1 DE 59105982 T DE59105982 T DE 59105982T DE 59105982 T DE59105982 T DE 59105982T DE 59105982 D1 DE59105982 D1 DE 59105982D1
Authority
DE
Germany
Prior art keywords
digesting
pulp quality
fluid
digester
control system
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
Application number
DE59105982T
Other languages
German (de)
Inventor
Herbert Dr Furumoto
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.)
Siemens AG
Original Assignee
Siemens AG
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
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of DE59105982D1 publication Critical patent/DE59105982D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • D21C3/22—Other features of pulping processes
    • D21C3/228—Automation of the pulping processes
    • 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
    • D21C7/12—Devices for regulating or controlling

Landscapes

  • Paper (AREA)

Abstract

The object of the invention is to control the digestion in such a way that a desired pulp quality is available, as far as possible, simultaneously with the reaching of a preset digestion end point. A process control system is used for this purpose. This comprises first means which, for homogenising the starting conditions, follow up, in accordance with a set value, the quotient of the mass of at least one constituent of the digesting fluid, relative to the dry mass of wood in the digester, especially by replenishing with or stripping out at least one digesting fluid component, or by controlled draining of digesting fluid. Second means subject the digester to a pressure pulse, whereas third means avoid major temperature differences in the digester by acting on the circulation stream of the digesting fluid. Further, fourth means effect a presetting of the digesting temperature with the aid of a simulated pulp quality figure. Finally, fifth means can be provided which, at an unchanged digesting temperature, effect a fine adjustment of the digestion end point required to reach the pulp quality. For this purpose, the actual state of the digesting fluid is measured, especially by an extinction measurement, and/or the actual value of a pulp quality figure is measured. <IMAGE>
DE59105982T 1990-12-21 1991-12-17 Process control system for controlling the production of pulp in a batch cooker. Expired - Fee Related DE59105982D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4041456 1990-12-21

Publications (1)

Publication Number Publication Date
DE59105982D1 true DE59105982D1 (en) 1995-08-17

Family

ID=6421204

Family Applications (2)

Application Number Title Priority Date Filing Date
DE9017325U Expired - Lifetime DE9017325U1 (en) 1990-12-21 1990-12-21 Process control system for controlling pulp production
DE59105982T Expired - Fee Related DE59105982D1 (en) 1990-12-21 1991-12-17 Process control system for controlling the production of pulp in a batch cooker.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE9017325U Expired - Lifetime DE9017325U1 (en) 1990-12-21 1990-12-21 Process control system for controlling pulp production

Country Status (3)

Country Link
EP (1) EP0492364B1 (en)
AT (1) ATE125011T1 (en)
DE (2) DE9017325U1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0590433B1 (en) * 1992-10-02 1999-08-25 Siemens Aktiengesellschaft Control process for the production of pulp by control of pressure and temperature
ZA967695B (en) * 1995-09-15 1997-03-17 Siemens Ag Process and arrangement for monitoring the cooking of pulp
ATE189715T1 (en) * 1995-10-09 2000-02-15 Siemens Ag METHOD FOR DETERMINING THE END POINT OF PULP COOKING AND ARRANGEMENT FOR CONTROLLING THE COOKING TIME DURING PULP COOKING IN A REACTOR
US6103057A (en) * 1997-06-11 2000-08-15 Fagerlund; Bertil K. Kraft digesting process wherein a vapor interface is formed by withdrawing hot cooking liquor
DE19752442C2 (en) * 1997-11-26 2000-05-25 Siemens Ag Control device for a continuously operating cooker for the production of pulp
WO1999028548A1 (en) * 1997-11-26 1999-06-10 Siemens Aktiengesellschaft Control device for a continuos digester for the production of cellulose
DE102007036383A1 (en) * 2007-07-31 2009-02-05 Voith Patent Gmbh Controlling the duration of dissolving sulfite substances for high-yield fibers involves terminating solubilizing on reaching predefined correlation between quantity of raw material to be solubilized and sulfite content of sulfite solution

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2123497C3 (en) * 1970-05-15 1978-08-03 Mo Och Domsjoe Ab, Oernskoeldsvik (Schweden) Process for the manufacture of sulphate pulps to obtain pulps with a predetermined degree of delignification
US4239590A (en) * 1979-01-11 1980-12-16 Kamyr, Inc. Method of maintaining uniformity of fibrous material fed to a continuous digester
DD216747A1 (en) * 1983-07-07 1984-12-19 Zellstoffwerk Goerlitz Veb PROCESS FOR COOKING DEVICE ADJUSTMENT UNDER CONDUCT OF PROCESS MEASUREMENT SIZES
DE3525248C2 (en) * 1985-07-15 1997-10-16 Siemens Ag Process for controlling the manufacturing process of pulp and associated arrangement
DE3641785A1 (en) * 1986-03-31 1987-10-08 Wolfen Filmfab Veb Process for producing pulp
FI79359C (en) * 1988-01-20 1989-12-11 Kajaani Electronics Method for checking the solution of lignin in alkaline pulp boil

Also Published As

Publication number Publication date
ATE125011T1 (en) 1995-07-15
EP0492364B1 (en) 1995-07-12
DE9017325U1 (en) 1992-01-02
EP0492364A1 (en) 1992-07-01

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee