US1576970A - Method of and system for regenerating sulphurous acid and waste heat from sulphite cellulose boilers - Google Patents

Method of and system for regenerating sulphurous acid and waste heat from sulphite cellulose boilers Download PDF

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Publication number
US1576970A
US1576970A US549112A US54911222A US1576970A US 1576970 A US1576970 A US 1576970A US 549112 A US549112 A US 549112A US 54911222 A US54911222 A US 54911222A US 1576970 A US1576970 A US 1576970A
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United States
Prior art keywords
boilers
conduit
regenerating
waste heat
sulphite cellulose
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Expired - Lifetime
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US549112A
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English (en)
Inventor
Hangleiter Carl
Schneider Adolf
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.)
Zellsloff Fabrik Waldhof AG
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Zellsloff Fabrik Waldhof AG
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    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/06—Treatment of pulp gases; Recovery of the heat content of the gases; Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds

Definitions

  • CARL-HANGLEITER 0F MANNHEIMWA DHQE, AND AnoLE seHNEmEia'oE KEHL- HEIM-ON-TI-IE-DANUBE, GERMANY, ASSIGNORS To zELEsToEEEABmK WALDHOF,
  • Ourinvcntion relates to improvements in the method of and system for regenerating sulphur dioxide and waste heat from sulphite cellulose boilers,
  • this object in view our invention consists in removing and precipitating the gas and vapor from the sulphite boiler by means of fresh lye. Thereby we are enabled to reduce the pressure of the gas or vapor to a minimum, so that also the loss of acid is reduced to a minimum.
  • Fig. 1 is a diagrammatical plan view of
  • Figs. 2 and 3 are side views taken respectively on the lines 22 and 3-3 of Fig. 1.
  • our improved system comprises a set of sulphite boilers A, B, Y, and Z, conduits 4 and 5 mounted alongside the set of boilers and adapted to be connected with the top parts of the individual boilers through branch pipes a, 6 y, and 2 and valves a 6, 3 and 2 and valves 11- 12 2 and 2 a tank 7 or 9 for fresh lye adapted to be connected with the conduit 5 respectively through a valve 8 and a valve 10, a pump 11, and a pipe 12, and a tank 14 communicating with both conduits 4 and 5.
  • the tank 9 is located below the level of the pipe 5, and the lye is raised into the same by means of the pump 11. It will beunderstood t ha t ordinarily only one of the tanks 7 or 9 is provided, and where both tanks are provided only one of them need be in opera tion at a time.
  • the operation of the system is as follows: For removing the steam and sulphur dioxide 90 for example from the boilers B and'Y located near the opposite ends of'the conduits 4 and 5. the valves 7) and 7 are opened for establishing connection between the said boilers and the conduit 4, as is known'in the art. Thereby the pressure within the boilers B and Y is reduced say to 2 atn'iospheres. Now the valves 6 and 7 are closed and the valves 1) and 3 opened, so that the boilers are connected through the branch pipes 72, and y, with the conduit 5.
  • conduit 5 there flows cold freshlye from the tank 7 or 9, so that thesteam flowing into the'conduit 5 is immediately condensed and the temperature of the sulphurous acid reduced so far that it is readily absorbed by the. lye. This process is particularly et-.
  • the vertical part of the conduit 5 which is connected with the tank 14 includes a trap 13.
  • the lye flows into the tank 14, and is finally saturated to the desired degree with sulphur dioxide.
  • the volume of lyeflowing through the pipe 5 is such that the volume thereof required in a boiler takes up the necessary heat and sulphurous acid. Thereby temperatures are avoided which might cause an objectionable pressure within the conduit 5.
  • a conduit for fresh lye lying in close proximity to the boiler, on the boiler means for discharging gas and vapor directly and while still hot into said conduit, means for continuously supplying fresh lye to the conduit, and means for continuously emptying the conduit.
  • a conduit for fresh lye lying in close proximity to the boiler, on the boiler branch pipes for discharging gas and vapor directly and While still hot into said conduit, a receptacle for continuously supplying fresh lye to the conduit, and a receptacle for continuously emptying the conduit.
  • a plurality of boilers a common conduit for fresh lye mounted alongside said boilers in close proximity to the boilers, and on the boilers means for discharging 'gas and vapor directly and while still hot into said conduit.
  • a plurality of boilers a common conduit for fresh lye mounted alongside said boilers in close proximity to the boilers, on the boiler means for discharging gas and vapor directly and While still hot into said conduit, means for continuously supplying fresh lye to the conduit, and means continuously emptying the conduit.
  • a plurality of boilers a common conduit for fresh lye mounted alongside said boilers, in close proximity to the boilers, on the boiler branch pipes for discharging gas and vapor directly and While still hot into said conduit, a receptacle for contlIllOllSlY supplying fresh lye to the conduit, an the conduit.

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  • Paper (AREA)
  • Treating Waste Gases (AREA)
US549112A 1921-04-28 1922-04-03 Method of and system for regenerating sulphurous acid and waste heat from sulphite cellulose boilers Expired - Lifetime US1576970A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE350471D 1921-04-28

Publications (1)

Publication Number Publication Date
US1576970A true US1576970A (en) 1926-03-16

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ID=32965976

Family Applications (2)

Application Number Title Priority Date Filing Date
US549112A Expired - Lifetime US1576970A (en) 1921-04-28 1922-04-03 Method of and system for regenerating sulphurous acid and waste heat from sulphite cellulose boilers
US49488A Expired - Lifetime US1693983A (en) 1921-04-28 1925-08-10 Apparatus for boiling cellulose

Family Applications After (1)

Application Number Title Priority Date Filing Date
US49488A Expired - Lifetime US1693983A (en) 1921-04-28 1925-08-10 Apparatus for boiling cellulose

Country Status (4)

Country Link
US (2) US1576970A (de)
DE (2) DE350471C (de)
FR (2) FR549664A (de)
GB (1) GB239191A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747184C (de) * 1937-11-27 1944-12-16 Dr Ernst Graap Verfahren zur Wiedergewinnung der in den Ablaugen von Sulfitzellstoffkochern enthaltenen SO-Gase

Also Published As

Publication number Publication date
FR31066E (fr) 1926-11-22
GB239191A (en) 1926-01-21
DE350471C (de) 1922-03-20
US1693983A (en) 1928-12-04
FR549664A (fr) 1923-02-16
DE425195C (de) 1926-02-12

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