SE502916C2 - Ways to purify and recycle wastewater from a fiberboard production process - Google Patents

Ways to purify and recycle wastewater from a fiberboard production process

Info

Publication number
SE502916C2
SE502916C2 SE9303645A SE9303645A SE502916C2 SE 502916 C2 SE502916 C2 SE 502916C2 SE 9303645 A SE9303645 A SE 9303645A SE 9303645 A SE9303645 A SE 9303645A SE 502916 C2 SE502916 C2 SE 502916C2
Authority
SE
Sweden
Prior art keywords
steam
evaporator
waste water
condensate
converter
Prior art date
Application number
SE9303645A
Other languages
Swedish (sv)
Other versions
SE9303645L (en
SE9303645D0 (en
Inventor
Christer Saefstroem
Goeran Lundgren
Original Assignee
Sunds Defibrator Ind Ab
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 Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Priority to SE9303645A priority Critical patent/SE502916C2/en
Publication of SE9303645D0 publication Critical patent/SE9303645D0/en
Priority to CA 2171838 priority patent/CA2171838A1/en
Priority to JP7513160A priority patent/JPH09504473A/en
Priority to EP95900961A priority patent/EP0726879A1/en
Priority to PCT/SE1994/000990 priority patent/WO1995012549A1/en
Priority to AU10368/95A priority patent/AU678081B2/en
Publication of SE9303645L publication Critical patent/SE9303645L/en
Publication of SE502916C2 publication Critical patent/SE502916C2/en
Priority to FI961883A priority patent/FI961883A0/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0054—General arrangements, e.g. flow sheets
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

A method of purifying and recovering waste water from a fiberboard manufacturing process. The waste water is supplied to an evaporator (11), in which steam from a steam generator (12) is used as heating medium for evaporating the waste water and concentrating impurities. These impurities are thereafter separated mechanically from the evaporator (11). The steam generated in the evaporator (11) is used in a steam converter (14) for restoring the heating medium used in the evaporator (11) from condensate to steam phase. The condensate formed in the steam converter (14) is purified from solved substances in a purifying unit (15). The condensate thus purified is used as feed water in the steam generator (12), from which steam is supplied to the evaporator (11).

Description

502 916 2 centreras och avskiljs mekaniskt. Dessa föroreningar avleds från indunstaren ll genom ett utlopp 13 i form av ett för- tjockat slam. Slammet håller därvid en torrhalt som är till- räcklig för att ge ett positivt värmevärde och det kan därmed brännas exempelvis i en rosterpanna. 502 916 2 centered and mechanically separated. These pollutants are diverted from the evaporator 11 through an outlet 13 in the form of a thick sludge. The sludge then maintains a dry content which is sufficient to give a positive calorific value and it can thus burned, for example, in a roasting pan.

Det i indunstaren ll förångade avloppsvattnet leds till en ångomformare 14 som är utformad som en värmeväxlare där det förångade avloppsvattnet i motström får värma kondensatet från indunstaren 11 så att det återförs till ånga samtidigt som det förångade avloppsvattnet kondenseras. Detta kondenserade av- loppsvatten som fortfarande innehåller vattenlösliga förore- ningar förs till en reningsenhet 15 där dessa lösta substanser avskiljs, exempelvis med hjälp av omvänd osmos. Genom denna behandling renas avloppsvattnet till sådan kvalitet att det kan användas som matarvatten i ånggeneratorn 12.The waste water evaporated in the evaporator 11 is led to a steam converter 14 which is designed as a heat exchanger where it evaporated wastewater in countercurrent is allowed to heat the condensate from the evaporator 11 so that it is returned to steam at the same time evaporated wastewater is condensed. This condensed running water which still contains water-soluble to a purification unit 15 where these solutes separated, for example by reverse osmosis. Through this treatment, the wastewater is purified to such a quality that it can be used as feed water in the steam generator 12.

Den i ångomformaren 14 genererade ångan avleds genom en ledning 16 för att utnyttjas som förbrukningsånga i processen för framställning av fiberboard. Ångtrycket är därvid något lägre än ångtrycket från ånggeneratorn 12. Det utgående ång- trycket kan således vara 10 - 20 bar. Med ett ångtryck av ca 16 bar efter ånggeneratorn 12 kan ångtrycket efter ångomformaren vara ca 12 bar. Via en passage 17 med en reduceringsventil 18 leds en del av den i ånggeneratorn 12 genererade ångan direkt tillbaka till processen tillsammans med den i ångomformaren 14 genererade ångan i ledningen 16.The steam generated in the steam converter 14 is diverted through a line 16 to be used as a consumption steam in the process for the manufacture of fiberboard. The vapor pressure is then something lower than the steam pressure from the steam generator 12. The outgoing steam the pressure can thus be 10 - 20 bar. With a vapor pressure of about 16 bar after the steam generator 12, the steam pressure after the steam converter can be about 12 bar. Via a passage 17 with a reduction valve 18 part of the steam generated in the steam generator 12 is led directly back to the process together with that in the steam converter 14 generated steam in line 16.

Såväl indunstaren 11 som ångomformaren 14 är företrä- desvis konstruerade så att försmutsade värmeytor kontinuerligt rengöres mekaniskt under drift.Both the evaporator 11 and the steam converter 14 are preferred. desvis designed so that contaminated heating surfaces continuously mechanically cleaned during operation.

Den i processen erhållna avloppsvattenmängden som till- föres genom ledningen 10 är vanligtvis av samma storleksordning som behovet av matarvatten för generering av ånga i ånggenera- ratorn 12. När den tillförda avloppsvattenmängden i huvudsak motsvarar behovet av matarvatten för generering av förbruk- ningsånga erhålles balans i hela systemet för rening och åter- vinning av avloppsvatten.The amount of wastewater obtained in the process passed through line 10 is usually of the same order of magnitude as the need for feed water for the generation of steam in the steam generation ratator 12. When the amount of wastewater supplied is substantially corresponds to the need for feed water to generate consumption balance is obtained throughout the purification and recovery system. wastewater recovery.

Uppfinningen är givetvis inte begränsad till den visade utföringsformen utan kan varieras inom ramen för uppfinnings- tanken.The invention is of course not limited to the one shown embodiment but can be varied within the scope of the invention. thought.

Claims (3)

502 916 3 Patentkrav502 916 3 Patent claims 1. Sätt att rena och återvinna avloppsvatten från en process för framställning av fiberboard där avloppsvattnet tillföres en indunstare (11) i vilken ånga från en ånggenerator (12) används som värmande medium för förångning av avloppsvattnet och uppkoncentrering av föroreningar, vilka därefter avskiljs meka- niskt från indunstaren (11) k ä n n e t e c k n a t av att den i indunstaren (ll) genererade ångan används i en ångom- formare (14) för återföring av det i indunstaren (11) använda värmande mediet från kondensat till ångfas, varvid denna ånga utnyttjas som förbrukningsånga i processen, att det i ångom- formaren (14) bildade kondensatet i en reningsenhet (15) renas från lösta substanser varefter det därvid renade kondensatet används som matarvatten i ånggeneratorn (12) från vilken ånga tillföres indunstaren (11).A method of purifying and recovering waste water from a fiberboard production process in which the waste water is fed to an evaporator (11) in which steam from a steam generator (12) is used as a heating medium for evaporating the waste water and concentrating contaminants, which are then separated mechanically. from the evaporator (11) is characterized in that the steam generated in the evaporator (II) is used in a steam converter (14) for returning the heating medium used in the evaporator (11) from condensate to steam phase, this steam being used as consumption steam in the process, that the condensate formed in the steam converter (14) in a purification unit (15) is purified from solutes, after which the condensate then purified is used as feed water in the steam generator (12) from which steam is supplied to the evaporator (11). 2. Sätt enligt kravet 1, k ä n n e t e c k n a t av att en del av den i ånggeneratorn (12) genererade ångan direkt används som förbrukningsånga i processen.2. A method according to claim 1, characterized in that a part of the steam generated in the steam generator (12) is used directly as consumption steam in the process. 3. Sätt enligt kravet 1 eller 2, k ä n n e t e c k n a t av att den tillförda mängden avloppsvatten i huvudsak motsvarar behovet av matarvatten för generering av förbrukningsånga i processen.3. A method according to claim 1 or 2, characterized in that the amount of wastewater supplied substantially corresponds to the need for feed water for the generation of consumption steam in the process.
SE9303645A 1993-11-05 1993-11-05 Ways to purify and recycle wastewater from a fiberboard production process SE502916C2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE9303645A SE502916C2 (en) 1993-11-05 1993-11-05 Ways to purify and recycle wastewater from a fiberboard production process
CA 2171838 CA2171838A1 (en) 1993-11-05 1994-10-20 Method of purifying waste water
JP7513160A JPH09504473A (en) 1993-11-05 1994-10-20 Wastewater purification method
EP95900961A EP0726879A1 (en) 1993-11-05 1994-10-20 Method of purifying waste water
PCT/SE1994/000990 WO1995012549A1 (en) 1993-11-05 1994-10-20 Method of purifying waste water
AU10368/95A AU678081B2 (en) 1993-11-05 1994-10-20 Method of purifying waste water
FI961883A FI961883A0 (en) 1993-11-05 1996-05-03 Wastewater treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9303645A SE502916C2 (en) 1993-11-05 1993-11-05 Ways to purify and recycle wastewater from a fiberboard production process

Publications (3)

Publication Number Publication Date
SE9303645D0 SE9303645D0 (en) 1993-11-05
SE9303645L SE9303645L (en) 1995-05-06
SE502916C2 true SE502916C2 (en) 1996-02-19

Family

ID=20391643

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9303645A SE502916C2 (en) 1993-11-05 1993-11-05 Ways to purify and recycle wastewater from a fiberboard production process

Country Status (7)

Country Link
EP (1) EP0726879A1 (en)
JP (1) JPH09504473A (en)
AU (1) AU678081B2 (en)
CA (1) CA2171838A1 (en)
FI (1) FI961883A0 (en)
SE (1) SE502916C2 (en)
WO (1) WO1995012549A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI982737A (en) * 1998-12-17 2000-06-18 Valmet Corp Process for producing paper and / or cardboard and for energy production, as well as a production process and an industrial plant applying the procedure
CN101851041B (en) * 2010-04-27 2012-02-08 中国海诚工程科技股份有限公司 Method and device for realizing zero release in desulfuration wastewater deepening treatment
CN111701265A (en) * 2020-06-28 2020-09-25 宜宾丝丽雅股份有限公司 Evaporation system and method for acid bath treatment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239250B (en) * 1963-03-06 1967-04-20 Buckau Wolf Maschf R Evaporator with vertical heating pipes and evaporator system for the sugar industry
DE3016406C2 (en) * 1980-04-29 1985-11-28 Fried. Krupp Gmbh, 4300 Essen Multi-stage thermal material separation process with a combined vapor compressor and heat transformer to recover the heat contained in the vapors and a device for carrying out the process
FI82609C (en) * 1989-05-10 1991-04-10 Inventio Oy FOERFARANDE FOER AVDUNSTNING AV VARM VAETSKA.
AT397078B (en) * 1992-02-10 1994-01-25 Schiestl Adolf METHOD AND DEVICE FOR THERMAL HOT WATER CLEANING

Also Published As

Publication number Publication date
FI961883A (en) 1996-05-03
EP0726879A1 (en) 1996-08-21
CA2171838A1 (en) 1995-05-11
JPH09504473A (en) 1997-05-06
AU678081B2 (en) 1997-05-15
SE9303645L (en) 1995-05-06
WO1995012549A1 (en) 1995-05-11
FI961883A0 (en) 1996-05-03
SE9303645D0 (en) 1993-11-05
AU1036895A (en) 1995-05-23

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