[go: up one dir, main page]

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
condensate
waste water
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 FI961883A priority patent/FI961883A0/en
Priority to CA002171838A priority patent/CA2171838A1/en
Priority to PCT/SE1994/000990 priority patent/WO1995012549A1/en
Priority to JP7513160A priority patent/JPH09504473A/en
Priority to EP95900961A priority patent/EP0726879A1/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

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)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Paper (AREA)
  • Water Treatment By Electricity Or Magnetism (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 are centered and separated mechanically. These impurities are discharged from the evaporator ll through an outlet 13 in the form of a thickened sludge. The sludge then has a dry matter content that is sufficient to provide a positive calorific value and can thus be burned, for example, in a grate boiler.

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 wastewater evaporated in the evaporator 11 is led to a steam converter 14 which is designed as a heat exchanger where the evaporated wastewater is allowed to heat the condensate from the evaporator 11 in countercurrent so that it is converted back to steam at the same time as the evaporated wastewater is condensed. This condensed wastewater which still contains water-soluble impurities is led to a purification unit 15 where these dissolved substances are separated, for example by means of 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 consumable steam in the process for producing fiberboard. The steam pressure is then somewhat lower than the steam pressure from the steam generator 12. The outgoing steam pressure can thus be 10 - 20 bar. With a steam 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 reducing valve 18, part of the steam generated in the steam generator 12 is led directly back to the process together with the steam generated in the steam converter 14 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 preferably designed so that contaminated heating surfaces are 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 and supplied through line 10 is usually of the same order of magnitude as the need for feed water for generating steam in steam generator 12. When the amount of wastewater supplied essentially corresponds to the need for feed water for generating consumption steam, balance is achieved in the entire system for purification and recycling of wastewater.

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 embodiment shown but can be varied within the scope of the inventive concept.

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
FI961883A FI961883A0 (en) 1993-11-05 1994-10-20 Wastewater treatment process
CA002171838A CA2171838A1 (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
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
AU10368/95A AU678081B2 (en) 1993-11-05 1994-10-20 Method of purifying waste water

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
FI982737A7 (en) * 1998-12-17 2000-06-18 Valmet Corp A method for the production of paper and/or cardboard and the production of energy, as well as a production method and industrial plant that complies with the method
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 Procedure for evaporating hot liquid
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
EP0726879A1 (en) 1996-08-21
FI961883L (en) 1996-05-03
FI961883A7 (en) 1996-05-03
JPH09504473A (en) 1997-05-06
SE9303645L (en) 1995-05-06
CA2171838A1 (en) 1995-05-11
FI961883A0 (en) 1996-05-03
AU678081B2 (en) 1997-05-15
AU1036895A (en) 1995-05-23
WO1995012549A1 (en) 1995-05-11
SE9303645D0 (en) 1993-11-05

Similar Documents

Publication Publication Date Title
US4347704A (en) Thermal power plant water treatment process
US5622605A (en) Process for desalinating water while producing power
AU2008366066B2 (en) Methods and systems for processing waste water
CA2785533C (en) Waste heat driven desalination process
US7531096B2 (en) System and method of reducing organic contaminants in feed water
EP2246531A1 (en) Power plant with CO2 capture and water treatment plant
JP5992423B2 (en) Method and arrangement for separating contaminants from liquid or vapor
CA2502643A1 (en) Method and apparatus for high efficiency evaporation operation
PL190692B1 (en) Distillation process enabling to reduce quantity of resulting pollutants
WO1996032176A1 (en) Process for desalinating water while producing power
SE503351C2 (en) Process for the purification of secondary condensates in evaporation of liquor
KR102095276B1 (en) Method for recovering process wastewater from a steam power plant
US11492271B2 (en) Systems and methods for removing ammonia from an ammonia-containing liquid
CN205133216U (en) Salt -containing wastewater treatment system
DE602005005204D1 (en) MSF DISTILLATED SEALING METHOD AND DEVICE THEREFOR
JP2006021956A (en) Facility and method for dechlorinating carbonized product
SE502916C2 (en) Ways to purify and recycle wastewater from a fiberboard production process
CN104291516A (en) Oil refining and chemical sewage processing and recovering equipment and method thereof
SE504164C2 (en) Process for the purification of condensate by evaporation of effluent
CA2740060C (en) Water treatment method for heavy oil production using calcium sulfate seed slurry evaporation
JP4704743B2 (en) Process for recovering methylene chloride
JPH07503890A (en) Improved waste steam treatment method in drying using superheated steam
Yogarajachari et al. Future directions in the global rise of zero liquid discharge (ZLD) for wastewater management
SE522676C2 (en) Method and apparatus for combustion of black liquor
HK40016207A (en) Systems and methods for removing ammonia from an ammonia-containing liquid

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 9303645-7

Format of ref document f/p: F