EP2726416A1 - Procédé de régénération d'eaux usées et dispositif de régénération d'eau - Google Patents

Procédé de régénération d'eaux usées et dispositif de régénération d'eau

Info

Publication number
EP2726416A1
EP2726416A1 EP12743140.1A EP12743140A EP2726416A1 EP 2726416 A1 EP2726416 A1 EP 2726416A1 EP 12743140 A EP12743140 A EP 12743140A EP 2726416 A1 EP2726416 A1 EP 2726416A1
Authority
EP
European Patent Office
Prior art keywords
waste water
water
temperature
heat
evaporation
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.)
Withdrawn
Application number
EP12743140.1A
Other languages
German (de)
English (en)
Inventor
Andreas Büttner
Thomas Hammer
Cosima Sichel
Martin Tackenberg
Gernut VAN LAAK
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
Publication of EP2726416A1 publication Critical patent/EP2726416A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
    • 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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/10—Energy recovery
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/10—Photocatalysts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies

Definitions

  • the invention relates to a process for recycling of a waste water according to claim 1 and a Wasseraufberei ⁇ processing apparatus according to claim 11.
  • Aseptic packaging is a prerequisite in particular in the food ⁇ technology to ensure the durability ver ⁇ derricer food even without cooling.
  • the wet disinfection of plastic packaging such as PET bottles with diluted peracetic acid has developed in the food industry, especially in the Getränkeindust ⁇ rie to one of the standard processes used for this purpose.
  • the disinfection is carried out with aqueous Peressigklad- solution containing a mixture of typically 2000 mg per liter of peracetic acid and hydrogen peroxide in the water.
  • the object of the invention is to reduce the water consumption in industrial cleaning processes, especially in the wet disinfection of food packaging, the potential of energy savings should be given.
  • the solution of the problem consists in a method for reprocessing a wastewater according to claim 1 as in a water treatment device according to claim 8.
  • the inventive method for reprocessing of waste water from an industrial process having a specific organic ⁇ acid comprising the steps of:
  • a wastewater which originates, for example, from a rinsing process in the packaging production, introduced in a heat exchange process.
  • This is a heat exchange medium used, which is designed so that the be ⁇ acting wastewater is heated to an evaporation temperature that is between 60 ° C and the boiling point of the wastewater.
  • the heat exchange medium can be both a liquid and a gaseous medium.
  • Temperature of the heat exchange medium may be in the range in which the wastewater to be heated, but it may also have a significantly higher temperature, especially in gaseous media.
  • the amount of heat that is transferred from the heat exchange medium to the wastewater in the heat exchange process depends very much on the mass flows and also on the state of aggregation of the heat exchange medium.
  • the waste water which has the temperature described above between 60 ° C and the boiling point of the waste water, evaporated and then condensed again.
  • the effluent in the liquid and / or gaseous phase is irradiated with UV radiation during the evaporation and condensation process.
  • This UV radiation is at least partially a chemical reaction of organic sheu ⁇ re, in particular, it involves cleaning processes from the food industry to acetic acid or peracetic acid, in its basic components H 2 O (water) and a carbon ⁇ oxide.
  • the carbon oxide is preferably carbon dioxide, but the reaction can end in carbon monoxide.
  • the method according to the invention has various advantages.
  • the first advantage is that with the pre-chosen process ⁇ up to 80% of the process water used so the flushing water of the packaging, which is obtained as waste water, can be recovered again, and the process may be added again.
  • the process after the inventive method significantly less energy consuming than the cost of fresh water to process water.
  • the described method is energetically positive.
  • waste heat from industrial processes that are below 100 ° C. can also be used.
  • processes with a waste heat in this temperature range from 60 ° C to 100 ° C are not recovered, but are released to the environment. It is therefore an energy-efficient and ecological process.
  • the UV radiation used for the neutralization should preferably be short-waved, which means that preferably UV light sources based on mercury vapor lamps can be used, which have a short-wave UV radiation fraction of 254 nm and 184 nm.
  • a xenon excimer laser with a wave of 172 nm can be used.
  • Kata ⁇ catalysts for the reaction of the organic acid in water and carbon oxides.
  • Photokataly ⁇ catalysts for this purpose are particularly useful, which through the exposure to UV light OH "radicals.
  • Ti is particularly suitable as a photocatalyst in ⁇ tanoxid.
  • fresh water is prepared for an industrial process, wherein the fresh water is subjected to a high-temperature treatment of more than 100 ° C., in particular of more than 140 ° C.
  • a high-temperature disinfection will definitively eliminate all the germs possibly still present in the fresh water. tig eliminated.
  • the fresh water can be passed in advance through a condenser of the condensation device, wherein the heat of condensation is transmitted to the condenser on the Frischwas ⁇ water.
  • a further heat exchanger may be provided which removes the heat from the heated fresh water again.
  • This heat removed from the fresh water can in turn be used profitably to heat the waste water to an evaporation temperature or approximately evaporation temperature.
  • Another component of the invention is a Wasseraufbe ⁇ reitungsvoriques for reprocessing a, an or- ganic acid-containing wastewater.
  • This device comprises a waste water collecting device, and is characterized in that a heat exchanger is provided for heating the waste water to an evaporation temperature which is between 60 ° C and the boiling point of the waste water. Depending on the pressure conditions and the substances dissolved in the wastewater, the boiling point of the wastewater is usually between 95 and 110 ° C.
  • the device comprises an evaporation device, wherein the evaporation device is used for partial evaporation of the heated wastewater. After evaporation, the evaporated waste water condenses into a condenser.
  • a UV radiation device is provided which serves to irradiate the heated waste water in the liquid phase and / or in the gaseous phase, wherein a reaction of the organic acid in H 2 O and a carbon dioxide takes place.
  • FIG. 1 shows a schematic process representation for the water flow of rinsing water for rinsing packagings in the food industry according to the prior art
  • FIG. 3 shows a detailed representation of the rinse water recovery system according to FIGS.
  • FIG. 4 shows an alternative embodiment of the evaporator and UV radiation device according to FIG. 3.
  • the waste water 2 which now contains the organic acid peracetic acid or acetic acid, is collected in a waste water collecting device, this waste water collecting device is shown here schematically by a funnel. It may also be just a conduit, it does not necessarily have a corresponding catch ⁇ basin be present.
  • the wastewater 2 contaminated with an organic acid is pumped into a neutralization device 27, from a base tank a base or a liquor is added to the neutralization device 27 in such a way that the wastewater 2 therein is as neutral as possible contains pH.
  • the existing acetic acid or peracetic acid is thus neutralized with a suitable alkali or base.
  • the thus neutralized Wastewater 2 is passed as residual water 32 in the sewer.
  • the residual water 32 'of the prior art is not recycled.
  • FIG. 2 shows a water treatment device 1 in simplified form, which in this example also on the plant according to FIG 1 ba ⁇ Siert and it should also be by way of example assumed that PET bottles are disinfected with peracetic acid at this point and flushed with the fresh water 20 ⁇ who. This also takes place in a water utilization device 26, wherein wastewater 2 is obtained.
  • the wastewater 2 in FIG the waste water collecting device 8 collected and added a wastewater treatment device 28.
  • the Abwasseraufbe ⁇ reitungsvoriques 28 is shown greatly simplified in Figure 2, it includes, among other things Verdampfungsvorrich- tung 12 and a capacitor device 14, and a UV radiation device 16 (see FIG. FIG. 3).
  • the wastewater 2 is preheated by a heat exchanger 10 to a temperature which causes evaporation of the wastewater 2.
  • Evaporation is understood here to mean that water passes from the liquid phase into the gas phase, wherein the boiling point of the water is not exceeded during the evaporation.
  • waste heat from a further industrial process 46 can be used for the heat exchange process for heating the waste water 2, which would otherwise be released freely to the environment due to its relatively low temperature.
  • waste heat typically associated with tempera ⁇ temperatures between 60 ° C and 100 ° C
  • the temperature may also be typically at 400 ° C (exhaust heat from a gas turbine ⁇ ).
  • gasförmi ⁇ ge waste heat medium is supplied directly as a heat exchange medium 4 exchanger the heat 10
  • a further, not shown, heat exchange process can be interposed.
  • Gaseous heat exchange media have a lower heat transfer coefficient than liquid heat exchange media .
  • the must be considered and the required mass flows are calculated according to the available temperature from the waste heat of the process 46 accordingly.
  • This relatively low temperature from the waste heat of the process 46 can be used with the described waste water treatment ⁇ device 28 once more energetically reasonable, which in this embodiment, advantageous for the entire energy balance of the water treatment device 1 is.
  • this conversion to H 2 O and CO 2 can in principle be carried out completely, but the wastewater 2 also contains, after the wastewater treatment, still organic surfactants, which can be added to the sewerage in a residual water 32 and can not be treated.
  • the Quo ⁇ te the water treatment with the described water treatment device 1 is up to 80%.
  • the purified water 44 can be added back to the rinsing process, represented by water utilization device 26, as indicated by the arrow with the numeral 44 in FIG.
  • the purified by the described water treatment device 28 water 44 is sterilized itself and also preferably has no residues of organic acids, but for use in the food industry ei ⁇ ne additional high temperature disinfecting 24 may be required, and therefore the purified water 44 such disinfecting device 24 is added again, be ⁇ before it is again available for the flushing process.
  • FIG. 3 the water treatment device 1 schematically described in Figure 2 is shown in more detail.
  • the wastewater treatment device is shown.
  • a fresh water 20 of a reverse osmosis unit 18 is added to the thus Prepared ⁇ preparing fresh water 20 'is onsvortechnisch in a Hochtemperaturdesin Stammi- 24 to about 140 ° C to 150 ° C heated the absolute sterility of the thus treated To ensure fresh water 20 '', which is used in a water utilization device 26 as a rinse water.
  • the fresh water 20' before it is passed into the Hochtemperaturdesinfek- tion device 24, first in a condenser 15 'passed, the part of the wastewater treatment device 28 is.
  • the condenser 15 ' the fresh water 20' is preheated, as in the condensation process, which will be discussed below, by the condensation heat of condensation freely, the condenser 15 'acts as varnishtau ⁇ shear and the fresh water 20' with the Kondensati ⁇ preheating on heat.
  • the high-temperature disinfection 24 also takes place only for a very short time, which is sufficient to kill all germs from the fresh water 20 '.
  • the fresh water 20 '' which like ⁇ derum has a relatively high temperature thus obtained is subsequently sent ⁇ chd through a further heat exchanger 11, where it is cooled back to a usable for the flushing operation temperature.
  • the heat exchanger 11 and the heat exchanger 23 in the high-temperature disinfection system 24 are thus in constant exchange, so that in this process only very little Heat energy is lost.
  • the heat extracted from the fresh water 20 "in the heat exchanger 11 is still used at another point in the process, as will be discussed later.
  • the fresh water 20 " is now added to the water utilization device 26, so that, as already described several times, PET bottles are rinsed as an example.
  • the former fresh water 20 " is a wastewater contaminated with organic acid 2.
  • This wastewater 2 is collected in the waste water collecting device 8 and pumped via a pump 38 'to the wastewater treatment device 28.
  • the relatively cold wastewater 2 is initially passed through a condenser 15, whose mode of operation will be discussed later.
  • this condenser 15 releases condensation heat, which is used to heat the waste water 2.
  • the waste water 2 is sent through the aforementioned heat exchanger 11, whereby it is further heated.
  • ⁇ takes place entirely still a further heating of the waste water 2 in the heat exchanger 10, wherein a heat medium 4 in thermal contact with the waste heat of a further industrial processes ses 46 can stand.
  • the waste water 2 is heated by the heat exchangers 11 and 10 to a temperature which is between 60 ° C and the boiling point of the wastewater 2.
  • the boiling point of the waste water can fluctuate around the boiling point of pure water. It can usually Siedetempe ⁇ temperatures between 95 ° C and 110 ° C occur.
  • the preheated to this evaporation temperature wastewater 2 is then introduced into the evaporation device 12, and sprayed there.
  • the wastewater 2 lands on evaporator surfaces 34, which may be made of different materials, for example of cellulose materials.
  • the evaporator surfaces 34 are characterized in particular by the fact that they have a very large surface area based on their base area.
  • the wastewater 2 passes through evaporation in the gas phase, wherein the now present in gaseous form wastewater 2 'is introduced through the line marked 2' in the condenser device 14.
  • capacitors 15 and 15 ' are arranged their mode of action has been described already be ⁇ .
  • the wastewater 2' condenses again to water, which is now germ-free and purified. It is discharged as purified water 44 from the condenser device 14.
  • the wastewater is irradiated by a UV radiation device 16 with UV rays 6.
  • the UV radiation device can be mercury vapor lamps which generate UV rays having a wavelength of 254 nm or 184 nm.
  • Even short-wave UV radiation is generated by a xenon excimer laser, the UV radiation provided here is 172 nm.
  • short-wave UV radiation in the range mentioned causes the peracetic acid or acetic acid contained in the wastewater 2 to be converted is and is thereby converted ⁇ converts into chemical components with a higher oxidation state.
  • the ge ⁇ entire wastewater 2 can not be vaporized 34 and also depending on the quantity of the water introduced 2 into an evaporation and condensation cycle, 12 drip funnel 26 are provided in the evaporation device in which the unevaporated wastewater 2 is collected, and is pumped out of the evaporator 12 by a pump 38.
  • the thus collected wastewater 2 is also passed through the condenser 15, it is in this case again heated by the heat of condensation and passed in a further cycle through the heat exchanger 11 and 10 back into the evaporation device 12. This corresponds to the indicated in Figure 2 arrow 30, which returns a return of the wastewater 2 for repeated iterative evaporation and condensation.
  • the purified water 44 can now be returned to the rinsing process or to the water utilization device 26. There are two alternatives for this. For extremely high demands, in terms of sterility, the purified water 44 can be a further Res time of high-temperature disinfection 24 are subjected and are routed via the detour as fresh water 20 '' through the heat exchanger 11 to the water utilization device 26.
  • a direct line which is in dashed lines in Figure 44 'Darge ⁇ represents to lead to water utilization device 26 and feed this purified water 44 there directly. In this case, an energy-consuming high-temperature disinfection could be omitted.
  • FIG. 4 shows an alternative embodiment of the wastewater treatment device 28 from FIG.
  • the illustration according to FIG. 4 differs from FIG. 3 in that the UV radiation device 16 is not arranged in the evaporation device 12, but that the evaporated waste water 2 'is passed through a photocatalytic reactor 48, wherein the UV radiation device 16 are arranged in this reactor 48.
  • the UV radiation 6 thus acts on the wastewater 2 in evaporated form 2 '.
  • Photocatalysts are also used in the photocatalytic reactor 48, titanium oxide in particular being useful as the photocatalyst.
  • the waste water 2 'in vaporized form is introduced into the condenser device 14 and condensed there.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

L'invention concerne un procédé de régénération d'eaux usées (2) issues d'un processus industriel, contenant un acide organique. Ce procédé comporte les étapes suivantes : introduction des eaux usées dans un processus d'échange thermique employant un milieu d'échange thermique (4) de manière que les eaux usées (2) à traiter sont chauffées à une température comprise entre 60 °C et le point d'ébullition des eaux usées (2); évaporation partielle des eaux usées et condensation, les eaux usées (2) étant soumises à un rayonnement ultraviolet (6) dans la phase liquide et/ou gazeuse au cours du processus d'évaporation et de condensation. Ceci permet d'entraîner au moins partiellement une transformation chimique de l'acide organique en H2O et dioxyde de carbone. La partie condensée des eaux usées épurées (24) est réacheminée vers un processus industriel.
EP12743140.1A 2011-08-16 2012-08-01 Procédé de régénération d'eaux usées et dispositif de régénération d'eau Withdrawn EP2726416A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110081007 DE102011081007A1 (de) 2011-08-16 2011-08-16 Verfahren zur Wiederaufbereitung eines Abwassers und Wasseraufbereitungsvorrichtung
PCT/EP2012/064997 WO2013023911A1 (fr) 2011-08-16 2012-08-01 Procédé de régénération d'eaux usées et dispositif de régénération d'eau

Publications (1)

Publication Number Publication Date
EP2726416A1 true EP2726416A1 (fr) 2014-05-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12743140.1A Withdrawn EP2726416A1 (fr) 2011-08-16 2012-08-01 Procédé de régénération d'eaux usées et dispositif de régénération d'eau

Country Status (4)

Country Link
US (1) US20140190902A1 (fr)
EP (1) EP2726416A1 (fr)
DE (1) DE102011081007A1 (fr)
WO (1) WO2013023911A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011081015A1 (de) * 2011-08-16 2013-02-21 Siemens Aktiengesellschaft Verfahren zur Wiederaufbereitung eines Abwassers und Wasseraufbereitungsvorrichtung
US20140217036A1 (en) * 2013-02-01 2014-08-07 The Arizona Board Of Regents For And On Behalf Of Arizona State University Systems and methods for a nanoparticle photocatalyzed through-flow degradation reactor
DE102013210425A1 (de) * 2013-06-05 2014-12-11 Siemens Aktiengesellschaft Anlage und Verfahren zum Aufbereiten von Wasser
DE102013227061A1 (de) * 2013-12-23 2015-06-25 Siemens Aktiengesellschaft Verfahren zur Abtrennung von Wasser aus einem Wasser enthaltenden Fluidgemisch
DE102014225190A1 (de) 2014-12-09 2016-06-09 Siemens Aktiengesellschaft Anlage zur Einergiespeicherung und Erzeugung von elektrischem Strom
DE102016214019A1 (de) * 2016-07-29 2018-02-01 Siemens Aktiengesellschaft Vorrichtung zum Abtrennen von Produktwasser aus verunreinigtem Rohwasser und Verfahren zum Betrieb dieser Vorrichtung
DE102017208852A1 (de) 2017-05-24 2018-11-29 Siemens Aktiengesellschaft Schienenfahrzeug mit einer Vorrichtung zur Abwasserwiederaufbereitung und Verfahren zur Abwasserwiederaufbereitung eines Schienenfahrzeugs

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US4834836A (en) * 1985-08-29 1989-05-30 Environmental Tech America, Inc. Method and apparatus for pollution control of liquid wastes
DE10033513A1 (de) * 2000-07-11 2002-01-31 Textil Service Verfahren und Vorrichtung zur Behandlung von Wäschereiabwässern
ES2185514B1 (es) * 2001-10-13 2004-01-01 Hernandez Fernando M Hernandez Planta para la obtencion de agua exenta de sal a partir de aguas marinas, a baja temperatura, con funcionamiento continuo y recuperacion de entalpia.
US20050205408A1 (en) * 2004-03-22 2005-09-22 Marsh Douglas G Use of windpower to generate both electricity and potable water
TWI286126B (en) 2005-09-19 2007-09-01 Ind Tech Res Inst Process for treating a wastewater containing peracetic acid
DE102007036651A1 (de) * 2007-07-25 2009-01-29 A.C.K. Aqua Concept Gmbh Karlsruhe Prozessrecycling galvanischer Bäder

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Also Published As

Publication number Publication date
WO2013023911A1 (fr) 2013-02-21
US20140190902A1 (en) 2014-07-10
DE102011081007A1 (de) 2013-02-21

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