EA200602265A1 - METHOD OF PREVENTING THE FORMATION OF CALCIUM SULFATE DEPOSITS - Google Patents

METHOD OF PREVENTING THE FORMATION OF CALCIUM SULFATE DEPOSITS

Info

Publication number
EA200602265A1
EA200602265A1 EA200602265A EA200602265A EA200602265A1 EA 200602265 A1 EA200602265 A1 EA 200602265A1 EA 200602265 A EA200602265 A EA 200602265A EA 200602265 A EA200602265 A EA 200602265A EA 200602265 A1 EA200602265 A1 EA 200602265A1
Authority
EA
Eurasian Patent Office
Prior art keywords
water
evaporation
calcium sulfate
wastewater
alkaline agent
Prior art date
Application number
EA200602265A
Other languages
Russian (ru)
Other versions
EA010187B1 (en
Inventor
Олег Георгиевич Салашенко
Original Assignee
Закрытое Акционерное Общество "Икс А"
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 Закрытое Акционерное Общество "Икс А" filed Critical Закрытое Акционерное Общество "Икс А"
Priority to EA200602265A priority Critical patent/EA200602265A1/en
Priority to UAA200713623A priority patent/UA89234C2/en
Publication of EA010187B1 publication Critical patent/EA010187B1/en
Publication of EA200602265A1 publication Critical patent/EA200602265A1/en

Links

Classifications

    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

Abstract

Изобретение относится к области водоподготовки и переработки стоков и может быть использовано для предотвращения отложений при термическом обессоливании воды, опреснении воды или упаривании стоков. Способ предотвращения образования отложений сульфата кальция включает подачу в испарительную установку исходной воды, предварительно обработанной ингибитором отложений минеральных солей, в качестве которого используют аминполифосфоновые комплексоны, и смешение исходной воды с циркуляционной водой, причем из испарительной установки непрерывно отводят часть циркуляционной воды в количестве 3-60% от расхода исходной воды, которую затем дополнительно обрабатывают щелочным агентом (едкий натр, сода, известь, щелочные стоки) с последующим удалением образующегося кристаллического сульфата кальция и возвратом осветленной воды в испарительную установку, причем молярная концентрация щелочного агента составляет 0,02-0,3 от молярной концентрации сульфата кальция в исходной воде. Кроме того, совместно с обработкой щелочным агентом отведенную часть циркуляционной воды обрабатывают ортофосфатом, например тринатрийфосфатом, концентрация которого составляет 0,1-5 от концентрации ингибитора. Технический результат - повышение степени глубокого упаривания природных и сточных вод до кратности упаривания 50 и более раз при заданной продувке и сохранении высокой производительности испарительной установки и качества дистиллята.The invention relates to the field of water treatment and wastewater treatment and can be used to prevent deposits during thermal desalination of water, desalination or evaporation of wastewater. The method of preventing the formation of calcium sulfate deposits includes the supply of source water pretreated with an inhibitor of mineral salts to an evaporation unit, using amine polyphosphonic chelating agents, and mixing the source water with circulating water, and part of the circulating water in the amount of 3-60 % of the initial water consumption, which is then further treated with an alkaline agent (caustic soda, soda, lime, alkaline drains), followed by removing the resulting crystalline calcium sulfate and returning the clarified water to the evaporation unit, the molar concentration of the alkaline agent being 0.02-0.3 of the molar concentration of calcium sulfate in the initial water. In addition, together with the treatment with an alkaline agent, the withdrawn part of the circulating water is treated with orthophosphate, for example, trisodium phosphate, the concentration of which is 0.1-5 of the inhibitor concentration. The technical result is an increase in the degree of deep evaporation of natural and wastewater to the multiplicity of evaporation 50 or more times with a given purge and maintaining high performance of the evaporator and the quality of distillate.

EA200602265A 2006-12-08 2006-12-08 METHOD OF PREVENTING THE FORMATION OF CALCIUM SULFATE DEPOSITS EA200602265A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EA200602265A EA200602265A1 (en) 2006-12-08 2006-12-08 METHOD OF PREVENTING THE FORMATION OF CALCIUM SULFATE DEPOSITS
UAA200713623A UA89234C2 (en) 2006-12-08 2007-12-06 Process for prevention of calcium sulphate depositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EA200602265A EA200602265A1 (en) 2006-12-08 2006-12-08 METHOD OF PREVENTING THE FORMATION OF CALCIUM SULFATE DEPOSITS

Publications (2)

Publication Number Publication Date
EA010187B1 EA010187B1 (en) 2008-06-30
EA200602265A1 true EA200602265A1 (en) 2008-06-30

Family

ID=40863231

Family Applications (1)

Application Number Title Priority Date Filing Date
EA200602265A EA200602265A1 (en) 2006-12-08 2006-12-08 METHOD OF PREVENTING THE FORMATION OF CALCIUM SULFATE DEPOSITS

Country Status (2)

Country Link
EA (1) EA200602265A1 (en)
UA (1) UA89234C2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU87653A1 (en) * 1949-03-19 1949-11-30 С.И. Голуб The method of reducing the deposition of crystals on the heating tubes of the evaporators and device for implementing the method
SU833550A1 (en) * 1979-02-22 1981-05-30 Донецкий Филиал Всесоюзного Научно- Исследовательского И Проектного Инсти-Тута По Очистке Технологических Газов,Сточных Вод И Использованию Вторичныхэнергоресурсов Предприятий Черной Метал-Лургии Method of thermal desalinization of boiler scale water
SU891584A1 (en) * 1980-05-16 1981-12-23 Ставропольский политехнический институт Method of thermal softening of water with increased calcium sulphate content
DE4431546A1 (en) * 1994-09-05 1996-03-07 Jakob Dr Ing Hois Process and device for desalination of sea water

Also Published As

Publication number Publication date
EA010187B1 (en) 2008-06-30
UA89234C2 (en) 2010-01-11

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Legal Events

Date Code Title Description
MM4A Lapse of a eurasian patent due to non-payment of renewal fees within the time limit in the following designated state(s)

Designated state(s): AZ BY KZ TM RU

NF4A Restoration of lapsed right to a eurasian patent

Designated state(s): AZ BY KZ TM RU

MM4A Lapse of a eurasian patent due to non-payment of renewal fees within the time limit in the following designated state(s)

Designated state(s): AZ BY KZ TM RU