SU700774A1 - Method of removing carbonate crust from surface of heat exchange apparatus - Google Patents

Method of removing carbonate crust from surface of heat exchange apparatus

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Publication number
SU700774A1
SU700774A1 SU782582940A SU2582940A SU700774A1 SU 700774 A1 SU700774 A1 SU 700774A1 SU 782582940 A SU782582940 A SU 782582940A SU 2582940 A SU2582940 A SU 2582940A SU 700774 A1 SU700774 A1 SU 700774A1
Authority
SU
USSR - Soviet Union
Prior art keywords
scale
sulfuric acid
solution
concentration
sulfate
Prior art date
Application number
SU782582940A
Other languages
Russian (ru)
Inventor
Владимир Алексеевич Козлов
Станислав Николаевич Филиппов
Тамара Ивановна Поляк
Зоя Григорьевна Каверзина
Геннадий Леонидович Перешеин
Original Assignee
Предприятие П/Я А-1297
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 Предприятие П/Я А-1297 filed Critical Предприятие П/Я А-1297
Priority to SU782582940A priority Critical patent/SU700774A1/en
Application granted granted Critical
Publication of SU700774A1 publication Critical patent/SU700774A1/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (1)

установлено, что скорость удалени  карбонатной накипи зависит от концентрации серной кислоты, а максимальное врем  растворени  зависит от концентрации сульфат-ионов . Ниже приведены данные, характеризующие максимальное врем  растворени  накипи , которое определ лось по началу образовани  вторичной сульфатной накипи, в зависимости от концентрации сульфат-ионов при растворении карбонатной накипи серной кислоты. На основании полученных данных выведено соотношение 1,3-igC где т - врем  растворени  накипи, мин; С - концентраци  сульфат-ионов в растворе серной кислоты, г/л; 1,3 и 0,0261- посто нные коэффициенты. Концентрацию серной кислоты в растворе необходимо брать в пределах 1-19 г/л. Раствор серной кислоты можно готовить на дистиллированной воде, а также на воде, содержащей сульфат-ионы. Например, использование дл  приготовлени  раствора серной кислоты в качестве растворител  воды Каспийского мор  с содержанием сульфат-ионов до 3,01 г/л, хот  несколько и увеличивает врем  растворени  сульфатной накипи , но при этом экономически более выгодно , поскольку исключен расход пресной воды. Использование предлагаемого способа удалени  карбонатной накипи с теплообменных аппаратов по сравнению с существующими способами обеспечивает следующие преимущества: возможность исключени  образовани  вторичной сульфатной накипи при удалении карбонатной накипи; уменьшение затрат на химические реагенты; снижение капитальных затрат, поскольку исключаетс  необходимость в изготовлении емкостей дл  приготовлени  промывного раствора и осаждени  сульфата кальци ; возможность использовани  в качестве промывного раствора соленых вод (в том числе морских); снижение коррозионного износа оборудовани  за счет уменьшени  коррозионной активности промывного раствора; возможность использовани  способа в районах, удаленных от транспортных коммуникаций . Формула изобретени  Способ удалени  карбонатной накипи с теплообменных поверхностей аппаратов путем промывки их раствором серной кислоты , отличающийс  тем, что, с целью исключени  образовани  вторичных сульфатных отложений, при удалении карбонатной накипи, концентрацию серной кислоты в растворе берут в пределах 1 -19 г/л, а врем  промывки определ ют по формуле 0,0261 где т - врем  растворени  накипи, мин; С - концентраци  сульфат-ионов в растворе серной кислоты, г/л; 1,3 и 0,0261 - посто нные коэффициенты. Источники информации, прин тые во внимание при экспертизе 1. Маргулова Т. X. Хи.мические очистки теплоэнергетического оборудовани . М., «Энерги , 1969.It was found that the rate of carbonate scale removal depends on the concentration of sulfuric acid, and the maximum dissolution time depends on the concentration of sulfate ions. Below are data describing the maximum time for dissolution of scale, which was determined by the beginning of the formation of secondary sulfate scale, depending on the concentration of sulfate ions when the carbonate scale of sulfuric acid is dissolved. Based on the data obtained, the ratio of 1,3-igC is derived where t is the time of dissolution of scale, min; C is the concentration of sulfate ions in a solution of sulfuric acid, g / l; 1.3 and 0.0261 are constant coefficients. The concentration of sulfuric acid in the solution must be taken in the range of 1-19 g / l. A solution of sulfuric acid can be prepared in distilled water, as well as water containing sulphate ions. For example, the use of a solution of sulfuric acid as a solvent for water of the Caspian Sea with a sulfate ion content of up to 3.01 g / l, although it slightly increases the dissolution time of sulphate scale, but it is economically more profitable because the consumption of fresh water is excluded. Using the proposed method of removing carbonate scale from heat exchangers compared with existing methods provides the following advantages: the possibility of eliminating the formation of secondary sulfate scale when removing carbonate scale; reducing the cost of chemicals; a reduction in capital cost, since it eliminates the need for making containers for preparing the washing solution and precipitating calcium sulfate; the possibility of using saline water (including sea water) as a washing solution; reduction of equipment corrosion by reducing the corrosivity of the washing solution; the possibility of using the method in areas remote from transport communications. Claims method of removing carbonate scale from heat transfer surfaces of apparatuses by washing them with a solution of sulfuric acid, characterized in that, in order to eliminate the formation of secondary sulfate deposits, while removing carbonate scale, the concentration of sulfuric acid in the solution is taken in the range of 1 -19 g / l, and washing time is determined by the formula 0.0261 where t is the time of dissolution of scale, min; C is the concentration of sulfate ions in a solution of sulfuric acid, g / l; 1.3 and 0.0261 are constant coefficients. Sources of information taken into account in the examination 1. Margulova T. X. Chemical cleaning of heat and power equipment. M., “Energie, 1969.
SU782582940A 1978-02-20 1978-02-20 Method of removing carbonate crust from surface of heat exchange apparatus SU700774A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU782582940A SU700774A1 (en) 1978-02-20 1978-02-20 Method of removing carbonate crust from surface of heat exchange apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU782582940A SU700774A1 (en) 1978-02-20 1978-02-20 Method of removing carbonate crust from surface of heat exchange apparatus

Publications (1)

Publication Number Publication Date
SU700774A1 true SU700774A1 (en) 1979-11-30

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SU782582940A SU700774A1 (en) 1978-02-20 1978-02-20 Method of removing carbonate crust from surface of heat exchange apparatus

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SU (1) SU700774A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4692252A (en) * 1986-03-24 1987-09-08 Vertech Treatment Systems, Inc. Method of removing scale from wet oxidation treatment apparatus
US4872919A (en) * 1988-01-28 1989-10-10 The Procter & Gamble Company Method for removing precipitated calcium citrate from juice pasteurization or sterilization equipment
CN100436647C (en) * 2005-04-05 2008-11-26 贵阳铝镁设计研究院 Scale eliminating method for casing pre-heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4692252A (en) * 1986-03-24 1987-09-08 Vertech Treatment Systems, Inc. Method of removing scale from wet oxidation treatment apparatus
US4872919A (en) * 1988-01-28 1989-10-10 The Procter & Gamble Company Method for removing precipitated calcium citrate from juice pasteurization or sterilization equipment
CN100436647C (en) * 2005-04-05 2008-11-26 贵阳铝镁设计研究院 Scale eliminating method for casing pre-heater

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