RU97110225A - METHOD FOR ISOLATION OF SUBSTANCES FROM THE GAS MEDIA BY DRY ADSORPTION - Google Patents

METHOD FOR ISOLATION OF SUBSTANCES FROM THE GAS MEDIA BY DRY ADSORPTION

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Publication number
RU97110225A
RU97110225A RU97110225/25A RU97110225A RU97110225A RU 97110225 A RU97110225 A RU 97110225A RU 97110225/25 A RU97110225/25 A RU 97110225/25A RU 97110225 A RU97110225 A RU 97110225A RU 97110225 A RU97110225 A RU 97110225A
Authority
RU
Russia
Prior art keywords
alumina
adsorption
gas
stage
separated
Prior art date
Application number
RU97110225/25A
Other languages
Russian (ru)
Other versions
RU2153923C2 (en
Inventor
Э.Бьярнэ Одд
Ведде Гейр
Original Assignee
АББ Флэкт Актиеболаг
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
Priority claimed from SE9404061A external-priority patent/SE503678C2/en
Application filed by АББ Флэкт Актиеболаг filed Critical АББ Флэкт Актиеболаг
Publication of RU97110225A publication Critical patent/RU97110225A/en
Application granted granted Critical
Publication of RU2153923C2 publication Critical patent/RU2153923C2/en

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Claims (5)

1. Способ отделения при очистке газа, выделенного из процесса получения алюминия, фтор-содержащих веществ от газа посредством адсорбции на твердом оксиде алюминия в виде частиц в процессе сухой адсорбции, отличающийся тем, что
газ очищают с оксидом алюминия в виде частиц в по меньшей мере двух стадиях (3, 4), причем оксид алюминия проходит стадии процесса адсорбции противотоком к газу;
газ очищают в первой стадии (3) сухой адсорбции с оксидом алюминия, который частично отработан;
оксид алюминия в виде частиц с адсорбированными фтор-содержащими веществами отделяют от газа ниже по течению потока от указанной первой стадии адсорбции перед тем, как газ перемещают ко второй стадии (4) адсорбции;
часть отделенного оксида алюминия в виде частиц с адсорбированными фтор-содержащими веществами, удаляют (33) от процесса адсорбции с целью возвращения фтор-содержащих веществ в процесс получения алюминия, а остаток отделенного оксида алюминия возвращают (32) в первую стадию адсорбции; и
газ, после отделения оксида алюминия, подают ко второй стадии сухой адсорбции и там очищают в сущности неотработанным химически активным оксидом алюминия в виде частиц, после чего оксид алюминия в виде частиц отделяют от газа ниже по течению потока от второй стадии сухой адсорбции перед тем, как газ выделяют в окружающую атмосферу, и по меньшей мере часть оксида алюминия, отделенную ниже по течению потока от второй стадии адсорбции, перемещают к первой стадии адсорбции.1. The method of separation during cleaning gas extracted from the process of obtaining aluminum, fluorine-containing substances from gas by adsorption on solid alumina in the form of particles in the process of dry adsorption, characterized in that
the gas is purified with alumina in the form of particles in at least two stages (3, 4), moreover, the aluminum oxide passes through the stages of the adsorption process countercurrent to the gas;
the gas is purified in the first stage (3) of dry adsorption with alumina, which is partially exhausted;
particulate alumina with adsorbed fluorine-containing substances is separated from the gas downstream of said first adsorption step before the gas is transferred to the second adsorption step (4);
part of the separated alumina in the form of particles with adsorbed fluorine-containing substances is removed (33) from the adsorption process in order to return fluorine-containing substances to the aluminum production process, and the remainder of the separated alumina is returned (32) to the first adsorption stage; and
the gas, after separation of the alumina, is fed to the second stage of dry adsorption and therein it is essentially purified by unprocessed chemically active alumina in the form of particles, after which the alumina in the form of particles is separated from the gas downstream from the second stage of dry adsorption before gas is released into the surrounding atmosphere, and at least a portion of the alumina separated downstream from the second adsorption step is transferred to the first adsorption step. 2. Способ по п. 1, отличающийся тем, что частично отработанный оксид алюминия возвращают в первую стадию (3) адсорбции, и количество возвращенного оксида алюминия управляется и таким образом контролируется, чтобы оптимизировать адсорбцию фтор-содержащих веществ и десорбцию диоксида серы в первой стадии (3) адсорбции. 2. The method according to p. 1, characterized in that the partially spent alumina is returned to the first adsorption stage (3), and the amount of returned alumina is controlled and thus controlled in order to optimize the adsorption of fluorine-containing substances and the desorption of sulfur dioxide in the first stage (3) adsorption. 3. Способ по п. 1 или 2 для очистки газообразной среды, содержащей по меньшей мере фтористый водород и диоксид серы, отличающийся тем, что оксид алюминия, который отделяют ниже по течению потока от второй стадии (4) адсорбции и загрязнен адсорбированным диоксидом серы, очищают на стадии десорбции (8), где оксид алюминия нагревают, и газ-носитель течет через него, для того, чтобы таким образом десорбировать значительное количество диоксида серы, адсорбированного на оксиде алюминия. 3. The method according to p. 1 or 2 for cleaning a gaseous medium containing at least hydrogen fluoride and sulfur dioxide, characterized in that the alumina, which is separated downstream from the second adsorption stage (4) and is contaminated with adsorbed sulfur dioxide, cleaned at the desorption stage (8), where the alumina is heated and the carrier gas flows through it, in order to thereby desorb a significant amount of sulfur dioxide adsorbed on alumina. 4. Способ по п. 3, отличающийся тем, что часть оксида алюминия, очищенного в стадии (8) десорбции, возвращают (83) ко второй стадии (4) адсорбции для того, чтобы увеличить адсорбционную способность на этой стадии. 4. The method according to p. 3, characterized in that a portion of the alumina purified in the desorption step (8) returns (83) to the second adsorption step (4) in order to increase the adsorption capacity in this step. 5. Способ по п. 3 или 4, отличающийся тем, что водяной пар, газообразный азот или другой неокисляющий газ течет через оксид алюминия в стадии (8) десорбции. 5. The method according to p. 3 or 4, characterized in that water vapor, gaseous nitrogen or other non-oxidizing gas flows through the alumina in the desorption step (8).
RU97110225/12A 1994-11-23 1995-11-22 Method of isolating substances from a gaseous medium involving dry adsorption technique RU2153923C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9404061A SE503678C2 (en) 1994-11-23 1994-11-23 Methods and apparatus for separating substances from a gaseous medium by dry adsorption
SE9404061-5 1994-11-23

Publications (2)

Publication Number Publication Date
RU97110225A true RU97110225A (en) 1999-05-27
RU2153923C2 RU2153923C2 (en) 2000-08-10

Family

ID=20396087

Family Applications (1)

Application Number Title Priority Date Filing Date
RU97110225/12A RU2153923C2 (en) 1994-11-23 1995-11-22 Method of isolating substances from a gaseous medium involving dry adsorption technique

Country Status (21)

Country Link
US (1) US5885539A (en)
EP (1) EP0793527B1 (en)
JP (1) JP3859706B2 (en)
CN (1) CN1070387C (en)
AR (1) AR000261A1 (en)
AU (1) AU687277B2 (en)
BR (2) BR9510702A (en)
CA (1) CA2203669C (en)
DE (1) DE69520593T2 (en)
ES (1) ES2157349T3 (en)
IS (1) IS1778B (en)
NO (1) NO302800B1 (en)
NZ (1) NZ296233A (en)
RO (1) RO115602B1 (en)
RU (1) RU2153923C2 (en)
SE (1) SE503678C2 (en)
SI (1) SI9520117A (en)
SK (1) SK282042B6 (en)
TJ (1) TJ338B (en)
UA (1) UA44749C2 (en)
WO (1) WO1996015846A1 (en)

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EP2489422B1 (en) 2011-02-18 2013-10-30 Alstom Technology Ltd A device and a method of cleaning an effluent gas from an aluminium production electrolytic cell
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FR2984366B1 (en) * 2011-12-19 2014-01-17 Solios Environnement METHOD AND DEVICE FOR IMPROVING SO2 CAPTATION IN GASES OF ELECTROLYSIS COVERS
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FR3029537B1 (en) * 2014-12-08 2016-12-09 Rio Tinto Alcan Int Ltd ELECTROLYSIS FACTORY AND METHOD FOR TREATING TANK GASES
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