PL115256B2 - System for continuous preheating of gases before conversion of sulfur dioxide to sulfur trioxide - Google Patents

System for continuous preheating of gases before conversion of sulfur dioxide to sulfur trioxide Download PDF

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Publication number
PL115256B2
PL115256B2 PL21462379A PL21462379A PL115256B2 PL 115256 B2 PL115256 B2 PL 115256B2 PL 21462379 A PL21462379 A PL 21462379A PL 21462379 A PL21462379 A PL 21462379A PL 115256 B2 PL115256 B2 PL 115256B2
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Poland
Prior art keywords
gases
gases before
sulfur
node
heat exchanger
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PL21462379A
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Polish (pl)
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PL214623A2 (en
Inventor
Janusz Mrowiec
Norbert Lison
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Biuro P Przemyslu Metal
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Priority to PL21462379A priority Critical patent/PL115256B2/en
Publication of PL214623A2 publication Critical patent/PL214623A2/xx
Publication of PL115256B2 publication Critical patent/PL115256B2/en

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Description

Opis patentowy opublikowano: 30.10.1982 Int. Cl.2 C01B 17/76 CZYTELNIA Urzedu Patentowego Twórcy wyulazk«: Janusz Mrowiec, Norbert Lison Uprawniony z patentu tymczasowego: Biuro Projektów Przemyslu Metali Niezelaznych „Bipromet", Katowice (Polska) Uklad urzadzen do dqgfeg° podgrzewania gazów przed konwersja SO2 do SO3 Przedmiotem wyalazku jest uklad urzadzen do ciaglego podgrzewania gazów przed konwersja SO?do SO3 w fabryce kwasu siarkowego.W procesach ogniowej obróbki rud siarczkowych wywiazuja sie gazy o temperaturze 1000 do 1300 K za¬ wierajace SO2, które przed skierowaniem ich do ukladów odpylajacych i osuszajacych sa ze wzgledów technologicznych ochladzane do temperatury okolo 670 K. Oczyszczone i osuszone gazy kierowane sa nastepnie do wezla konwersji, gdzie w obecnosci pieciotlenku wanadu nastepuje przemiana SO2 do SO3, a po absorpcji z woda otrzymywany jest kwas siarkowy. Reakcja utleniania SOido SO3 zachodzi w temperaturze powyzej 670 K i jest reakcja egzotermiczna, a wywiazujace sie cieplo którego ilosc jest proporcjonalna do stezenia SO2, wykorzystywane jest do podgrzania gazu do temperatury reakcji. Przy odpowiednim stezeniu SO2 w gazach, ilosc wydzielanego ciepla jest wystarczajaco duza i wezel konwersji pracuje wtedy bez potrzeby wprowadzenia dodatkowego ciepla do ukladu. W przypadku gdy gazy pochodzace z procesów metalurgi- , cznych maja niskie stezenie SO2, to dla wyrównania bilansu cieplnego sa one podgrzewane w dodatkowo zainstalowanych urzadzeniach ogrzewczych, opalanych gazem, olejem lub innymi surowcami energety¬ cznymi. Uklad taki ma te wade, ze dla uzupelnienia bilansu cieplnego wystepujacego przy gazach o niskim stezeniu SO2 sa instalowane dodatkowe urzadzenia ogrzewcze w których spalane sa wartosciowe surowce energetyczne, co obarczone jest dodatkowymi nakladami.Istota wynalazku jest to, ze uklad ma rurowy przewód wprowadzony do przeponowego wymiennika ciepla, do którego jest podlaczony zamkniety obieg chlodzenia, mycia i suszenia gazów, skhdajacy sie z rurociagu podlaczonego do wezla mycia gazów, z którego jest wyprowadzony króciec do wezla suszenia, a w dalszej kolejnosci przewód podlaczony do przeponowego wymiennika ciepla zamyka caly obieg.Zaleta ukladu urzadzen do ciaglego podgrzewania gazów przed konwersja SChdo SO3 jest oszczednosc surowców energetycznych, uzyskana przez wtórne wykorzystanie ciepla gazów metalurgicznych, a aparatura stosowana do przeponowej wymiany ciepla ma prosta konstrukcje i dziala niezawodnie w sposób ciagly.Uklad urzadzen do ciaglego podgrzewania gazów przed konwersja SO2 do SO3 jest przedstawiony na zalaczonym schemacie technologicznym.Uklad urzadzen ma rurowy przewód 1 wprowadzony do przeponowego wymiennika 2 ciepla, do którego jest podlaczony zamkniety obieg chlodzenia, mycia i suszenia gazów, skladajacy sie z rurociagu 3 podlaczonego do wezla 4 mycia gazów, z którego jest wyprowadzony króciec 5 do wezla 6suszenia. W dalszej kolejnosci przewód 7 podlaczony do przeponowego wymiennika 2 ciepla zamyka caly obieg, a odrebny rurociag 8 laczy przeponowy wymiennik 2 ciepla z wezlem 9 konwersji S02 do SO3. Dzialanie ukladu2 115254 urzadzen do ciaglego podgrzewania gazów przed konwersja SO2 do SOj jest nastepujace: Gazy z procesu metalurgicznego o temperaturze 1000-1300 K wprowadzane sa rurowym przewodem 1 do przeponowego wymiennika 2 ciepla * gdzie zostaja ochlodzone do temperatury okolo 670 K i rurociagiem 3sa doprowadzane do wezla 4 mycia gazów, a w dalszej kolejnosci króccem 5do wezla osuszenia. Oczyszczone i osuszone gazy o temperaturze okolo 300 K sa nastepnie zawracane przewodem 7 do przeponowego wymiennika 2 ciepla, gdzie sa podgrzewane cieplem gazów metalurgicznych do temperatury potrzebnej dla prawidlowej pracy wezla konwersji. PLThe patent description was published: 30.10.1982 Int. Cl.2 C01B 17/76 READING ROOM of Urzedu Patentowego Creator Wyulazk «: Janusz Mrowiec, Norbert Lison Authorized by the provisional patent: Biuro Projektów Przemyslu Metali Niezelaznych" Bipromet ", Katowice (Poland) System of devices for dqgfeg ° heating of gases before the conversion of SO2 to SO3. The subject of the invention is a system of devices for the continuous heating of gases before the conversion of SO? To SO3 in a sulfuric acid plant. They are directed to dedusting and drying systems, due to technological reasons, they are cooled to a temperature of about 670 K. The cleaned and dried gases are then directed to the conversion node, where in the presence of vanadium pentoxide, SO2 is converted to SO3, and sulfuric acid is obtained after absorption from water. The oxidation of SOido SO3 takes place at a temperature above 670 K and is exothermic and results in The amount of heat proportional to the SO2 concentration is used to heat the gas to the reaction temperature. With the appropriate concentration of SO2 in the gases, the amount of heat released is large enough and the conversion node then works without the need to introduce additional heat to the system. When gases from metallurgical processes have a low concentration of SO2, they are heated in additionally installed heating devices fired with gas, oil or other energy resources to compensate for the heat balance. Such a system also has the disadvantage that to supplement the heat balance occurring with gases with a low SO2 concentration, additional heating devices are installed in which valuable energy resources are burnt, which is burdened with additional expenditure. The essence of the invention is that the system has a tubular conduit inserted into the membrane a heat exchanger to which a closed circuit for cooling, washing and drying gases is connected, consisting of a pipe connected to the gas washing node, from which a connection for a drying node is led, and then the pipe connected to the membrane heat exchanger completes the entire circuit. of continuous gas preheating equipment prior to SCh to SO3 conversion is a saving of energy resources, obtained by reusing the heat of metallurgical gases, and the apparatus used for diaphragm heat exchange is simple in design and works reliably on a continuous basis. SO2 to SO3 is presented in the attached technological diagram. The device system has a tubular conduit 1 introduced into the membrane heat exchanger 2, to which a closed circuit for cooling, washing and drying gases is connected, consisting of a pipeline 3 connected to a gas washing node 4, from which connector 5 is led out to the drying node 6. Subsequently, the pipe 7 connected to the membrane heat exchanger 2 closes the entire circuit, and a separate pipe 8 connects the membrane heat exchanger 2 with the S02 to SO3 conversion node 9. The operation of the system for continuous heating of gases before the conversion of SO2 to SOj is as follows: Gases from the metallurgical process with a temperature of 1000-1300 K are introduced through a pipe 1 to the membrane heat exchanger 2 * where they are cooled to a temperature of about 670 K and supplied to a 3sa pipeline to gas washing point 4, and then with port 5 to the drying point. The cleaned and dried gases with a temperature of about 300 K are then returned via line 7 to the membrane heat exchanger 2, where they are heated by the heat of the metallurgical gases to the temperature needed for the correct operation of the conversion node. PL

Claims (1)

1. Zastrzezenie patentowe Uklad urzadzen do ciaglego podgrzewania gazów przed konwersja SO2 do SO3, znamienny tym, ze ma rurowy przewód (1) wprowadzony do przeponowego wymiennika (2) ciepla, do którego jest podlaczony zamkniety obieg chlodzenia, mycia i suszenia gazów, skladajacy sie z rurociagu (3), podlaczonego do wezla (4) mycia gazów, z którego jest wyprowadzony króciec (5) do wezla (6) suszenia, a w dalszej kolejnosci przewód (7) podlaczony do przeponowego wymiennika ciepla (2) zamyka caly obieg. Prac. Poligraf. UP PRL. Naklad 120 egz. Cena 100 zl PL1. Patent claim A system of devices for the continuous heating of gases before the conversion of SO2 to SO3, characterized in that it has a tubular conduit (1) introduced into the membrane heat exchanger (2), to which is connected a closed circuit for cooling, washing and drying gases, consisting of from the pipeline (3), connected to the gas washing node (4), from which the connecting piece (5) to the drying node (6) is led, and then the pipe (7) connected to the membrane heat exchanger (2) completes the entire circuit. Wash. Typographer. UP PRL. Mintage 120 copies Price PLN 100 PL
PL21462379A 1979-03-31 1979-03-31 System for continuous preheating of gases before conversion of sulfur dioxide to sulfur trioxide PL115256B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL21462379A PL115256B2 (en) 1979-03-31 1979-03-31 System for continuous preheating of gases before conversion of sulfur dioxide to sulfur trioxide

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Application Number Priority Date Filing Date Title
PL21462379A PL115256B2 (en) 1979-03-31 1979-03-31 System for continuous preheating of gases before conversion of sulfur dioxide to sulfur trioxide

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PL115256B2 true PL115256B2 (en) 1981-03-31

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