公开(公告)号：WO2021254627A1

公开(公告)日：2021-12-23

申请号：PCT/EP2020/066982

申请日：2020-06-18

Applicant: OUTOTEC (FINLAND) OY

Inventor： DAUM, Karl-Heinz ,  MOHSLER, Stefan ,  BRÄUNER, Stefan

IPC: C01B17/765 ,  C01B17/80 ,  C01B17/806

Abstract: A process and its relating plant for producing sulfuric acid by catalytic oxidation of SO2 to SO3 and subsequent absorption of the SO3 in concentrated sulfuric acid in an intermediate and a final absorber stage. Therein, the intermediate absorber stage features a pre-absorber and a post-absorber. These two absorbers arranged such that the not-absorbed SO3 leaving the pre-absorber is supplied to a post-absorber and such that the sulfuric acid leaving the post-absorber is split into two streams of which the first stream is recirculated back in the pre-absorber and the second stream is at least partly passed into the post-absorber. The first stream is uncooled directly injected into the pre-absorber with a temperature between 80 and 200 °C, preferably between 100 and 150°C and the second stream passes a cooling and is at least partly fed into the post-absorber with a temperature between 60 and 90 °C.

公开(公告)号：WO2021089217A1

公开(公告)日：2021-05-14

申请号：PCT/EP2020/074103

申请日：2020-08-28

Applicant: OUTOTEC (FINLAND) OY

Inventor： DAUM, Karl-Heinz ,  BRÄUNER, Stefan ,  NEUMANN, Ralf

IPC: C01B17/50 ,  C01B17/79 ,  B01J23/22

Abstract: A process for producing sulphuric acid, in which a feed gas containing sulphur dioxide and oxygen at least partly reacts in a converter featuring at least one catalyst bed to form sulphur trioxide at a given temperature, and in which the produced sulphur trioxide containing gas introduced into an absorber wherein it is further converted to sulphuric acid, characterized in that - the feed gas to the first catalyst bed is generated by combustion of elemental sulphur with air or oxygen enriched air, and - said feed gas featuring a sulphur dioxide content between 14.0 and 20.0 vol-%, and - said feed gas featuring a molar ratio of oxygen to sulphur dioxide of 0.05

公开(公告)号：WO2021121612A1

公开(公告)日：2021-06-24

申请号：PCT/EP2019/086448

申请日：2019-12-19

Applicant: OUTOTEC (FINLAND) OY

Inventor： DAUM, Karl-Heinz ,  BRÄUNER, Stefan

IPC: C01B17/80 ,  B01D53/14 ,  C01B17/76 ,  C01B17/765 ,  C01B17/7655 ,  C01B17/806

Abstract: The invention relates to a venturi absorber tube for absorbing sulfur trioxide in sulfuric acid. Said venturi features a converging section (20), a throat section (30) and a diverging section (40) as well as a first conduit (21) at its top through which hot pro-cess gas containing sulfur trioxide is introduced. Further, the venturi shows a device for introducing sulfuric acid (22) by spraying sulfuric acid co-currently to the sulfur trioxide gas stream, a conduit (52) to withdraw liquid parts and a conduit (51) to withdraw gaseous parts. As the essential part of the invention, an internal device (60) located in or below the diverging section (40), which is a sieve tray, a multi-venturi array or a self-supporting dome featuring a convex shape.

公开(公告)号：WO2020025105A1

公开(公告)日：2020-02-06

申请号：PCT/EP2018/070636

申请日：2018-07-30

Applicant: OUTOTEC (FINLAND) OY

Inventor： DAUM, Karl-Heinz ,  STORCH, Hannes ,  BRÄUNER, Stefan

IPC: C01B17/54 ,  F23D11/00 ,  F23D14/00

Abstract: The invention describes a reactor for the combustion of sulfur. The reactor's walls (23) form a symmetrical base area b, whereby at least two burners (2, 2') are mounted each with a burner holding device (22). All burner holding devices (22) have the same distance to each other and each burner holding device (22) has the same distance to the a center point z of the base area b. At least one burner holding device (22') is arranged such that during operation the flame of said burner (2') shows an angle a between 0 and 45° to a center axis a, which is defined as the shortest connection between this burner holding device (22') and the center point z.

公开(公告)号：WO2017162857A1

公开(公告)日：2017-09-28

申请号：PCT/EP2017/057087

申请日：2017-03-24

Applicant: OUTOTEC (FINLAND) OY

Inventor： STORCH, Hannes ,  DAUM, Karl-Heinz ,  HAMMERSCHMIDT, Jörg ,  BRÄUNER, Stefan ,  CHARITOS, Alexandros ,  GÜNTNER, Jochen

IPC: C22B1/02

Abstract: The present invention relates to a process for thermal treatment of a sulfur-containing ore in which the ore is calcined at temperatures of between 600 and 1200 °C in the presence of oxygen in a reactor so that between 1 and 90 % by weight of sulfur contained in the ore is burned to sulfur dioxide and impurities contained are driven off in gaseous form. The exhaust gas being produced and containing the sulfur dioxide is fed into a gas purification comprising at least one component and/or the calcined ore is fed into at least one further process stage. An exhaust gas from the gas purification and/or the process stage and/or a gas used for cooling within the gas purification or for cooling within a further process stage is at least partially returned back into the reactor as recycling gas having a temperature of > 100 °C.

Abstract translation: 本发明涉及一种热处理含硫矿石的方法，其中矿石在反应器中在氧气存在下在600-1200℃的温度下煅烧，以使得 矿石中所含的1至90重量％的硫燃烧成二氧化硫并且所含的杂质以气态形式被驱除。 产生并含有二氧化硫的废气被送入包含至少一种组分的气体净化和/或煅烧的矿石被送入至少一个另外的处理阶段。 来自气体纯化和/或处理阶段的废气和/或用于在气体纯化或用于进一步处理阶段中的冷却的冷却的气体至少部分地返回到反应器中，作为温度为＆gt的再循环气体 ; 100℃。