An open pressurised agitated reactor and a method for mixing gas and slurry with each other
A reactor and slurry technology, applied in the direction of gas/steam and solid mixing, gas/steam and liquid mixing, mixing methods, etc.
Inactive Publication Date: 2013-09-04
OUTOTEC OYJ
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Problems solved by technology
[0004] The vertical reactors disclosed in the prior art, in other words the open autoclaves, work error-free under normal conditions, but as mentioned above, start-up after a stop often creates insurmountable difficulties, especially if the reactor's Height e.g. more than 30m
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Embodiment Construction
[0026] The plant according to the invention comprising a combination of vertical and horizontal reactors is particularly advantageous for chemical processes in which slurries with a high solids content or slurries in which the solids have a high specific gravity are passed through an oxygen-containing gas is oxidized, and it is desirable that it has a high oxidation efficiency. High solids content here means that the solids content of the slurry is about 40-70%. In such cases, it is often difficult to achieve effective contact between the gas and the slurry without sufficiently high pressure (eg, hydrostatic pressure) and sufficiently long residence time. The plant and method according to the invention also eliminates the difficulty of restarting the process after an interruption in operation, since the horizontal reactor is dimensioned such that its volume corresponds at least to that of the solids in the slurry being treated in the plant. volume. Furthermore, the horizonta...
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The invention relates to a plant (1) for carrying out hydrometallurgical processes under pressure. The plant consists of a tall vertical reactor (2) and a pressurized horizontal reactor (3) below the vertical reactor. The vertical reactor (2) comprises two nested tubes such that the upper part of the inner tube (4) is equipped with an element (17) such as a venturi that enhances the absorption of the supplied gas into the slurry and the downward Flow mixer (6). The slurry is fed into the inner tube (4) to flow downward, and the reaction gas is fed into the upper part of the inner tube (4) at least at one point. The vertical reactor (2) is connected in its lower part to an autoclaved horizontal reactor (3) equipped with active radial mixers (7) to keep the slurry suspension in motion and to achieve an upward flow to mix the slurry The solid suspension is transferred to the outer pipe (5) of the vertical reactor (2). In the method according to the invention, the length of the contact time between the gas and the slurry which takes place under pressure is extended by means of the horizontal reactor (3).
Description
technical field [0001] The invention relates to equipment for carrying out hydrometallurgical processes under pressure. The plant consists of a tall vertical reactor and a pressurized horizontal reactor below the vertical reactor. The components of the vertical reactor consist of two nested tubes such that the upper part of the inner tube is equipped with elements that enhance the absorption of gases into the slurry, such as venturi tubes, and downflow mixers. The slurry is fed into the inner tube to flow downward, and the reaction gas is fed into the upper part of the inner tube at least at one point. The vertical reactor is connected in its lower part to an autoclaved horizontal reactor equipped with effective radial mixers to keep the slurry suspension in motion and to achieve upward flow to transfer the slurry suspension to the vertical in the outer tube of the reactor. In the method according to the invention, the length of the contact time between gas and slurry which...
Claims
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IPC IPC(8): B01F3/04B01F3/06B01F3/14B01J19/18B01F23/30B01F23/57
CPCB01J19/006B01J19/0066B01J19/18B01J2219/00166B01J2219/00768B01J2219/00774B01J2219/182B01J2219/185B01F23/2323B01F25/312B01F25/31242B01F23/20B01F23/30B01F23/57
Inventor S-E·胡尔托姆L·利亚B·尼曼P·佩卡拉M·劳娜拉J·蒂霍宁J·瓦尔诺
Owner OUTOTEC OYJ