Способ переработки газовых смесей с высоким содержанием диоксида серы
Патенты
| Язык: |
Русский |
| Тип: |
Патент на изобретение |
| Номер (11) |
EA 006757 B1 |
| Номер заявки (21): |
200401598 |
| Дата подачи заявки (22): |
2 дек. 2004 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
28 апр. 2006 г. |
| Дата публикации заявки (43): |
28 апр. 2006 г. |
| Авторы |
Загоруйко А.Н.
|
| Организации |
| 1 |
Институт катализа им. Г.К. Борескова СО РАН
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Изобретение относится к области химии, а именно к способам переработки газовых смесей с высо-
ким содержанием диоксида серы (более 12 об.%), и может применяться для окисления диоксида серы в
триоксид в производстве серной кислоты как из элементарной серы, так и при очистке серосодержащих
промышленных газовых выбросов, в частности металлургических газов
The invention relates to chemistry, in particular, to methods for processing of gas mixtures with high content of sulfur dioxide (more than volume 12% ) and can be used for oxidation of sulfur dioxide to sulfur trioxide in producing sulphuric acid both from elemental sulfur and in purification sulfur-containing industrial gas wastes, in particular, metallurgical gases.The inventive method of gas mixtures processing comprises mixing initial mixture containing SOwith diluent air, further passing the obtained mixture through two contacting stages, each containing one or several catalyst layers, cooling the mixture therebetween, absorbing recovery of the produced sulfur trioxide, recirculation the mixture after the first contacting stage into the initial mixture flow, the mixture portion to be recirculated is taken from total mixture flow prior to absorption recovery of sulfur dioxide at the first contacting stage. Wherein the volume of recirculation mixture is maintained at the level providing maximum temperature in the first catalyst layer not exceeding the threshold of the catalyst thermostability (which is about 620ºC for industrial vanadium-oxide catalysts).The proposed method is characterized by minimum mixture discharge at all technological steps of the second contacting stage and minimum mixture volume discharged into atmosphere thus providing minimum specific discharges of non-reacted SOand the most effective ecological efficiency of the inventive method, the lesser volume mixture at all process stages provides for substantial decrease of catalyst loads, as well as dimensions and cost of the equipment.