SU710597A1 - Method of purifying waste gases of nitrogen acid decomposition of phosphate raw material - Google Patents
Method of purifying waste gases of nitrogen acid decomposition of phosphate raw material Download PDFInfo
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- SU710597A1 SU710597A1 SU772456173A SU2456173A SU710597A1 SU 710597 A1 SU710597 A1 SU 710597A1 SU 772456173 A SU772456173 A SU 772456173A SU 2456173 A SU2456173 A SU 2456173A SU 710597 A1 SU710597 A1 SU 710597A1
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- USSR - Soviet Union
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- waste gases
- acid decomposition
- phosphate raw
- ammonia
- purification
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Description
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Изобретение относитс к области очистки газовых выбросов азотнокислотного разложени фосфатного сырь и может быть использовано при производстве нитрофоски.The invention relates to the field of purification of gas emissions of nitric acid decomposition of phosphate raw materials and can be used in the production of nitrophos.
Известны способы очистки газов от окислов азота с помощью аммиака и карбамида 1 и 2.Known methods of gas cleaning from nitrogen oxides using ammonia and carbamide 1 and 2.
Известные способы не пригодны дл очистки газов азотнокислотного разложени фосфатного сырь ,которые содержат смесь окислов азота, газообразных соединений фтора и аммиака.The known methods are not suitable for the purification of gases of nitric acid decomposition of phosphate raw materials, which contain a mixture of nitrogen oxides, gaseous fluorine compounds and ammonia.
Наиболее близким по технической сущности и достигаемому результату к предлагаемому вл етс способ очистки отход щих газов азотнокислотного разложени фосфатов, заключающийс в абсорбции кислых примесей содовым раствором 3.The closest in technical essence and the achieved result to the proposed is the method of purification of the exhaust gases of nitric acid decomposition of phosphates, which consists in the absorption of acidic impurities by soda solution 3.
Однако известный способ не достаточно эффективен и не позвол ет непрерывно вести процесс очистки из-за образовани труднорастворимых солей, которые забивают теплообменные устройства и трубопроводы.However, the known method is not efficient enough and does not allow continuous cleaning process due to the formation of sparingly soluble salts that clog heat exchangers and pipelines.
Цель изобретени - более полное поглощение окислов азота, фтористыхThe purpose of the invention is a more complete absorption of nitrogen oxides, fluorides.
соединений и аммиака при одновременном упрощении процесса.compounds and ammonia while simplifying the process.
Поставленна цель достигаетс тем, что во врем очистки отход щих газов азотнокислотного разложени фосфатного сырь при получении сложных удобрений путем сорбции отход щих Газов щелочными растворами в качест0 ве щелочных растворов используют смесь раствора углеаммониевых солей и карбамида, концентрацию углеаммо иевых солей берут 0,5-10 вес.% в пересчете на аммиак, а карбамид по This goal is achieved by the fact that during the purification of the exhaust gases of nitric acid decomposition of phosphate raw materials, when obtaining complex fertilizers by sorption of the exhaust Gases with alkaline solutions, a mixture of carbon ammonium salts and urea is used as the alkaline solutions; wt.% in terms of ammonia, and urea by
5 весовому соотношению с поступающими на очистку окислами азота (0,51 ,0):1, при весовом .соотношении компонентов ЫНз: СО (N11)2 : СО2 (1-2):(0,25-1) :(1,3-5,2) .5 weight ratio with incoming nitrogen oxides (0.51, 0): 1 for purification, with a weight ratio of components ННз: СО (N11) 2: СО2 (1-2) :( 0.25-1): (1, 3-5,2).
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Пример. Газ, содержащий 5 г/нм окислов азота, 1,5 г/нм соединений фтора и 1 г/нм аммиакаExample. Gas containing 5 g / nm of nitrogen oxides, 1.5 g / nm of fluorine compounds and 1 g / nm of ammonia
из реакторов производства нитрофоски в количестве 24000 нм /час, поступает в абсорбер. Свежий, откорреги рованный раствор поступает из цеха карбамида и смешиваетс с циркул ционным раствором, который охлаждаетс до и .поступает на орошение абсорбера. Свежий раствор имеет следующий состав;. карбамид 1%, аммиак 2%, С02 3,9%. Количество свежего раствора 2,5 . Отработанныйfrom the nitrophosphate production reactors in the amount of 24,000 nm / hour, enters the absorber. The fresh, rationed solution comes from the carbamide shop and is mixed with the circulating solution, which is cooled before and goes to the absorber irrigation. A fresh solution has the following composition; carbamide 1%, ammonia 2%, C02 3.9%. The amount of fresh solution is 2.5. Spent
раствор отводитс в реакторное отделение дл разбавлени пульпы.the solution is withdrawn to the reactor compartment to dilute the pulp.
Полученные данные по очистке отход щих газов известным и предлагаемым способами представлены в таблице.The obtained data on the purification of flue gases by known and proposed methods are presented in the table.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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SU772456173A SU710597A1 (en) | 1977-02-21 | 1977-02-21 | Method of purifying waste gases of nitrogen acid decomposition of phosphate raw material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SU772456173A SU710597A1 (en) | 1977-02-21 | 1977-02-21 | Method of purifying waste gases of nitrogen acid decomposition of phosphate raw material |
Publications (1)
Publication Number | Publication Date |
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SU710597A1 true SU710597A1 (en) | 1980-01-25 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU772456173A SU710597A1 (en) | 1977-02-21 | 1977-02-21 | Method of purifying waste gases of nitrogen acid decomposition of phosphate raw material |
Country Status (1)
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SU (1) | SU710597A1 (en) |
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1977
- 1977-02-21 SU SU772456173A patent/SU710597A1/en active
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