SU172728A1 - METHOD FOR REGULATING THE COMPOSITION OF NITROGEN OXIDES - Google Patents

METHOD FOR REGULATING THE COMPOSITION OF NITROGEN OXIDES

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Publication number
SU172728A1
SU172728A1 SU863700A SU863700A SU172728A1 SU 172728 A1 SU172728 A1 SU 172728A1 SU 863700 A SU863700 A SU 863700A SU 863700 A SU863700 A SU 863700A SU 172728 A1 SU172728 A1 SU 172728A1
Authority
SU
USSR - Soviet Union
Prior art keywords
nitrogen oxides
composition
regulating
nitric acid
gas
Prior art date
Application number
SU863700A
Other languages
Russian (ru)
Original Assignee
К. В. Нейперт, А. П. Громов , В. М. Проценхо
Publication of SU172728A1 publication Critical patent/SU172728A1/en

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Description

При работе сернокислотных башенных систем расходуетс  большое количество азотной кислоты. Одна из главных причин повышенного расхода HNOs-колебание состава окислов азота в абсорбируемом газе.When operating sulfuric acid tower systems, a large amount of nitric acid is consumed. One of the main reasons for the increased consumption of HNOs is the fluctuation of the composition of nitrogen oxides in the gas to be absorbed.

Дл  регулировани  отношени  NO/NOa известно несколько способов. Один из них состоит в подаче азотной кислоты в смеси с нитрозой в первые по ходу газа насадочные продукционные башни. Однако ввиду снижеии  содержани  n.NOs после смешени  ее с большим количеством нитрозы, орошаюидей башию, а также вследствие длительного нахождени  этой смеси в насадке, ее свойство окисл ть NO не может быть иснользовано дл  своеврелгенного регулировани  колебаний состава окислов азота. Кроме того, в продукционной зоне, куда обычно подают HNOs, газ содержит большое количество окислов азота.Several methods are known to control the NO / NOa ratio. One of them consists in supplying nitric acid in a mixture with nitrosa to the nozzle production towers along the gas. However, due to a decrease in the content of n.NOs after mixing it with a large amount of nitrosis, irrigated bashia, and also due to the presence of this mixture in the packing for a long time, its ability to oxidize NO cannot be used to control the variations in the composition of nitrogen oxides in a timely manner. In addition, in the production zone where HNOs are usually supplied, the gas contains a large amount of nitrogen oxides.

В таких услови х сравнительно небольшое количество НМОз практически мало вли ет на конечную степень окислени  окислов перед абсорбционной зоной и тем более в конце этой зоны.Under such conditions, a relatively small amount of HMO3 has almost no effect on the final oxidation state of the oxides in front of the absorption zone and even more so at the end of this zone.

Предлагают вводить азотную кислоту или меланж не в смеси с нитрозой, а отдельно и подавать ее в расиыленном виде в систему перед последним абсорбером.They propose to introduce nitric acid or melange not in a mixture with nitrosa, but separately and feed it into the system before the last absorber.

Регулирование состава окислов азота осушествл ют автоматически или вручную, либо путем изменени  количества HNOg, подаваемой в систему по предлагаемому способу, либо изменением количества газа, проход щего через зону, орошаемую азотной кислотой, в зависимости от показаний на NOa фотоколориметра , установленного иосле последней или предпоследней по ходу газа башни.The composition of nitrogen oxides is controlled automatically or manually, either by changing the amount of HNOg supplied to the system according to the proposed method, or by changing the amount of gas passing through the zone irrigated with nitric acid, depending on the readings of the photocolorimeter NOa after the last or next to last along the gas tower.

Предмет изобретени Subject invention

Способ регулировани  состава окислов азота в абсорбциониой зоне башенных сернокислотных систем путем иодачи азотной кислоты или меланжа, отличающийс  тем, что, с целью уменьшени  потерь азотной кислоты, азотную кислоту или меланж подают в распыленном виде в систему неред последним абсорбером.The method of controlling the composition of nitrogen oxides in the absorption zone of tower sulfuric acid systems by iodine nitric acid or melange, characterized in that, in order to reduce the loss of nitric acid, nitric acid or melange is supplied in a spray form into the system not the last absorber.

SU863700A METHOD FOR REGULATING THE COMPOSITION OF NITROGEN OXIDES SU172728A1 (en)

Related Child Applications (1)

Application Number Title Priority Date Filing Date
SU803002459A Addition SU933779A2 (en) 1980-11-06 1980-11-06 Cast iron composition

Publications (1)

Publication Number Publication Date
SU172728A1 true SU172728A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000515A1 (en) * 1977-07-21 1979-02-07 Ciba-Geigy Ag Process for the separation of sulphur dioxide from a gas stream and installation for carrying out the process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000515A1 (en) * 1977-07-21 1979-02-07 Ciba-Geigy Ag Process for the separation of sulphur dioxide from a gas stream and installation for carrying out the process
US4242321A (en) * 1977-07-21 1980-12-30 Ciba-Geigy Corporation Process for separating SO2 from a current of gas containing the same, and plant for carrying out such process

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