SU904750A1

SU904750A1 - Method of cleaning gases from nitrogen oxide

Info

Publication number: SU904750A1
Application number: SU802894992A
Authority: SU
Inventors: Ольга Владимировна Никитина; Валентина Ивановна Гусева; Вадим Георгиевич Самойлович; Оксана Глебовна Купенко
Original assignee: Государственный Научно-Исследовательский Энергетический Институт Им.Г.М.Кржижановского
Priority date: 1980-03-18
Filing date: 1980-03-18
Publication date: 1982-02-15

Description

(5) СПОСОБ ОЧИСТКИ ГАЗОВ ОТ ОКИСИ (5) METHOD FOR CLEANING OXIDE GASES

1one

Изобретение относитс к очистке газов от окиси азота и может найти применение в химической, нефтеперерабатывающей и др. промышленност х.The invention relates to the purification of gases from nitric oxide and can be used in the chemical, oil refining and other industries.

Известен способ очистки газов от окислов азота путем пропускани их сначала через слой силикагел , а затем через активированный уголь р.The known method of purification of gases from nitrogen oxides by passing them first through a layer of silica gel, and then through activated carbon r.

Способ характеризуетс двухстадийностью и недостаточно высокой степенью очистки (98,3%).The method is characterized by two stages and an insufficiently high degree of purification (98.3%).

Наиболее близким к предлагаемому по технической сущности вл етс способ очистки газов от окислов азота путем пропускани их через слой бурового угл при 600-800°С 12.The closest to the proposed technical essence is a method of purification of gases from nitrogen oxides by passing them through a layer of drilling coal at 600-800 ° C 12.

Этот способ имеет недостаточно высокую эффективность очистки из-за малой удельной поверхности адсорбента, необходимость его регенерации и частой замены сло .This method is not sufficiently high cleaning efficiency due to the small specific surface of the adsorbent, the need for its regeneration and frequent replacement of the layer.

Цель изобретени - повышение сте пени очистки и увеличение срока службы адсорбента. АЗОТАThe purpose of the invention is to increase the degree of cleaning and increase the service life of the adsorbent. NITROGEN

Поставленна цель достигаетс тем, что в способе, заключающемс в пропускании очищаемого газа через слой нагретого углеродистого материала , в качестве которого служит полукокс с величиной удельной поверхности 20-70 MVr с содержанием золы 20-501.. The goal is achieved by the fact that the method consists in passing the gas to be purified through a layer of heated carbonaceous material, which is used as a semi-coke with a specific surface area of 20-70 MVr with an ash content of 20-501.

Очистку провод т при 650-1000 С.Cleaning is carried out at 650-1000 C.

Способ заключаетс в следующем.The method is as follows.

10ten

Отход щие газы, загр зненные окисью азота, пропускают через слой полукокса с удельной поверхностью 20-70 MVr, содержащего 20-50 золы, при 650-1000°С. При этом окись Exhaust gases, contaminated with nitrogen oxide, are passed through a layer of semi-coke with a specific surface of 20–70 MVr, containing 20–50 ashes, at 650–1000 ° C. In this case, oxide

15 азота разлагаетс с образованием азота .Nitrogen decomposes to form nitrogen.

Пример 1. Газ, содержащий 2,2. N0, пропускают через слой полукокса иршабородинского Example 1. Gas containing 2.2. N0, passed through a layer of char Irshaborodinsky

Claims

20 coal with an ash content of 22% and a specific surface of 29 Mvr. The composition of the gas phase is recorded by mass spectrometry. At 500 ° C, 85% NO is located with the formation of nitrogen. Example 2. The conditions are the same as in Example 1. With 99.9 N0 decomposed. Example 3. The conditions are the same as in example 1. At 1000 ° C, 100% N0 decomposed to form nitrogen. The following presents data on the degree of purification from N0 at different contents of ash in the semi-coke at 65 ° C. Ash content Degree of cleaning in semi-coke from N0, I Data on the degree of cleaning of air from N0 at various values of the fraction of the surface of the semi-coke when the following; Continuation of the table When using semi-coke with a specific surface area of 2070 and an ash content of 20–50% at 650–1000 ° C, complete purification of the exhaust gases from nitric oxide occurs. The use of semi-coke instead of drill coal in the process of cleaning gases from N0 prolongs the service life of the carbonaceous material due to its less wear due to the lower content of volatile components in it. Claim 1. Gas purification method from nitrogen oxide by passing them through a layer of heated carbonaceous material, characterized in that, in order to increase the degree of purification and increase the service life of carbonaceous material, as a last G semi-coke G has a specific surface area of 20-70 ash 20-50%. 2. Method pop. 1, distinguished by the fact that cleaning is carried out at 650-1000 ° C. Sources of information taken into account in the examination 1. The author's certificate of the USSR N-380337. cl. B 01 D 53 / Oi, 1973.

2. USSR Author's Certificate No. 22379 4, cl. From 01 to 21/20, 1968.