SU1346215A1 - Method of cleaning flue gases from organic substances - Google Patents

Abstract

The invention relates to methods for the catalytic purification of air from impurities of organic substances used in the chemical, light and mineralized industry and allowing to increase the service life of the catalyst while increasing the degree of purification. The purified air is passed through a barrier discharge zone with a frequency of 2.1–2.6 kHz and a voltage of 6–12 kV, which leads to the formation of ozone, and then gas is passed through a manganese oxide catalyst containing 10–. 60 wt.% Of the active U-MnO-, with a bulk velocity of 5000–20000 h and a temperature of 20–100 s. The degree of purification from organic matter is 99.6 - 100% with a catalyst life of 350 hours. Ozone in the purified gases is absent. 1 tab. i (O with 4 O) GS

Description

The invention relates to methods for purifying air from impurities of organic substances and can be used in chemical, light and dry milk farms.

The purpose of the invention is to increase the lifetime of the catalyst with an increase in the degree of purification.

Example 1. Purified gas

stream containing 0.1 g / m acetone

subjected to processing in the zone of the barrier discharge at a frequency of 2.1 kHz to a voltage of 6 kV. This results in deep oxidation of 31.1% of acetone and at the same time 0.27 g / m of ozone is formed in the gas stream. Next, the gas stream is directed to the zone of deep catalytic oxidation, where on the catalyst containing 10 wt.% Active Y-MpOd, at 1 c. the catalyst bed of 20 ° C and a space velocity of 5000 hours achieves almost 99.6% of the degree of total deep (up to CO 2 and HgO) oxidation of acetone for 350 hours. At the same time, complete cleaning of ozone is carried out.

The results of experiments using frequencies of barrier discharge equal to

Acegon

0.1

C, 15

0.2

0.2

0.2

0.2

0.1

e

0.1 0.1

2.1

2.4

2.4 2, nd 2.6 2.6

152

2.4 - 2.6 kHz, as well as with the supply of ozone to the gases being purified without a barrier discharge, are given in the table. The use of a bit with a frequency below 2.1 kHz and above 2.6 kHz does not have a significant effect on increasing the purity level.

The method allows purification of oxygen-containing gases from all classes of organic substances. The lifetime of the catalyst is up to 350 hours versus 300 hours in a known method with a purity of 99.6 - 100% versus 98%.

.Formula

of

rete n i

The method of purification of waste gases from organic substances by ozone oxidation on a manganese-acid catalyst, characterized in that, in order to prolong the life of the catalyst while increasing the degree of purification, the exhaust gases are preliminarily passed through a barrier discharge zone with a frequency of 2.1 - 2, 6 kHz.

Editor S. Patrushev

Compiled by G. Vinokurova

Tehred A. Kravchuk Proofreader A. Zimokosov

Order 5073/8

Circulation 656 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., D. 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

.Claim 2Q Method of purification of exhaust gases from organic substances by ozone oxidation on a manganese-acid catalyst, characterized in that, in order to increase the catalyst service life while increasing the degree of purification, the exhaust gases are preliminarily passed through the barrier discharge zone with a frequency of 2.1 - 2.6 kHz. ¹ Experience Organic component The content of the organic component in the gas mixture, g / m ³ .1. Zone t, kHz career rank Deep catalytic zone Directly Power Soder- oxide singing -___— - zhenie CLEANING burning contains Tempe Volume- Total Ste kV from or ozone burning ratrata naya ste- stump gani in ha in- in the zone soon stump clean- human call tali kata growth, h- ¹ ochi- ki from ΚΟΜΠΟ- mixtures congestion Liza- stock ozone Nenta g / m ^e ϊ “ΜηΟ ₂ Torah, from or % ________ wt.X ' from a component % Duration · Residency · Experience, h 1 Acetone 0.1 2.1 6 31.1 0.27. 10 20 5000 99.6 100 350 2. m ”· 0.15 2,4 9 37.8 0.41 10 20 10,000 .100 100 350 3 _ t) _ 0.2 2,4 9 37.6 0.40 10 20 20000 99.8 100 350 4 0.2 2.6 12 fifty 0.73 thirty 60. 15,000. 100 100 350 5 0.2 2.6 12 fifty 0.73 60 100 20000 100 100 350 6 _m ^P _m 0.2 2.6 12 fifty 0.73 60 20 . 20000 99.8 100 350 7 . ¢ 1 0.1 - - - 0.73 10 ²⁰ 5000 93 (.2 100 fifty 8 • w ^P - 0.1 - - - 0.73 60 20 10,000 85.7 100 85 9 - 0.1 - - - 0.73 60 100 20000 91.1 100 200 Table continuation Experience Organic component The content of the organic component in the gas mixture, g / m ³ Barrier Discharge Zone Deep Catalytic Zone Long- Frequency kHz Voltage ^ kV The degree of purification from the organic component, % The ozone content of the gas mixture, g / m ³ ί 1 resident of- _J the content in the catalyst? -MnO ₂ oil 1 The temperature in the catalyst zone ° C Volume velocity, h “ ¹ The total degree of purification from the organic component 2 The degree of purification from ozone, X experience, h 10 _ and _ 0.2 ' - - - 0.73 60 100 20000 77.4 100 120 eleven Ethanol 0.1 2.1 6 34.2 0.32 10 20 5000 99.8 100 350 12 - ⁿ - 0.15 2,4 9 38.7 0.43 .10 20 10,000 100 100 350 thirteen ^P 0.2 2,4 9 38.8 0.42 10 20 20000 99.9 100 350 14 * ”- 0.2 2.6 12 53.6 0.68 thirty 60 15,000 100 100 350 fifteen - ”- 0.2 2.6 12 53.6 0.68 60 100 20000 100 100 350 16 _ ” 0.2 2.6 ¹² 53.6 0.68 60 20 20000 99.9 100 350 17 - ⁿ - 0.1 - - - 0.68 10 20 5000 87.5 100 80 18 - - 0.1 - 0.68 60 20 100С0 86 100 115 19 - ¹¹ - 0.1 - - - 0.68 60 100 20000 93.1 100 200 2Q ♦ __ 0.2 - - 0.68. 60 100 20000 75.6 100 150 21 Methanol 2.1 - - - 0.68 40 thirty 15120 98 100 300 Editor S. Patrusheva Compiled by G. Vinokurov Tehred A. Kravchuk Corrector A. Zimokosov Order 5073/8 Circulation 656 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and printing company, Uzhhorod, st. Project, 4