SU791400A1 - Method of cleaning gases from sulfur anhydride - Google Patents

Description

one

This invention relates to a process for the purification of gases from sulfur dioxide used in the manufacture of sulfuric acid.

A known method of purification from sulfuric anhydride by absorption of gases with a solution, which is a mixture of ammonium sulfite and ammonium bisulfite with a ratio in solution of 0.7 M, equal to 0.7, followed by decomposition of ammonium sulfite bisulfite solution with sulfuric acid. However, the method is complicated in hardware flj.

The closest to the described technical essence and the achieved result is another well-known method of purifying gases from sulfuric anhydride, which consists in absorbing the latter with a solution of sulfuric acid containing manganese ions in an amount of 0.03-0.05 wt.% With simultaneous supply of ozone into the gas in the amount of O, O05O, O08 vol.%.

The drawbacks of the method are the low degree of gas purification from serium anhydride (9 O-95%) and the need for large volumes of absorption apparatus P1 1 2.

The purpose of the invention is to increase the degree of purification and simplify the instrumentation.

The goal is achieved by the fact that gases are absorbed by a solution of sulfuric

10 acids in the presence of manganese ions and ozone with the additional introduction of ionically pyvalent vanadium.

The difference of the method is the introduction of the ions of ptlncfgr- into the solution of sulfuric acid.

15th Vanadium.

It is advisable at the same time to introduce vanadium ions in the amount of O, OOOZ - O, OO1 weight. %, manganese ions - in the amount of О, О1-0, О25 wt.%, ozone - in the amount of О, ОО1-0, ООЗ vol.%.

Claims (2)

This makes it possible to increase the degree of purification of gases from sulfuric anhydride to 95.5-98.5% and simplify the process by reducing the number of ozonator head. With the introduction of vanadium, manganese and ozone ions in the amount of less than the lower suggested limit, the purification rate will decrease to 92–95%, while the increase in the number of introduced components is impractical because the purification rate does not increase, but the consumption of expensive components increases. Example 1. Sulfuric acid waste gas, composition,% by volume:, 2; About 8; Ni91.8 in the amount of 160000 nm V4 is fed to the first absorption tower, irrigated with 30% - oh (sulfuric acid with 0 content in it, O1% Mn. Ozone in the amount of 0.001% to the total volume of gas to be purified is introduced into the liquid phase. Residual and O is captured in the second absorption tower, irrigated with 10% acid. In the absorption towers, two valence ions of valence are in the amount of 0, OOO% by weight. The degree of gas purification from sulfuric anhydride is 95.5%. the leading gas of the sulphate production of the composition, vol.,%, 2; O 8 ;., 8 in the amount of 1b HOOO HM / h is fed to the first absorption the tower, irrigated with 20% acid with a content of 0.017 wt.% Mp. Ozone in the amount of O, OO2 vol.%. to the total volume of the gas being cleaned is introduced into the liquid phase. The residual $ O2 is coagulated the second absorption tower, irrigated with 10% acid. Pyvalent vanadium ions are introduced into the absorption towers in an amount of 0, OOO7 wt.% The degree of gas purification from sulfur dioxide is 96.7%. - Example 3. Sulfuric acid off gas production composition,% by volume: About 0.2; About 8,) i2.1,8 in the amount of 160000 nm 4/4 is served in the first absorption tower, irrigated with 309 o-sulfuric acid with a content of 0.025 wt.%. Mp Ozone in the amount of 0.003 vol.% To the total volume of gas to be purified is introduced into the liquid phase. The residual 5 Oj is caught in the second absorption tower, irrigated with 10% acid. Bivalent vanadium ions are introduced into absorption towers in an amount of 0.001 wt.%. The degree of purification of sulfur dioxide gas is 98.5%. Invention 1. A method for purifying gases from sulfuric anhydride by absorbing it with a solution of sulfuric acid in the presence of manganese ions and ozone, which, in order to increase the degree of purification and simplify the instrumentation of the process, is additionally introduced into the solution of sulfuric acid. pivalent vanadium ions. 2. A method according to claim 1, characterized in that vanadium ions are introduced in an amount of 0.0003-0.001 wt.%, Manganese ions in an amount of 0.010, 025 wt.%, Ozone in an amount of 0.001-0.003% by volume. Information sources. taken into account during the examination 1.Kuzmin G.A., Chertkov B.A. Industry of mineral fertilizers and sulfuric acid. Ref. inf. NIUIF, No. 8, 3, 1971. 2. Authors certificate of the USSR 322911, cl. C O1 B 17 / 6O, 05.Ab.71 (prototype).