SU767024A1 - Method of waste gas purification from ammonia - Google Patents

Description

(54) METHOD FOR CLEANING COKE GAS FROM AMMONIA

one

A known method of cleaning coke oven gas from ammonia by indirect heating in chambers, where ammonia vapors are heated to 1000 ° C and both; They are heated by flue gases burned in special channels. The decomposition products do not contain nitrogen oxides 1.

The disadvantage of this method is the high heat consumption due to heat transfer losses through the wall.

. The closest in technical essence Q. and the achieved result is a method of cleaning coke gas from ammonia, and ammonia pyrolysis by contacting coke gas with a high-temperature gas stream of fuel combustion 2.15

The disadvantage of this method is the presence of harmful impurities in the waste gases.

The aim of the invention is to eliminate the content of harmful impurities in the exhaust gases.

The goal is achieved by the fact that in 20 of the proposed method of purifying a coke oven from ammonia by ammonia pyrolysis by contacting coke oven gas with a high-temperature gas stream of burning fuel, the coke oven gas containing ammonia is in contact with the gas stream at 950-1100 ° C outside the chamber.

PRI me R. Npj native gas of 0.45 m / h with air is supplied to the combustion chamber (an air excess factor of 1.1); in gases, escaping: from the furnace device, the content of nitrogen oxides is 0.2 t / nm. To the gases — products of combustion (temperature 1000 ° C) —– ammonia is supplied in the amount of 10 g / h outside the combustion chamber. The content of nitrogen oxides in the exhaust gases is 0.2 g / nm, the content of ammonia is traces

The use of the proposed method of thermal decomposition of ammonia in comparison with a known method provides a reduction in the content of nitrogen oxides during the purification of waste gases, which reduces the cost of installation of equipment for the purification of gases.

Claims (1)

Invention Formula The method of purification of coke oven gas from ammonia by ammonia pyrolysis by contacting with 3 7670244 coBOf About gas with high-temperature. Gas-by-sources of information, fuel combustion current, I distinguish the sheeses taken into account in the examination by the fact that, in order to make the contents of harmful impurities in waste gases, coke basin, co-1. Patent of Germany No. 1230406, cl. 12 K 1/00, holding ammonia in contact with gas lio-j 1967 current at 950-1 lOOC outside the combustion chamber 2, UK patent N 1069751, fuel C 1 A, 1968 (prototype).