Denitration agent capable of improving SNCR (Selective Non Catalytic Reduction) denitration efficiency and preparation method of denitration agent

Abstract

The invention belongs to the treatment field of smoke nitric oxides and in particular relates to a denitration agent capable of improving SNCR (Selective Non Catalytic Reduction) denitration efficiency. The denitration agent is prepared from the following raw materials in parts by weight: 20-30 parts of calcium magnesium acetate, 10-20 parts of ferric oxide, 5-10 parts of titanium oxide, 1-5 parts of manganese dioxide, 0.1-1 part of cerium oxide, 40-65 parts of water and 5-15 parts of hydroxypropyl methyl cellulose. By utilizing catalytic properties of nanoscale oxide catalysts and precipitation property of the calcium magnesium acetate, the denitration agent is added in a reducing agent, thus further improving the denitration efficiency of an SNCR denitration system, enabling the denitration efficiency of the SNCR denitration system to reach more than 85% and greatly reducing the initial investments and the operation cost of owners in denitration treatment of smoke; the invention also provides a preparation method of the denitration agent. The preparation method is reasonable in process, low in cost and easy to produce industrially.

Description

technical field [0001] The invention belongs to the field of treatment of flue gas nitrogen oxides, and in particular relates to a denitration agent for improving SNCR denitration efficiency and a preparation method thereof. Background technique [0002] The atmosphere is the most basic element of life for human beings to survive. Due to the rapid economic growth, the pollution caused by coal burning is becoming more and more serious. The SO produced in the flue gas of coal burning 2 and NO x It is the main air pollutant and the main cause of acid rain. At the same time, NO x It is also a substance that causes environmental problems such as ozone layer destruction and photochemical smog. These have become important factors restricting social development; all countries have been committed to the research of denitrification technology. Among the denitrification technologies studied at home and abroad, there is mainly selective catalytic reduction. (SCR for short), selective ...

AI Technical Summary

Problems solved by technology

The reducing agent is sprayed into the area where the temperature of the combustion chamber is 850°C-1100°C, and the reducing agent (urea) is rapidly thermally decomposed into NH 3 SNCR reaction with NO in the flue gas to generate N 2 Compared with the SCR denitrification technology, the characteristics of this process are: the initial investment cost and operating cost are low, only one-fifth of SCR, but its denitration efficiency is low. The denitrification efficiency of SNCR is only 40-60%, while the denitrification efficiency of SCR reaches More than 80%