GB/T 33058-2016 in English

Interpretation of the standard for tail gas treatment in the production of dilute nitric acid

With increasingly stringent environmental protection requirements, the treatment of tail gas in the production of dilute nitric acid has become the focus of the industry. This article will be based on the national standard GB/T33058-2016 "Treatment and disposal methods for tail gas in the production of dilute nitric acid", and will explain in detail its technical specifications and implementation points.

Comparison of standard frameworks

Background of Standard Formulation and Analysis of Technological Evolution

With the country's emphasis on air pollution control, nitrogen oxides (NOx) produced in the production process of dilute nitric acid has become one of the main pollutants. Traditional tail gas treatment methods are difficult to meet increasingly stringent environmental protection requirements, so there is an urgent need to formulate targeted technical standards.

This standard is developed based on the ammonia selective catalytic reduction (SCR) technology. This technology uses a catalyst to cause ammonia and NOx to react chemically to produce nitrogen and water, and has the advantages of high denitrification efficiency and flexible operation.

Implementation Recommendations

1. Based on the existing production equipment, gradually transform the tail gas treatment system, and give priority to the use of ammonia purge gas as a reducing agent. 2. Regularly monitor catalyst activity and process parameters to ensure stable denitrification efficiency. 3. Establish an emergency response mechanism and immediately take shutdown or other remedial measures when tail gas emissions exceed the standard.