Hood annealing furnace is a commonly used heat treatment equipment, widely used in the annealing process of metal materials, especially in the field of cold rolled strip annealing, hood annealing furnace because of its ability to provide high quality annealing treatment, energy saving, improve production efficiency and suitable for a variety of materials and processes, and has been widely used in industrial production.
The technological process of the cover annealing furnace mainly includes: charging, sealing the furnace cover, heating to annealing temperature, heat preservation, cooling, discharge. This process ensures that the metal material is evenly heated and cooled in a protective atmosphere to achieve improved material properties. However, the hood annealing furnace will produce nitrogen oxide NOx during the high temperature heating process, and in the combustion process, especially in the high temperature heating stage, the high temperature generated when the fuel used in the furnace burns makes oxygen and nitrogen react to produce nitrogen oxides. In order to effectively control the production of nitrogen oxides, low nitrogen combustion technology, flue gas recycling and tail gas denitrification system are needed to reduce the emission of nitrogen oxides.
The flue gas denitrification technology provided by Green Valley Environmental Protection is mainly the selective catalytic reduction SCR denitrification technology, which can reduce nitrogen oxides NOx into harmless nitrogen N₂ and water H₂O under a certain temperature and catalyst, thus significantly reducing the emission of NOx. The SCR denitration control system of Green Valley Environmental Protection integrates advanced control technology and environmental protection process, and realizes accurate control and optimization of denitration process through the introduction of intelligent elements. The system covers key components such as catalyst, ammonia injection system and control system, and adopts patented mixing technology to ensure full mixing of ammonia and flue gas. Automatic adjustment of ammonia injection amount and injection time to achieve the best denitrification effect, according to the furnace temperature and the concentration of nitrogen oxides, precisely control the injection amount of urea water, to ensure that the flue gas can be accurately discharged after the SCR denitrification processor. The system has alarm function, can respond to potential risks in time, and through data acquisition management, remote control and online transmission, improve the reliability and security of the system.
In practical applications, Green Valley’s denitrification technology has been successfully applied in several projects, such as:
Project: RTF annealing furnace denitrification renovation project of a metallurgical enterprise
Process: SCR denitration
Air volume: 14335Nm³/h
Temperature: 200-350℃
Emission index: NOx decreased from 162.5mg/Nm³ to 15mg/Nm³
Green Valley environmental denitrification technology with its high efficiency, economy and a wide range of industry applications, has become an important force in the field of environmental protection, to achieve the ultra-low emissions of industrial emissions to provide a strong technical support.
Post time: Jan-04-2025