Carbon steel denitrification tower

Structural Composition

Tower body: Adopt steel structure or concrete structure. The cylindrical design bears pressure and ensures uniform gas flow.

Air inlet and air outlet: The inlet is arranged at the lower part for stable flue gas intake; the outlet is set on the top for purified gas discharge.

Catalyst layer: Composed of multi-layer catalyst modules such as vanadium-titanium catalyst to accelerate chemical reactions of nitrogen oxides.

Ammonia injection system: Consists of ammonia storage tank, evaporator, pipelines and nozzles for uniform ammonia spraying.

Monitoring device: Equipped with temperature sensors, pressure sensors and NOx detectors to monitor and adjust operating parameters in real time.

Working Principle

Selective Catalytic Reduction (SCR): Under 300-400℃, ammonia acts as a reducing agent. Catalysts promote the reaction between ammonia and nitrogen oxides to generate nitrogen and water.

Selective Non-Catalytic Reduction (SNCR): Under 850-1100℃, reducing agents such as ammonia and urea are sprayed into flue gas. NOx is converted into nitrogen and water without catalysts.

Performance Characteristics

High denitrification efficiency: Effectively remove nitrogen oxides to meet environmental emission standards.

Simple operation: Stable operation with low maintenance cost. Partial denitrification agents can be recycled to save energy and cost.

Types and Applications

Equipment types: Vertical tower, vertical-flow tower and horizontal-flow tower for different flue gas volume.

Application fields: Widely used in thermal power plants, steel mills, chemical plants and oil refineries to treat NOx-containing flue gas.

Practical Application Cases

Wet denitrification tower: Composed of gas distributor, liquid distributor, spraying device and demister. It features low liquid-gas ratio, low power consumption and low operating cost.