Dry denitrification tower

General introduction: The dry denitrification tower is a key equipment for removing nitrogen oxides from flue gas. It adopts dry denitrification technology and has the advantages of small floor space and no wastewater discharge.

Detailed introduction is as follows:

Working Principle

The dry denitrification tower usually adopts Selective Catalytic Reduction (SCR) or Selective Non-Catalytic Reduction (SNCR) technology. SCR technology uses reducing agents such as ammonia or urea to reduce nitrogen oxides into nitrogen and water under the action of catalysts. SNCR technology directly injects reducing agents into high-temperature flue gas for reduction reaction without catalysts.

Structural Composition

Reactor body: Vertical steel structure with internal supporting structure for catalyst beds.

Catalyst bed: Composed of multi-layer catalyst modules, serving as the core reaction area.

Flue gas inlet and outlet: Equipped with guide plates at the inlet to stabilize gas flow.

Ammonia injection device: Used for spraying reducing agents into the tower.

Dilution air system: Dilute the reducing agent to ensure uniform distribution.

Control system: Monitor and adjust various operating parameters.

Types

According to technological process and flue gas characteristics, dry denitrification towers are divided into cyclone reactors, fixed bed reactors and fluidized bed reactors. Each type has unique structure, performance and application scope.

Advantages

Compact structure and small floor space; simple operation and stable operation. No additional water treatment facilities are required, and no secondary pollution is generated.

Application Fields

Widely used in boilers and kilns in electric power, metallurgy, building materials and chemical industries. It effectively reduces nitrogen oxide emissions to meet environmental protection standards.