Coke oven gas desulfurization equipment using dry process and SCR medium-low temperature denitrification

Coke Oven Gas (COG) Dry Desulfurization and Low-Nitrogen Removal Equipment (SCR)

A coke oven gas (COG) desulfurization and denitrification equipment with dry desulfurization (SDS) and Selective Catalytic Reduction (SCR) for medium and low temperature applications is an efficient environmental protection device for treating coke oven gas. It is primarily used for removing sulfur dioxide (SO₂) and nitrogen oxides (NOx) from the gas, ensuring compliance with emission standards. Below are the detailed specifications of this equipment:

Technical Principle

• ‌SDS Dry DesulfurizationInjection of sodium bicarbonate (NaHCO₃) as an efficient desulfurizing agent into the desulfurization reaction zone, where it reacts with sulfur dioxide (SO₂) in flue gas to produce sodium sulfate (Na₂SO₄) and carbon dioxide (CO₂), thereby achieving desulfurization.

• ‌Low Temperature Denitrification in SCRAt temperatures ranging from 180 to 310°C, NOx in flue gas is reduced to nitrogen (N₂) and water (H₂O) through a catalyst, achieving denitrification.

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Process Flow

1. ‌Desulfurization stageThe coking flue gas enters the SDS dry desulfurization system to remove SO₂.

2. ‌Dust removal stageThe smoke passes through a bag dust collector, removing particulates.

3. ‌Denitrification phaseSmoke enters the medium and low temperature SCR reactor to remove NOx.

4. ‌Emission StageProcessed clean flue gas is discharged through the chimney.

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Equipment Specifications

• ‌Desulfurization EfficiencySOX emission concentration ≤ 50 mg/Nm³.

• ‌Denitrification efficiencyNOX concentration ≤ 500 mg/Nm³, ammonia emissions ≤ 8 ppm.

• ‌Reaction TemperatureThe SCR denitrification reaction temperature for medium and low temperatures ranges from 180°C to 310°C.