The desulfurizing agent uses calcium hydroxide as the base

material, supplemented with active components. During

production, the strength and activity/efficiency of the

desulfurizing agent should be optimized based on the actual

sulfide concentration at the application site to achieve an optimal

balance. The production process includes dry mixing, wet

mixing, extrusion molding, and drying (including foaming). Dry

and wet mixing must ensure uniform blending, while extrusion

requires controlled pressure to tailor product strength for the

project’s operational needs. Post-drying, the material must be

free of residual moisture to guarantee efficiency.

Low initial investment (including civil engineering

costs) and low operational power consumption (no flue gas

heating required).

Solid waste is calcium

sulfate (gypsum), which is easy to handle and recyclable.

Future compatibility with ammonia-free

denitration agents for integrated desulfurization and denitration.

Medium-to-low-temperature flue gas

treatment in steel, coking, and cement industries.

The SDS dry desulfurization method introduces flue gas into a

reaction tower, followed by a pure dry desulfurization system

(NaHCO₃). Ultrafine sodium bicarbonate particles are injected

into the reaction tower, where they decompose under hightemperature flue gas to form highly reactive sodium carbonate,

carbon dioxide, and water. The highly reactive sodium carbonate

fully interacts with acidic components such as SO₂ and SO₃ in

the flue gas, enabling the solidification and removal of So₂.

Addresses supply shortages

and rising costs, reducing operating costs by 30%.

Effective across 35–350°C (no

additional heating required).

Medium-to-low-temperature flue gas

treatment in steel, coking, and cement industries.

The SDS dry desulfurization method introduces flue gas into a

reaction tower, followed by a pure dry desulfurization system

(NaHCO₃). Ultrafine sodium bicarbonate particles are injected

into the reaction tower, where they decompose under hightemperature flue gas to form highly reactive sodium carbonate,

carbon dioxide, and water. The highly reactive sodium carbonate

fully interacts with acidic components such as SO₂ and SO₃ in

the flue gas, enabling the solidification and removal of So₂.

Addresses supply shortages

and rising costs, reducing operating costs by 30%.

Effective across 35–350°C (no

additional heating required).

Eliminates grinding equipment; calciumbased ultrafine powder is directly conveyed via pneumatic

transport.

Reduces power consumption and maintenance costs for grinding

mills.

By-products are calcium salts (easily managed).

SCR (Selective Catalytic Reduction) denitration is a widely

adopted method. However, this approach requires an ammonia

storage and delivery system, where ammonia (a toxic hazardous

material) acts as a reducing agent to achieve denitration. The

storage and transportation of ammonia are complex, and

ammonia slip can cause environmental pollution. The fixed-bed

dry denitration method offers an alternative by using ammoniafree denitration agents loaded into the system. Through a

catalytic-oxidation-adsorption mechanism, nitrogen oxides

(NOx) are effectively removed.For projects already utilizing

fixed-bed desulfurization, ammonia-free denitration agents can

be directly added without additional equipment, enabling NOx

removal.For combined desulfurization and denitration needs, a

fixed-bed integrated desulfurization-denitration system can be

deployed. This involves co-loading desulfurizing and

denitration agents (in layered arrangements) within a single

tower to simultaneously remove SOx and Nox.

Inner Mongolia Sending EP&ES Co., Ltd.