Sintering Furnace Flue Gas Fixed Bed Dry Desulfurization Process Equipment

The fixed bed dry desulfurization process equipment for the heating furnace of a rolling steel mill is an efficient and environmentally friendly flue gas treatment technology, particularly suitable for the co-management of high concentrations of particulate matter and sulfur compounds. The following introduces it from aspects such as technical principles, application cases, and policy support:

I. Technical Principle and Advantages

Desulfurization Mechanism

Utilizing a calcium-based fixed bed dry desulfurization process, the SO₂ in flue gas is first oxidized to SO₃, which then reacts with the desulfurizing agent (mainly Ca(OH)₂) to form calcium sulfate (gypsum). This process also has dust collection and suppression capabilities, effectively reducing particulate matter emissions to <5mg/m³.

Core Advantages

Low operating costs: The system has low resistance, low energy consumption, and no need for additional heating fuel.

‌Small footprint: Modular design for space-limited environments.

By-products are recyclable: Solid waste such as calcium sulfate can be utilized for resource recovery.

‌Maintenance-Free Design: No need for additional posts, easy to repair‌.

Section II: Application Cases

Changzhou XX Steel Project

Utilizing calcium-based fixed bed dry desulfurization technology, the original flue gas particulate matter concentration is 100-150 mg/m³, and the treated outlet particulate matter is <5 mg/m³, with sulfur compounds meeting the standard concurrently.

Fangda 9 Steel Renovation Project

Invested 57 million yuan, adopting square fixed-bed dry desulfurization technology, expected to achieve ultra-low dust emissions after commissioning, contributing to the creation of an A-grade environmental protection performance enterprise.

Section 3: Policy and Technical Support

The country encourages: The fixed bed dry desulfurization process is included in the "Directory of Major Environmental Protection Technology Equipment for Development Encouraged by the State (2023 Edition)."

‌Technical Extension: The process allows for space reservation for denitrification agent filling, enabling future upgrading to sulfur and denitrification integration without the need for boiler shutdown modification._

Four, Applicable Scenarios

High Particulate Emissions Smoke: When the original flue gas from steel rolling furnace contains high dust, the dry process can simultaneously achieve efficient dust removal.

‌Area with Limited Space: Modular design suitable for irregular site layouts.‌

In summary, the fixed-bed dry desulfurization process offers both technical maturity and economic feasibility for flue gas treatment in steel rolling furnace heating, making it an ideal choice for achieving ultra-low emissions.