Product Overview
The Water-Cooled Exhaust Duct is a critical component of the off-gas handling system in electric arc furnaces (EAF), submerged arc furnaces (SAF), and other metallurgical furnaces. It is designed to safely and reliably convey extremely high-temperature furnace off-gas to downstream dust collection or gas treatment systems.
By incorporating a circulating water-cooling system into the duct structure, the water-cooled exhaust duct effectively controls the duct wall temperature, preventing thermal damage, burn-through, and structural deformation. This proven design is widely adopted in modern high-power electric furnace off-gas systems.
Technical Features
1. High-Temperature-Resistant Steel Structure
Manufactured from heat-resistant steel or structural steel with high mechanical strength, suitable for severe high-temperature and thermal shock operating conditions.
2. Integrated Internal Water-Cooling Channels
Cooling water circulates within the duct walls, continuously removing heat transferred from high-temperature exhaust gas, effectively controlling the external surface temperature.
3. Optimized Flow Path and Structural Design
The exhaust gas flow resistance is properly controlled to reduce dust accumulation and localized erosion, supporting long-term stable system operation.
4. High Compatibility with Dust Collection Systems
The duct can be connected to baghouse filters, wet scrubbers, and other dust collection systems, facilitating integrated off-gas system design.
Product Advantages
- The water-cooled structure significantly reduces duct wall temperature, preventing burn-through and deformation commonly associated with conventional steel ducts under high-temperature conditions.
- A stable exhaust gas channel helps maintain furnace negative pressure and balanced gas flow, supporting continuous furnace operation.
- Effective cooling in high-temperature zones reduces thermal impact on expansion joints, downstream ducting, and dust collection equipment.
Application
Electric Arc Furnaces (EAF)
Submerged Arc Furnaces (SAF)
Alloy Smelting Furnaces and Pilot / Research Furnaces
High-Temperature Metallurgical Off-Gas Treatment Systems
FAQ
Q1: Where is the water-cooled exhaust duct typically installed?
A: It is usually installed in the high-temperature zone between the furnace or furnace roof exhaust outlet and the dust collection system.
Q2: Why is a water-cooling structure required?
A: Off-gas temperatures from EAF and SAF systems are extremely high. Water cooling effectively protects the duct structure and improves overall system safety.
Q3: Can the water-cooled exhaust duct be customized?
A: Yes. The duct can be custom-designed based on off-gas temperature, gas flow rate, interface dimensions, and site-specific conditions.
Q4: Is the cooling water system complex to operate?
A: With proper design and standardized operation, the cooling system is stable, reliable, and easy to maintain.
Q5: Is it suitable for retrofit projects of existing furnaces?
A: Yes. It is commonly used to solve high-temperature damage issues in existing exhaust duct systems.
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