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High-temperature draft fans

Their core function is to extract high-temperature flue gas generated in industrial furnaces, boilers, incinerators, etc., while regulating system pressure, making them key equipment in high-temperature flue gas treatment systems.

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Description

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Product Description

High-temperature draft fans are specially designed for conveying high-temperature gases. Their core function is to extract high-temperature flue gas generated in industrial furnaces, boilers, incinerators, etc., while regulating system pressure, making them key equipment in high-temperature flue gas treatment systems.

Key Features

1. Strong High-Temperature Resistance: This is its most critical feature, capable of long-term stable operation in high-temperature environments ranging from 300°C to 1200°C (specific temperature tolerance depends on material and design). Some special models can withstand even higher temperatures for short periods.

2. Corrosion and Wear Resistance: To counteract dust and acidic gases (such as SO₂) potentially present in high-temperature flue gas, the flow components (impellers, casing) are often made of corrosion-resistant and wear-resistant materials, reducing failures caused by wear and corrosion.

3. High Wind Pressure Adaptability: Designed to overcome resistance in long-distance ducts, dust collectors, heat exchangers, and other equipment, it emphasizes enhancing wind pressure to ensure smooth flue gas conveyance.

Main Types (Categorized by Structure)

Type Features Applicable Scenarios

Centrifugal High-Temperature Draft Fan High wind pressure, stable airflow, motor isolated from high-temperature flue gas to prevent overheating damage, relatively complex structure Large furnaces (such as cement rotary kilns, steel heating furnaces), boilers, scenarios requiring long-distance high-temperature flue gas conveyance or high system resistance.

Axial High-Temperature Draft Fan Large airflow, compact size, easy installation, relatively lower wind pressure, some models can achieve reverse flow cooling (lowering motor temperature) Medium and small furnaces, waste incinerators, tunnel kilns, scenarios with low system resistance and limited installation space

Mixed Flow High-Temperature Draft Fan Combines advantages of centrifugal and duct types, broad adaptability of wind pressure and airflow, higher efficiency Medium wind pressure and airflow requirements, energy-saving high-temperature exhaust scenarios (such as glass furnaces, ceramic kilns)

Key Materials (Selected Based on Temperature Requirements)

Temperature Range Common Materials Characteristics

300°C-600°C Carbon Steel (Q235), Manganese Steel (16Mn) Low cost, suitable for medium-low temperatures and weak corrosive flue gas scenarios

600°C-900°C Stainless Steel (304, 310S), Heat-Resistant Steel (Cr25Ni20) Good high-temperature resistance and corrosion resistance, suitable for medium-high temperatures and slightly corrosive flue gas scenarios

900°C-1200°C Nickel Alloys (such as Inconel series), Ceramic Coated Materials Extreme high-temperature resistance and anti-high-temperature oxidation, suitable for ultra-high temperatures (such as metallurgical blast furnaces, waste incinerator waste heat boilers) or highly corrosive flue gas scenarios, higher cost

Typical application scenarios:

Industrial furnaces such as cement kilns, steel furnaces, ceramic kilns, and glass furnaces, extracting high-temperature flue gas after combustion. Energy and environmental protection: boilers, waste incinerators, biomass combustion furnaces, combined with desulfurization, denitrification, and dust removal systems to treat high-temperature exhaust gases. Special industries: non-ferrous metal smelting furnaces, chemical reaction furnaces, conveying flue gas containing special high-temperature media.

Key points for operation and maintenance

Before startup, check to ensure sufficient high-temperature lubricating grease (such as molybdenum disulfide-based lubricating grease) in the bearings, no jamming of the impeller, no deformation of the casing, and intact sealing components (such as high-temperature gaskets). Avoid cold-state overload: when starting, the flue damper must be opened first to prevent the fan from starting in a 'pressurized' state (high temperatures can cause excessive force on the impeller, leading to damage); when shutting down, cooling must be done first to avoid sudden cooling of high-temperature components, which can cause deformation. Regular maintenance: clean the accumulated dust inside the impeller and casing every 1-3 months (high-temperature dust tends to adhere and form clumps, affecting balance and airflow); check the bearing wear every 6-12 months, and replace aged sealing components and lubricating grease. Temperature monitoring: install temperature sensors at the fan's air intake and bearing housing to monitor the flue gas temperature and bearing temperature in real-time, and shut down promptly if overheating occurs for protection.

Zibo Hongcheng Fan Co., Ltd. specializes in producing over 50 series of fans and more than 600 specifications and models, offering a complete range of specifications and models. Custom production and processing according to drawings are available. Welcome to contact us for cooperation.

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Products

Products

How do fan shafts impact industrial efficiency?

How do blowers advance environmental protection?

How do high-temp gas fans improve industrial efficiency?

How are corrosive gas fans innovating sustainability?

What’s the role of induced draft fan furnaces?

What’s the role of induced draft fan furnaces?

High-temperature draft fans

Description

marker

Product Description

Key Features

Main Types (Categorized by Structure)

Typical application scenarios:

Key points for operation and maintenance

contact us

Related popular products

Desulfurization fans

An auxiliary combustion fan

Impeller of a centrifugal fan

Kiln exhaust fan

Roof axial fans

Dual Inlet Centrifugal Fan

Boiler centrifugal induced draft fans

Wear-resistant centrifugal fans

XQ-type inclined chute high-pressure centrifugal fan

Roots blower

FBD series (dⅠ) explosion-proof pressure-injection counter-rotating axial flow local ventilation fan

Titanium fans

Axial flow fans

K and DK series of mine energy-saving axial flow fans

HTF type fire smoke exhaust axial fan

Coal gas booster fan

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