Aerogel Felt Baking Tunnel Oven (550°C)

The Aerogel Felt Baking Tunnel Oven (550°C) is a specialized industrial continuous heating system designed for the high-temperature processing of aerogel insulation mats/felts, including continuous cross-linking, modification, aging, solvent evaporation, and high-temperature drying during the manufacturing process.The equipment typically adopts a conveyor belt or mesh chain conveying system and can achieve a maximum operating temperature of 550°C. It is widely used in large-scale continuous production lines for advanced thermal insulation materials.

Core Applications

1. Deep Solvent Evaporation

Used before or after the supercritical drying stage of aerogel production to efficiently remove residual alcohol or organic solvents trapped inside the porous structure.

2. Surface Hydrophobic Modification

At controlled temperatures of 500°C–550°C, the equipment promotes deep thermal reactions between modifying agents and silica sources, ensuring that aerogel felt achieves excellent:

Water resistance

Hydrophobic performance

3. Thermal Stability and Aging Treatment

Through high-temperature curing and heat treatment, internal stress between the substrate (such as glass fiber and ceramic fiber) and aerogel structure is eliminated, improving mechanical stability and long-term performance.

4. Continuous Mass Production

Integrated with aerogel felt production lines to achieve seamless continuous processing from:

Coating

Impregnation

Baking and thermal treatment

Applicable Equipment and Industry Standards

GB/T 34336-2017

Nano-porous Aerogel Composite Thermal Insulation Products

The baking and thermal treatment performance must meet the requirements for:

Thermal conductivity

Hydrophobic rate

Thermal insulation performance

of aerogel insulation products.

GB 5226.1-2019

Electrical Safety of Machinery — Electrical Equipment of Machines

Regulates:

Electrical control systems

High-temperature safety protection requirements

GB/T 30839.1-2014

Energy Classification of Industrial Electric Heating Equipment

Provides guidance for:

Thermal insulation performance

Energy efficiency evaluation

Heat loss control during 550°C high-temperature operation

Explosion-Proof Safety Standards

Such as the GB 3836 series standards

Due to the presence of flammable organic solvent evaporation during baking, the equipment must meet strict explosion-proof and exhaust ventilation requirements.

Core Features

1. Extreme Thermal Insulation Technology

The furnace body adopts specially designed multi-layer high-temperature insulation materials between the outer shell and the 550°C heating chamber, typically including:

Aerogel insulation materials

High-alumina fiber materials

This effectively minimizes heat loss and improves energy efficiency.

2. Precise Temperature Control and Uniform Heating

The equipment adopts:

Multi-zone independent temperature control

Microcomputer PID control

SSR solid-state relay control

High-performance high-temperature long-shaft circulation fans

The forced hot air circulation system ensures that the temperature difference inside the furnace is controlled within ±3°C.

3. Explosion-Proof Design and VOC Exhaust Treatment

The equipment is equipped with:

Independent organic exhaust gas ventilation systems

Solvent concentration monitoring

Alarm linkage systems

These systems prevent combustible gases such as alcohol vapor from accumulating and causing explosion risks during high-temperature processing.

4. High-Temperature Resistant Conveying System

The conveying components, including:

Conveyor chains

Mesh chains

Rollers

are made of high-temperature-resistant stainless steel materials such as:

SUS310S

SUS316L

to ensure long-term stable operation without deformation under continuous 550°C high-temperature conditions.

FAQ

Q1: Why does aerogel felt baking require a high temperature of up to 550°C?

A:After solvent drying, aerogel materials often require high-temperature treatment at 450°C–550°C to complete molecular chain cross-linking.

This temperature range can also:

Remove residual organic impurities

Stabilize hydrophobic functional groups

Improve long-term hydrophobic performance

Enhance fire resistance and high-temperature durability of aerogel felt

Q2: How does the equipment ensure that the conveyor system does not fail or deviate under 550°C high temperature conditions?

A:The equipment does not use conventional PTFE (Teflon) mesh belts at such high temperatures. Instead, it uses special heat-resistant stainless steel conveyor systems, such as:

SUS310S stainless steel mesh chains

SUS316L stainless steel components

The transmission system is also equipped with:

Counterweight tensioning devices

Automatic deviation correction systems

External bearing cooling structures

to handle thermal expansion and maintain stable operation under high-temperature conditions.

Q3: A large amount of ethanol and other solvents may evaporate during baking. How does the equipment prevent explosion risks?

A:The furnace is designed with:

Explosion-proof doors

Pressure relief vents

High-volume forced exhaust systems

Fresh air supply systems

The equipment continuously monitors gas concentration inside the furnace. When the concentration exceeds the safety limit, it can automatically:

Shut down the heating system

Increase exhaust ventilation

to ensure that combustible gas concentration remains far below the Lower Explosive Limit (LEL).

Q4: High-temperature equipment usually consumes a lot of energy. What are the main energy-saving designs?

A:Energy-saving measures mainly include two aspects:

1. High-Performance Thermal Insulation

The furnace uses:

Extra-thick insulation layers

Ultra-low thermal conductivity materials

to reduce heat loss from the furnace body.

2. Heat Recovery System

The equipment can integrate:

Hot air circulation regeneration systems

Exhaust heat recovery devices

The discharged hot air can be reused to preheat incoming materials, reducing overall energy consumption by approximately 20%–30%.

Q5: How does the equipment ensure uniform temperature throughout a wide tunnel furnace?

A:The equipment achieves high temperature uniformity through:

Multi-point independent PID temperature control

Side and top alternating hot air circulation systems

Independent heating elements and high-temperature fans in each zone

The air duct system is optimized through Computational Fluid Dynamics (CFD) simulation, ensuring that hot air forms a uniform curtain-like airflow across the aerogel felt surface and minimizes temperature differences throughout the furnace.

The 550°C Aerogel Felt Baking Tunnel Oven provides a high-performance thermal processing solution for advanced insulation material manufacturers. With features including ultra-high temperature capability, precise temperature control, explosion-proof safety design, energy recovery technology, and continuous automated operation, it is widely used in the production of next-generation thermal insulation materials for aerospace, automotive, energy storage, construction, and industrial applications.