Thermal Modification Kiln

Thermal Modification Kiln

In the thermal modification kiln, the wood undergoes a processing stage at elevated temperatures spanning from 160°C to 250°C (320°F to 482°F) in an oxygen-free environment. This heat-treated modification mechanism significantly enhances the wood’s inherent characteristics, improving dimensional stability, boosting resistance to decay and weathering. The resulting eco-friendly wood is not only highly durable but also has an appealing and uniform color. 

 

Hardwood, Softwood and Bamboo

160 - 250 °C (320 - 482 ℉) Heat Treatment

Thermal Break and Air Circulation Tech

Durable and Safe

Thermal Modification Kiln Specification

SpecificationDetails
ModelHMY/HMD
Capacity20 – 40m³ (Customizable for other sizes)
Maximum Temperature 
inside the Kiln
250 ℃ (482℉)
Applicable Lumber TypesSoftwood, Hardwood and Bamboo
Loading Method Rail and Trolley
Kiln Structure Material304 Stainless Steel Inner Wall
Heating MediumElectricity / Thermal Oil
Site RequirementsIndoor / Under Shelters
Thermal Modification Kiln Specification

Thermal Modification Kiln Specification

SpecificationDetails
ModelHMY/HMD
Capacity20 – 40m³ 

Maximum Temperature Inside the Kiln

250 ℃ (482℉)

Applicable Lumber Types

Softwood, Hardwood, and Bamboo

Loading MethodRail and Trolley
Kiln Structure Material304 Stainless Steel Interior
Heating Medium

Thermal Oil/ Electricity

Site RequirementsIndoor 

Features of Thermal Modification Kiln

IMG 6417 Thermal Modification kiln

Air Circulation Technology

External motor with the unique design of the fan shaft structure and bearing lubrication enables the fans to be positioned anywhere within the kiln as required. This allows for precise regulation of the air dynamic circulation, ensuring a uniform heat flow distribution. Consequently, the drying uniformity and efficiency of the lumber are enhanced.

Energy Saving and Safe Operation

 Thermal Break Technology

 With a 150–200mm high-performance insulation layer and advanced thermal break technology, the system effectively minimizes heat loss by interrupting heat conduction paths through the kiln structure. 

ASTM 304 stainless steel interior for wood kiln

Construction for Enhanced Durability

The interior of the kiln is made of 304 stainless steel, offering excellent corrosion resistance and a long service life.

Inert Gas Protection-Free Design

✅ ​Designed for high efficiency and energy savings, the system eliminates the need for inert gas protection like steam, reducing energy consumption and simplifying operation.

 Safe Operation

During the thermal modification process, gases flow outward only, preventing oxygen from entering and greatly reducing the risk of ignition.

 Smart Control

✅ ​The smart control system enables precise regulation of temperature and humidity. It enables remote control and real time data management , ensuring user friendly, along with high efficiency and energy conservation.

What is Thermal Modification or Heat Treatment of Wood?

Definition: Wood carbonization (thermal modification) refers to the heat treatment of wood at high temperatures ranging from 180 to 250 °C.

Principle:  High – temperature degrades hemicellulose in wood. The generated organic acids speed up the degradation of hemicellulose and cellulose’s amorphous regions, reducing hygroscopic hydroxyl groups and increasing the crystalline region, thus enhancing dimensional stability. Degradation produces organic acids and phenolic compounds that inhibit decay – causing fungi, strengthening decay resistance. With fewer hygroscopic hydroxyl groups, the wood’s outdoor moisture content variation lessens. High – temperature treatment also creates photo – aging – resistant compounds, improving weather resistance. Difference from Surface Carbonization: It is not surface carbonization for decoration only, but uniform carbonization across the whole wood cross – section.

Product and Its Advantages: The product is thermally – modified wood (carbonized wood), boasting excellent dimensional stability, decay resistance, and weather resistance. 

Application: It is especially suitable for geothermal floors and outdoor use.

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