Equipment Overview

The chain‑plate pyrolysis furnace independently developed by Jufeng Company is a single‑layer, oxygen‑free pyrolysis furnace that employs continuous pyrolysis equipment driven by chain plates. Through technologies such as indirect heating, continuous conveyance, and zone‑specific temperature control, it achieves stable, efficient, and clean conversion of solid waste—making it particularly well suited for large‑scale, standardized solid waste treatment projects. The comprehensive advantages of the chain‑plate pyrolysis furnace in realizing “reduction, harmlessness, and resource utilization” have secured its important position in the field of solid waste treatment.

Operation Procedure of the Chain-Plate Anaerobic Pyrolysis Furnace

The core principle of the chain‑plate pyrolysis furnace is to carry out the processes of drying, pyrolysis, and cooling on slowly moving chain plates under anaerobic or oxygen‑deficient conditions via indirect heating, ultimately breaking down large‑molecule organic materials into small‑molecule combustible gases, tar, and solid residues (biochar). The operational process can be divided into the following stages:

1. Feeding and Sealing: The pre‑processed material (typically requiring low moisture content and uniform particle size) is fed into the furnace via a dedicated feeding device, such as a screw feeder or a star valve. Key Point: The feeding device must have excellent sealing performance to prevent outside air from entering the pyrolysis furnace and disrupting the anaerobic environment.

2. Drying Section: After the material enters the furnace, it first passes through the drying section. In this zone, the residual heat from the furnace body or dedicated hot air is used to indirectly or directly heat the material, evaporating most of the free water and a portion of the bound water within the material. The purpose of drying is to reduce the moisture content of the material, prepare it for subsequent pyrolysis reactions, and minimize energy consumption.

3. Pyrolysis Section: This is the core stage of the entire process. After drying, the material is conveyed on a high‑temperature, slow‑moving chain conveyor and enters the high‑temperature pyrolysis section. The high‑temperature flue gases generated by the furnace walls or built‑in burners flow through the air ducts beneath the chain plates or the interlayer of the furnace chamber, transferring heat to the chain plates and the material resting on them via indirect radiation and convective heat transfer. 
Under anaerobic conditions and at high temperatures (typically 400–850°C), the organic matter in the feedstock undergoes complex pyrolytic chemical reactions, releasing volatile substances (pyrolysis gas) while the remaining portion is transformed into solid char (biochar). The main components of pyrolysis gas include combustible gases such as H₂, CH₄, and CO, as well as tar and water.

4. Cooling and Discharge After pyrolysis is complete, the solid residue (biochar) moves along the chain plate into the cooling section. The cooling method can be either indirect cooling via a water jacket or direct cooling with a small amount of inert gas. Once thoroughly cooled, the residue is discharged from the furnace through a discharge device, such as a star discharger or a wet slag remover. Both cooling and discharge must maintain the system’s airtight integrity.

5. Pyrolysis Gas Treatment and Utilization The pyrolysis gas generated in the pyrolysis section is extracted and subjected to a series of purification processes—such as cyclone dust removal, spray cooling, and electrostatic oil capture—to remove dust and heavy tars. The purified pyrolysis gas boasts a high calorific value and is typically fed into burners as auxiliary fuel, providing heat for the pyrolysis process and enabling energy self-sufficiency. Any excess heat can also be used for power generation or heating.

Chain-Plate Pyrolysis Furnace – Photo