Coconut shell biochar pyrolysis machine

Coconut Shell biochar pyrolysis machine is an industrial equipment specially used to efficiently convert carbon-containing organic waste such as coconut shells into biochar (i.e. carbonized material). Compared with traditional intermittent carbonization kilns, this equipment has the characteristics of high degree of automation, low energy consumption, stable production capacity, and excellent environmental performance. It is particularly suitable for large-scale carbonization production in areas with abundant coconut shell resources.

Main process methods and key control points of coconut shell pyrolysis machine

1.Classification of pyrolysis processes

According to different heating methods and equipment, coconut shell carbonization can be divided into the following processes:

①Traditional furnace carbonization

Principle: Pile coconut shells in a closed earth kiln, control the oxygen supply after ignition to make them slowly carbonize.

Features:

Temperature range: 300-600℃ (low and uneven).

Charcoal yield: 20%-30%, but the quality is unstable and the ash content is high.

Suitable for small-scale production, low cost but high pollution.

②Continuous rotary kiln carbonization

Principle: Coconut shells are constantly rolling in a tilted rotary kiln, and are evenly carbonized by heat.

Features:

Temperature range: 500-800℃, with precise temperature control.

Charcoal yield: 25%-35%, low volatile matter (<10%), suitable for high-quality charcoal production.

Suitable for industrial continuous production.

2.Pyrolysis process flow

Regardless of the equipment used, coconut shell carbonization usually includes the following steps:

①Raw material pretreatment

Crushing: Coconut shells are crushed to 2-5cm to improve pyrolysis uniformity.

Drying: Moisture content is controlled at <15% (too high will reduce thermal efficiency).

②Carbonization stage

Heating: Heating to the target temperature (usually 400-700℃) at 10-20℃/min.

Insulation: Maintain for 1-3 hours to ensure sufficient pyrolysis.

Atmosphere control: Oxygen-deficient environment (O₂<2%) to prevent combustion.

③ Cooling and collection

Quick cooling: Water cooling through a double-layer drum cooler to prevent spontaneous combustion of charcoal.

Product separation:

Solid charcoal: Screened and packaged (can be further activated to make activated carbon).

Combustible gas: Purified and recovered for heating of continuous carbonization furnace.

Biochar pyrolysis machine technical parameter：