At the DISMAK sawmill, located in the town of Chaguaramas, Anzoátegui State, the project for the construction of a two-chamber kiln for wood drying, initiated by the client years ago, was resumed and completed, which contemplated the use of a common pit located in the middle, using biomass for combustion, thus generating the heat required for drying.
The power supply line is taken from a 25kVA single-phase 13.8kV:220V ratio transformer, and the main power supply to the sawmill is through a 150kVA 13.8kV:440V ratio transformer bank.
The system consists of two equal drying chambers to extract moisture from the wood by applying a uniform airflow at a temperature between 60°C and 80°C. The chamber measures 4.5 meters deep, 8.9 meters wide and varies in height from 5.5 meters at the front to 5 meters at the bottom.
Each chamber is equipped with:
- Thermal insulation in walls and ceiling, made with mineral wool and aluminum sheets.
- The floor consists of a concrete slab with embedded IPN beams that serve as rails to hold up to 4 wooden carts in each chamber at the same time.
- Heat exchanger compartment equipped with a fan to force air through a 4″ tube bundle, and a Beckett model CF800 burner with Genisys 7505 controller.
- 4 fans mounted on a truss located in the upper central part of the chamber, with reversing direction of rotation, to maintain uniform temperature and air flow inside the chamber.
- Control and power board, with temperature measurement through thermocouple, the board is equipped with PLC logo for temperature control, changing the direction of the fans periodically. It is also equipped with all the protection devices for motors and electrical components.
- Internal and external lighting.
The development of this project allows the drying of 50 m3 of sawn timber, each kiln has a capacity of 25 m3, thus generating greater operational continuity to the customer, allowing to achieve the fulfillment of production and planned deliveries.