In recent years, the wood processing industry in Bangladesh has developed rapidly, with furniture manufacturing, plywood production, and building materials industries continuing to expand. However, the industry has always faced 2 major challenges: the need for stable high-temperature heat sources in the production process, and the high cost of importing fossil fuels. Especially in the production of plywood, reliable thermal energy is required in key processes such as veneer drying, hot pressing (usually requiring temperatures of 220 ° C-250 ° C), and adhesive curing. Traditional steam systems often require high-pressure operation to reach these temperatures, which not only increases safety risks but also drives up operating costs. A large plywood manufacturer in Dhaka, Bangladesh put forward specific requirements to Sitong boiler: a thermal oil heating system that can provide a stable thermal power of 1800 kW using the large amount of wood waste generated by its own production line as fuel, while meeting the industry's stringent temperature and safety requirements. After a comprehensive evaluation, Sitong boiler provided the customer with a set of customized YGL-1800SCII series vertical type thermal oil heater.
 


This YGL series thermal oil heater from Sitong boiler can run at low pressure (0.8 MPa) and achieve a working temperature of up to 350 ° C, which is essentially safer than high-pressure steam boilers. Vertical design can minimize footprint to the greatest extent possible - a key advantage for factories with limited boiler room space. The technical team of Sitong boiler simultaneously optimizes its flue gas flow, which can effectively improve heat transfer efficiency. The active grate system supports flexible fuel supply and can burn various biomass fuels such as coal, wood, sugarcane bagasse, straw, rice husk, etc. In this project, the main fuel source is the wood waste generated daily by the plywood factory, including sawdust, scraps, and bark. The system adopts the principle of forced circulation: after the heat transfer oil is heated in the furnace, it is transported to the production equipment (hot press, dryer) by the circulation pump, releases heat energy, and returns to the furnace for reheating, forming a closed-loop cycle. The system reliably provides heat transfer oil at 240 ° C-260 ° C to the hot pressing process, which consumes approximately 90% of the total heat energy generated in plywood production. Controlling temperature fluctuations within ± 2 ° C can ensure stable quality of the board and significantly reduce the scrap rate. The picture shows the delivery site of the boiler.
 
More information on LinkedIn:
https://www.linkedin.com/feed/update/urn:li:activity:7476168699737952256
Delivery video on YouTube:
https://www.youtube.com/watch?v=B88-TAHITis