Coal tunnel kiln from exhaust gas

A type of coal-fired kiln that takes advantage of the heat from the exhaust after the burning process, has just been successfully produced and mastered by Master Pham Thi Thuy Phuong and colleagues of the process and equipment department.

Do not use wood to burn but the furnace is still red with pyrolysis gas - (Photo: P.NHI)

It is a pyrolysis coal furnace with three chambers: the combustion chamber, the chamber takes advantage of the exhaust gas and the coal chamber.

The combustion chamber and the heat-utilizing chamber are designed to be interconnected, support each other, the coal chamber will be designed separately to maximize efficiency and avoid product damage. Coal-fired kilns from this waste will consume very little energy, reducing up to 75% of harmful gases discharged into the environment and reducing by about 2/3 of the time of finished products.

According to the results of acceptance of the topic: 'Research on environmentally friendly technology' of the scientific council established by Soc Trang Department of Science and Technology, the average coal efficiency of pyrolysis furnace is nearly 40 %, sometimes even 60%, nearly twice as high as traditional tunnel kiln production.

Comparing the impact on the environment, harmful gases such as CO, NOx, SO2, NO, dust are minimized to the maximum. For example, NOx has decreased from 4.312ppm to 20ppm, SO2 from 532ppm to 4ppm .