Analysis of the Furnace Wall Structure of a Small-Scale Garbage Incinerator

Today, as environmental protection and resource recycling are increasingly valued, the design and optimization of the furnace wall structure of a small-scale waste incinerator as a highly efficient device for treating domestic waste is particularly important. As the core component of the incinerator, the furnace wall not only bears the huge thermal stress caused by high-temperature combustion. It also needs to have good corrosion resistance, wear resistance and pressure resistance to ensure the safe and stable operation of the incinerator.

Small-Scale Garbage Incinerator

The furnace wall structures of small-scale waste incinerators are diverse and have their own characteristics. Among them, the water-cooled fireplace wall stands out with its unique design. This furnace wall structure forms a protective layer around the furnace through water pipes. The water flowing inside the water pipes can effectively absorb the heat in the furnace and prevent the furnace wall from overheating. The water-cooled fireplace wall has a simple structure, is easy to maintain, and has a long service life. However, it has high requirements for water quality, and proper water treatment and anti-scaling measures need to be taken to maintain heat transfer efficiency.

The membrane fireplace wall is another furnace wall structure worthy of attention. It consists of closely arranged tubes with no welding points between the tubes, forming a continuous airtight wall surface with cooling air flowing inside. The membrane wall has a compact structure, high temperature resistance, good corrosion resistance, and is particularly suitable for environments with high heat loads. However, its cost is relatively high and its maintenance difficulty is greater than that of a water-cooled fireplace wall.

Traditional refractory brick furnace walls still have a place in small waste incinerators. This furnace wall structure is built with refractory bricks, and can withstand different temperatures depending on the type of refractory bricks. Refractory brick furnace walls are low in cost and easy to maintain, making them suitable for small incinerators. However, the durability is relatively poor, especially when the furnace temperature is high or the temperature fluctuates greatly, the refractory bricks may be damaged quickly.

High-temperature resistant castable furnace walls are also favored by some small waste incinerators for their convenient and fast construction, good integrity, high temperature resistance and wear resistance. However, once damaged, it is difficult to repair and requires professional technology and equipment.

Composite furnace walls combine the advantages of the above-mentioned furnace wall structures, such as using different materials for the inner and outer layers, or combining water-cooled walls and refractory materials. This furnace wall structure combines the advantages of different materials and has better thermal efficiency and durability. However, the design and construction are complex, and the cost is relatively high, and it is necessary to comprehensively consider the design parameters, operating conditions and economic analysis of the incinerator.

During the operation of a small-scale waste incinerator, the furnace wall is heated, and there is a temperature difference between the inside and outside, which leads to large internal stress in the furnace wall. In particular, the furnace wall in the high-temperature area tends to bulge and bulge into the furnace. This is closely related to factors such as furnace wall design, overload operation, process temperature control, frequency of furnace start-up and shutdown, and operating level. Therefore, when selecting the furnace wall structure, it is necessary to comprehensively consider the actual situation of the incinerator to ensure the heat resistance, corrosion resistance and pressure resistance of the furnace wall material.

In addition, small-scale waste incinerators are prone to ash accumulation, wear and corrosion during operation. The adhesion and coking of fly ash will cause serious damage to the refractory materials of the furnace wall, and even cause the furnace wall to deform and collapse. Therefore, in the design of the furnace wall structure, fly ash cleaning and protection measures must also be considered to ensure the safe operation of the incinerator.

In summary, the design of the furnace wall structure of a small-scale waste incinerator is a complex and important process. It is necessary to comprehensively consider factors such as the scale, processing capacity, expected service life, operating costs, and environmental protection requirements of the incinerator. Choose the most suitable furnace wall structure and suitable refractory materials. At the same time, it is necessary to strengthen the maintenance and maintenance of the furnace wall to extend the service life of the furnace wall and improve the overall operation efficiency of the incinerator.