Introduction to combustion control of garbage incinerators

The combustion status of the waste incinerator is an important guarantee for the safe, stable and economical operation of the system. After the waste is dehydrated, fermented, and stirred, the waste enters the incinerator. After three stages of drying, combustion and combustion, the organic gases and volatile gases in the exhaust gas are completely burned at high temperatures to form carbon dioxide gas and release heat.

However, in the actual combustion process, due to the unstable calorific value of the garbage, the combustion conditions of the incinerator change, it is impossible to achieve the expected effect, resulting in incomplete combustion. In severe cases, a large amount of black smoke, toxic and harmful gases will be produced, and the slag of the incinerator also contains organic combustibles.

Factors affecting waste incinerators include: the nature of the waste, residence time, temperature, turbulence, air excess coefficient and other factors. Residence time, temperature, and turbulence (disturbance) are known as the "3T" factors and are the main indicators of incinerator performance.

The nature, residence time, temperature, turbulence degree and excess air coefficient of the waste are analyzed, and used to guide the operation management and operation of the waste incinerator.

page1 The nature of garbage
The calorific value, composition and size of domestic waste are the main factors affecting the incineration of domestic waste.

The higher the calorific value, the easier the combustion process is and the better the incineration effect. The smaller the size of the composition of domestic waste, the better the effect of domestic waste per unit mass or volume, and the more complete the combustion; On the contrary, the mass and heat transfer effects are poor, and incomplete combustion is prone to occur.

The incoming garbage stays in the storage pit for a certain time, and through the process of natural compression and dehydration and partial fermentation catalysis, the calorific value of the incoming garbage is increased, and the incineration effect of the garbage is improved, which is also the key to the quality of garbage incineration. [The garbage should be sampled when entering the factory, and the garbage in the storage pit should be fully stirred to achieve the homogenization of fuel]

Incoming domestic waste is not directly sent to the garbage incinerator, but must go through the process of storage. Set up garbage storage pits, one is to store incoming garbage, which plays a role in regulating the amount of garbage; The second is to mix, mix, dehydrate and other treatments of garbage, which plays a role in regulating the nature of garbage.

In addition, the incoming garbage stays in the storage pit for a certain time, and the water content of the garbage can be reduced through natural compression and partial fermentation, so as to produce the reaction catalysis of the garbage in advance and improve the incineration effect of the garbage.