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Five factors affecting the use of incinerators
Hits: 1340 times Added: 2018-1-26 [ Print ] [ Return ] [ Favorite ]
As the incinerator is put into use, the understanding of the incinerator is getting deeper and deeper. In order to ensure the effect and requirements of the incinerator, the design of the equipment has successively adopted methods such as raising the chimney, configuring the blower and the induced draft fan, etc. To meet the demand for combustion air in the incineration process.

Here are some aspects that affect the effect of the incinerator.


1. Dwell time Dwell time has two meanings: one is the residence time of the garbage in the incinerator, which refers to the time required for the garbage to be discharged from the furnace from the beginning of the furnace to the end of the incineration, and the second is the waste incineration The residence time of the flue gas in the furnace refers to the time required for the flue gas generated from the waste incineration to escape from the garbage layer to be discharged from the incinerator. In the actual operation process, the residence time of the waste in the furnace must be longer than the theoretical drying, The total time required for thermal decomposition and combustion. At the same time, the residence time of the incineration flue gas in the furnace should ensure that the gaseous combustibles in the flue gas reach complete combustion. When other conditions remain the same, the longer the residence time, the better the incineration effect. However, if the residence time is too long, the throughput of the incinerator will be reduced, which is unreasonable economically. If the residence time is too short, excessive incomplete combustion will be caused.

2.Turbulence

Turbulence is an indicator of the degree of mixing of garbage and air. The greater the degree of turbulence, the better the degree of mixing of garbage and air. Organic combustibles can fully obtain the oxygen required for combustion in time. The more complete the combustion reaction, the turbulence is affected by various factors. Impact, when the incinerator is constant, increasing the air supply can increase the turbulence, improve the mass and heat transfer effect, and be beneficial to incineration.

3. Excess air coefficient

Excess air coefficient has a great influence on the status of garbage combustion. Supplying appropriate excess air is a necessary condition for the complete combustion of organic matter. Increasing the excess air coefficient can not only provide excess oxygen, but also increase the turbulence in the furnace, which is beneficial to incineration. However, an excessively large excess air coefficient may reduce the temperature in the furnace, bring side effects to incineration, and increase the energy required for transporting air and preheating. If the actual air volume is too low, the garbage will not be burned completely, and then Bring a series of adverse consequences to the incineration plant.

4. Nature

For example, the calorific value and the size of the garbage are the main factors affecting the waste. The higher the calorific value, the easier the combustion process is and the better the incineration effect. The smaller the size of the garbage composition, the specific surface area per unit mass or volume of garbage. The larger the contact area between the garbage and the surrounding oxygen is, the better the heat and mass transfer effect during the incineration process is, and the more complete the combustion is. On the contrary, the mass and heat transfer effect is poor, and incomplete combustion is prone to occur.

5.Temperature

Due to the large volume of the incinerator, the temperature distribution in the furnace is uneven, that is, the temperature in different parts is different. The incineration temperature mentioned here refers to the highest temperature that can be reached by waste incineration. The larger the value, the more incineration effect Well, generally speaking, the temperature in the area above the garbage layer and close to the combustion flame is the highest, which can reach 800-1000 C. The higher the calorific value of the garbage, the higher the incineration temperature that can be reached, the more conducive to the incineration of the garbage. Temperature and residence time are a pair of correlation factors. At higher incineration temperatures, the residence time can be shortened appropriately to maintain a good incineration effect.