The harm caused by positive pressure combustion of boilers is mainly manifested in the following aspects

Circulating fluidized bed boiler adopts circulating fluidized bed combustion (CFBC) technology, that is, the fuel is burned in fluidized state, and the materials flying out of the furnace are collected by the gas-solid separator and returned to the furnace for circulating combustion and utilization. Circulating fluidized bed combustion is a high-efficiency, low-pollution clean combustion technology with the advantages of wide fuel adaptability, excellent environmental performance, wide range of load regulation and easy comprehensive utilization of ash, etc. It is one of the most practical and feasible high-efficiency and low-pollution combustion equipment at present.

1. Induce accidents and reduce boiler thermal efficiency. When the boiler is under positive pressure combustion, high-temperature flue gas in the furnace will enter the insulation layer of the boiler along the cracks in the furnace wall, causing the insulation layer to burn out. This will heat up the pressure bearing components of the boiler, such as the downcomer, which cannot be heated, damaging the water circulation of the boiler, and inducing accidents such as boiler water-cooled wall tube explosions.

2. Destroy the normal combustion of boiler coal seams. The positive pressure combustion of the boiler will cause high-temperature flue gas to move forward along the grate in the coal seam, cross the coal gate and drill out in the coal hopper, causing the ignition point to move forward and ignite the coal in the coal hopper, resulting in a coal hopper burning accident. Some furnace workers have to frequently water the coal hopper. The normal combustion of coal seams in the furnace is destroyed.

3. Deterioration of the operating environment. Positive pressure combustion of the boiler will cause high-temperature flue gas to drill out of gaps such as observation doors and observation doors and enter the boiler room, exposing operators to dust, toxins, and high temperatures in the flue gas. Deteriorating the operating environment.

4. Waste of electrical energy. Due to the air leakage of the boiler, a large amount of cold air is mixed into the flue gas, increasing the amount of flue gas and reducing the flue gas temperature. Causes a significant overload of the induced draft fan, which in severe cases can cause the induced draft motor to burn down. As a result, it leads to an increase in electricity consumption and a waste of electricity.

In summary, the positive pressure combustion of the boiler first indicates that the boiler is likely to have malfunctioned, and secondly, the harm caused by the positive pressure combustion of the boiler is also significant, seriously affecting the safe operation of the boiler. Therefore, boiler inspection, management, and operators should attach great importance to the phenomenon of positive pressure combustion in boilers. Timely identify and eliminate the cause of boiler positive pressure combustion to prevent boiler accidents and ensure safe operation of the boiler.

The above is the answer to this question from Jiangsu Sifang Clean Energy Equipment Manufacturing. If you have any doubts about other boiler related issues, please consult Jiangsu Sifang Clean Energy Equipment Manufacturing online customer service or call 0516-85532690. Jiangsu Sifang Clean Energy Equipment Manufacturing professional technical personnel will promptly answer your questions.