The working principle of the silo milling system in the power plant 10

Intermediate silo milling system.

Characteristics of silo pulverizing system: The operation of the coal mill is only related to the powder level of the pulverized coal silo, which can always maintain the economic output operation; Compared with the direct blowing pulverizing system, the system increases the pulverized coal silo and corresponding equipment for storing pulverized coal, namely fine powder separator, screw pulverizer, reversing valve, moisture suction pipe, air lock, etc.; The amount of pulverized coal required for combustion is provided and controlled by the powder feeder;

The desiccant separated by the fine powder separator is called"Lack of breath", exhaust gas contains a small amount of pulverized coal (10% 15%), more moisture, and the temperature is lower; In order to protect the environment, the exhaust gas is not allowed to be discharged into the atmosphere, and there are two treatment methods in the silo milling system, that is, it is used to transport pulverized coal, which is called desiccant powder delivery, see Figure 4-18(a), or directly sent to the furnace for combustion, which is called"Three winds", see Figure 4-18(b); A part of the exhaust gas after being pressurized by the powder exhaust fan is sent to the coal mill"Recirculating air"It is used to coordinate the ventilation volume and coal grinding output.

How the system works when the mill is stopped.

The coal mill first grinds the coal into pulverized coal, and stores the qualified pulverized coal in the silo through coarse separation and subdivision, and the powder of the pulverizer mixes the pulverized coal with a primary air through the pulverizer and enters the furnace for combustion through the burner, and the biggest advantage of the intermediate silo type is that the coal machine can run under the best working conditions and is not affected by the boiler load.

Intermediate silo milling system.

Features of the silo milling system:

The operation of the coal mill is only related to the powder level of the pulverized coal silo, which can always maintain the economic output operation;

Compared with the Zhichang Teasing and Blowing Pulverizing System, the system increases the pulverized coal silo and corresponding equipment for storing pulverized coal, namely fine powder separator, screw pulverizer, reversing valve, moisture suction pipe, air lock, etc.;

The amount of pulverized coal required for combustion is provided and controlled by the powder feeder;

The desiccant separated by the fine powder separator is called"Lack of breath", exhaust gas contains a small amount of pulverized coal (10% 15%), more moisture, and the temperature is lower; In order to protect the environment, the exhaust gas is not allowed to be discharged into the atmosphere, and there are two treatment methods in the silo milling system, that is, it is used to transport pulverized coal, which is called desiccant powder delivery, see Figure 4-18(a), or directly sent to the furnace for combustion, which is called"Three winds", see Figure 4-18(b);

A part of the exhaust gas after being pressurized by the powder exhaust fan is sent to the coal mill"Recirculating air"It is used to coordinate the through-resistance such as air volume and coal grinding output.

How the system operates the finger pin when the mill is stopped.