Pulverized coal is used in modern thermal power plants. It is a powdered form of coal i.e., coal that is grounded into a dust-like size. The pulverized coal is then conveyed to the furnace by way of a stream of hot air. An important purpose of pulverization is to expose a large surface area to oxygen, thus aiding in the burning process. This article will discuss the advantages and disadvantages of pulverized coal firing.
Advantages and Disadvantages of Pulverized Coal Firing
Advantages of pulverized coal firing
There are many benefits associated with pulverized coal, such as
1. This increases the efficiency of the boiler in a significant way.
2. It becomes possible to use different types of low-grade coal in order to generate electricity.
3. The temperature of steam can be raised in a shorter period of time.
4. An automatic control system can easily be implemented for the combustion of pulverized coal.
5. With or without gas and oil, this system works effectively.
6. When compared to a stoke firing system, this system is capable of releasing a large amount of heat.
7. Compared to the stoke firing system, the banking losses are relatively low.
8. It provides the ability to control and alter the rate of combustion quickly to meet the changing load requirements.
9. There is a very small amount of excess air that is required.
10. It is possible to use preheated air with success.
11. It is possible to start up the boiler in cold conditions within a very short time.
12. Pulverizing equipment is located outside of the furnace. The pulverizing equipment can therefore be repaired without having to cool it down.
Disadvantages of pulverized coal firing
There are some disadvantages that come with pulverized coal firing, such as
1. A higher investment cost is associated with the plant.
2. A substantial percentage of the ash passes up the chimney and disperses throughout the surrounding area.
3. The majority of the ash must be precipitated through special efforts.
4. The possibility of an explosion is more likely to occur since coal burns more like a gas than a solid.
5. Powdered coal must be stored with special attention and protected against fire hazards at all times.
6. It is critical to know that there is a risk of explosion. As a result, skilled personnel is necessary to carry out the job.
7. There is a significant increase in the plant’s auxiliary power consumption.
8. Electrostatic precipitators are required in order to reduce stack emissions to levels that are acceptable in the plant.
9. There is a lot of extra equipment that needs to be installed, such as mills, burners, etc.
10. Slag accumulates in the lower rows of boiler tubes. It is necessary to use special equipment in order to remove this slag.
What is pulverization, and why is it important?
Pulverization is the process of grinding a material into a fine powder. This process is important for a variety of reasons. One reason is that it can make handling and transporting material easier. For example, pulverizing coal makes transporting and burning it in a power plant easier. Pulverization can also improve the reactivity of a material, which can be important in chemical reactions. Additionally, pulverizing a material can increase its surface area, making it more susceptible to chemical reactions and more effective in certain applications.
What is pulverized coal firing system?
In a pulverized coal firing system, coal is ground into fine particles and blown into a furnace, which is burned to generate heat. This type of system is typically used in power plants and is designed to provide a high level of heat input to the boiler.
In a pulverized coal system, the coal is ground into a fine powder using grinding mills, then blown into the furnace, where it is burned. This allows for more efficient and complete combustion of the coal, which can improve the overall efficiency of the power plant.
What are the advantages of a pulverized coal firing system?
There are several advantages to using a pulverized coal firing system. One advantage is that it can provide a high level of heat input to the boiler, which can improve the efficiency of the power plant. This system can also easily adjust to meet changing power demand and burn many coal types. Additionally, pulverized coal can be easily transported to the burners making the system more efficient.