In order to achieve fuel efficiency during the start-up of a circulating fluidized bed boiler, it is essential to minimize the ignition time from the initial stage to when the fuel exits the system. The shorter this period, the less fuel is consumed, making it a key strategy for economical operation. Therefore, expediting the exit of fuel from the system plays a significant role in reducing fuel usage.
Another critical factor affecting fuel consumption during start-up is the temperature of the air entering the furnace. Since a large volume of air is required for both fluidization and combustion support, it is important to heat the primary and secondary air as much as possible. By activating the first and second air heaters early in the process, the furnace temperature can be maximized, which helps reduce the amount of auxiliary fuel needed.
The particle size distribution of the bed material also has a major impact on performance. If too many large particles are present, it increases the fluidization air requirement, leading to higher power consumption and potential stratification. This can slow down the load increase later on, while also reducing the number of fine particles that leave the bed. On the other hand, coarse particles have a higher heat storage capacity, contributing more to the dense phase zone’s thermal content, which helps raise the bed temperature more quickly and improves fuel economy.
However, if too many fine particles are carried into the dilute phase zone, they can circulate extensively within the furnace, enhancing convective heat transfer with the water-cooled walls. This results in a faster load increase in the later stages, but the bed temperature rises slowly, delaying the point at which coal injection can begin, thus increasing fuel consumption.
Therefore, maintaining an appropriate bed material particle size is crucial for successful start-up, fuel savings, and energy efficiency. Our factory currently implements strict control over the particle size distribution of the bed material.
As the main heat carrier in a circulating fluidized bed boiler, the bed material plays a vital role. If the bed layer is too thin, it may lead to uneven air distribution, causing localized channeling and failure to ignite properly. Additionally, an uneven temperature field increases the risk of coking. Conversely, if the bed is too thick, although it enhances heat storage and stabilizes the bed temperature, it also increases the total heat storage, prolongs the ignition time, and leads to greater heat and power losses.
Thus, selecting an optimal bed material thickness during start-up can significantly reduce fuel and power consumption. Based on practical experience, we maintain a bed pressure of around 5 kPa at startup, with a resting bed thickness of approximately 600 mm. This balance ensures efficient heat transfer, stable ignition, and improved overall performance.
Lead Acid Battery Replacement
The OREMA LFP series lithium battery is built using advanced LiFePO4 cells, which have been specifically engineered to offer a superior alternative to traditional lead acid batteries. This innovative battery has been designed to address the limitations of lead acid batteries by providing a lighter, more powerful, and longer-lasting solution.
Compared to lead acid batteries, LiFePO4 batteries have a significantly longer lifespan and can endure up to 10 times the number of charge-discharge cycles. This extended cycle life makes them an excellent choice for applications that require frequent and sustained power usage over an extended period of time.
One of the key advantages of the OREMA LFP series lithium battery is its reduced weight. Weighing only 40% of an equivalent lead acid battery, this LiFePO4 battery is ideal for applications that prioritize mobility and portability. Whether it's in marine, RV, or automotive applications, the lighter weight of the LiFePO4 battery allows for easier handling and installation, without compromising on power output.
Furthermore, the OREMA LFP series lithium battery offers exceptional power delivery. With its higher power density, this battery can provide a consistent and reliable power supply, making it suitable for a wide range of applications, including electric vehicles, solar energy storage systems, and off-grid power solutions.
In summary, the OREMA LFP series lithium battery is a game-changer in the world of energy storage. Its LiFePO4 cells offer a longer lifespan, increased cycle durability, and superior power density compared to traditional lead acid batteries. With its reduced weight and exceptional power output, this battery is an ideal choice for applications that require a lighter and more mobile solution without compromising on performance.
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