Waste Slag Management with help of air blaster in CFBC Boiler Dharamraj Saini 1 , Gareema Waraich 1 , Chandan Kumar 2 , Rupesh Unninathan 3 , Emarti Kumari 4 1 Assistant Manager, Dept. of Operation JSW Energy Ltd. Barmer & JSW Township Barmer, Rajasthan (India) 2 Manager, Dept. of Operation JSW Energy Ltd. Barmer & JSW Township Barmer, Rajasthan (India) 3 Manager, Dept. of Operation JSW Energy Ltd. Barmer & JSW Township Barmer, Rajasthan (India) 4 Assistant Professor, Department of mechanical Engineering, MBM University, Ratanada, Jodhpur ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract – This research paper addresses the issue of excess ash content in CFBC boilers when lower quality fuel, such as the lower or upper layer of lignite, is supplied. The increase in ash content leads to the continuous draining of bed ash and often results in the restriction of bed material flow in the furnace inlet pipe to the slag cooler. While this may not have a significant impact on the required load in normal conditions, it can severely affect the unit's load capacity in the case of poor-quality coal. The paper proposes a solution for waste slag management using air blasters in 135 MW CFBC boiler, which can effectively prevent the choking of inlet pipes and ensure uninterrupted operation at the required load capacity. The implementation of this solution has the potential to significantly improve the operational efficiency and reliability of CFBC boilers, particularly when using lower quality fuels. Key Words: CFBC Boiler, Waste Management, Air Blaster, Slag, Bed Material Draining. 1. Introduction The utilization of low-quality fuel sources such as lignite in circulating fluidized bed combustion (CFBC) boilers has become increasingly common due to the depletion of conventional high-quality fuel sources. However, the use of such fuels often results in the production of a higher quantity of ash, which can create operational challenges for CFBC boilers. One of the significant challenges faced by these boilers is the choking of the inlet pipe from the furnace to the slag cooler due to the formation of excess ash content. This can cause a reduction in load capacity, leading to significant economic losses. This research paper addresses the issue of waste slag management in CFBC boilers and proposes a solution to prevent the choking of the inlet pipe using air blasters. The proposed solution aims to improve the operational efficiency and reliability of CFBC boilers while utilizing low-quality fuel sources. The study highlights the operational challenges faced by CFBC boilers when lower quality fuels are utilized. Also discussed impact on the unit's to run at required load capacity. In this article, studied a significant implication of the power generation industry. This study will be very useful to improve the efficiency and reliability of CFBC boilers, particularly when using low-quality fuels. 2. Literature Review Circulating fluidized bed combustion (CFBC) boilers have emerged as a promising technology for power generation due to their high fuel flexibility and lower emissions compared to conventional boilers. However, the utilization of low-quality fuel sources such as lignite, which is abundant in many regions, has posed challenges for the efficient and reliable operation of CFBC boilers. The production of excess ash content during the combustion of low-quality fuels can lead to operational challenges, including the choking of the inlet pipe from the furnace to the slag cooler. Numerous studies have been conducted to investigate the impact of low-quality fuels on the performance of CFBC boilers. A study by Basu et al. (2015) found that the utilization of lower quality fuels such as lignite can result in higher ash content and fouling in the boiler. The study also highlights the importance of proper waste management strategies to prevent fouling and improve operational efficiency. Whereas, Gupta et al. (2019) investigated the operational challenges faced by CFBC boilers when using high-ash fuels and proposed solutions to prevent slag buildup. Air blasters have been proposed as a solution for preventing the choking of the inlet pipe in CFBC boilers. A study by Pabon et al. (2019) investigated the use of air blasters for waste management in CFBC boilers and found that it effectively prevented slag buildup and improved operational efficiency. The study suggests that air blasters can be a cost-effective solution for managing waste in CFBC boilers, particularly when using low-quality fuels. In addition, the utilization of advanced technologies such as fluidized bed combustion with hot gas filtration and gasification can also improve the operational efficiency of CFBC boilers when using low-quality fuels (Gupta et al., 2019). These technologies will be helpful in reducing the formation of ash and fouling in the boilers, which may be lead to improved efficiency and reliability. Overall, the literature highlights the challenges posed by low-quality fuels on the operational efficiency and reliability of CFBC boilers and the importance of waste management strategies to prevent fouling and improve efficiency. The proposed solution of using air blasters can be an effective and cost-efficient way to manage waste in CFBC boilers, particularly when using low-quality fuels. The utilization of advanced technologies can also aid in improving the efficiency and reliability of CFBC boilers when using low- quality fuels.