Application examples of refractory castables in the power industry
In the power industry, especially in thermal power plants, boilers are key thermal equipment, and their operating efficiency and safety are directly related to the power generation capacity and economic benefits of the entire power plant. As an important high-temperature protection material, refractory castable plays an irreplaceable role in boilers and related equipment. The following will take the successful case of power plants as an example to elaborate on the application of refractory castables in the power industry and its remarkable results.
Background of the case
The case occurred during the 2×300MW reconstruction and expansion project of the Heshan Power Plant in Guangxi. The centerpiece of the project consists of a reinforced concrete monocythic chimney with a height of 240 meters and a diameter of 7.0 meters. Since the inside of the chimney is subjected to the erosion of high-temperature flue gases for a long time, the choice of lining material is crucial. Traditional lining materials are often difficult to withstand the dual effects of high temperature and corrosive gases, and are prone to problems such as peeling and cracking, which seriously affect the service life of the chimney and the safe operation of the power plant.
solution
In order to solve the above problems, a power plant in Guangxi decided to use BSJ-Y1 acid-resistant lightweight refractory castable as the lining material of the chimney. This castable has excellent high temperature resistance, corrosion resistance and good construction performance, which can effectively resist the erosion of high temperature flue gas and protect the safety and stability of the chimney structure.
Construction process
During the construction process, the engineering team operates in strict accordance with the construction drawings and technical specifications. First of all, the inner wall of the chimney is cleaned and sanded to ensure that the surface is smooth and free of impurities. Then, according to a certain proportion, BSJ-Y1 acid-resistant light refractory castable is mixed and stirred with water to form a uniform slurry. Next, the slurry is evenly sprayed or poured on the inner wall of the chimney using professional construction equipment, and the necessary vibration and smoothing are carried out to ensure the compactness and flatness of the inner lining. Finally, after the castable is naturally dried and solidified, the necessary maintenance and inspection are carried out to ensure that the quality of the inner lining meets the design requirements.
Apply effects
Since the chimney was put into service, BSJ-Y1 acid-resistant lightweight refractory castables have shown excellent performance. First of all, its excellent high-temperature resistance effectively resists the erosion of high-temperature flue gas, and ensures the stability and safety of the chimney structure. Secondly, its corrosion resistance significantly reduces the corrosive effect of flue gas on the inner wall of the chimney and prolongs the service life of the chimney. In addition, the castable also has good construction performance and low cost advantages, which saves a lot of construction costs and maintenance expenses for the power plant.
Economic and social benefits
This successful case not only fills the gap in the use of monolithic castable material technology for single-barrel chimneys in China, but also creates the single-cylinder chimney with the lowest cost in China. Its successful application not only brings significant economic and social benefits to Guangxi Heshan Power Plant, but also provides useful reference for the development of chimney lining construction technology, the selection of lining casting materials, and the reduction of project cost in China's thermal power industry.
To sum up, the application of refractory castables in the power industry has a wide range of prospects and important value. With the continuous progress of science and technology and the development of industrial production, it is believed that refractory castables will play a greater role in more fields and provide strong support for modern industrial production.
Next page: