High-temperature grate type organic solid waste incinerator is a commonly used equipment for treating organic solid waste, and its core part is the selection of refractory materials. The choice of refractory material has a crucial impact on the performance and service life of the incinerator. This article will conduct an in-depth review of the selection of refractories for high-temperature grate organic solid waste incinerators, aiming to provide useful references for relevant practitioners. List of high-quality authors
First, the importance of refractories.
During the operation of high-temperature grate organic solid waste incinerators, they need to withstand extremely high temperatures and complex chemical environments, so the requirements for refractories are extremely high. The choice of refractory materials is directly related to the stability, reliability and service life of the incinerator. If the refractory material is not selected properly, it may lead to unstable operation of the incinerator, frequent failures, and even safety accidents.
Second, the types and characteristics of refractory materials.
1.High alumina refractory material.
High alumina refractory material has high refractory degree and good wear resistance and impact resistance, and is one of the commonly used refractories in high-temperature grate type organic solid waste incinerator. Its disadvantage is that it is less alkaline resistant and is not suitable for use in alkaline environments.
2.mullite refractory.
Mullite refractory has excellent thermal shock resistance and high temperature strength, can withstand the temperature change of quench and heat, and is suitable for the treatment of organic solid waste with high calorific value and easy coking. However, mullite refractories have poor acid resistance and are not suitable for use in acidic environments.
3.Corundum refractory.
Corundum refractories have extremely high refractory and high-temperature strength, and are able to withstand high temperatures and high-strength chemical attack. The disadvantage is that it is expensive and not suitable for the treatment of organic solid waste that contains a lot of acidic substances.
Third, the selection principle of refractory materials.
1.Stability principle.
Refractories should maintain the stability of their chemical and physical properties at high temperatures, and are not prone to decomposition, oxidation or melting. At the same time, the refractory should have excellent thermal shock stability to cope with the environment of rapid temperature changes.
2.The principle of adaptability.
The refractory material should be adapted to the chemical environment inside the incinerator. For acidic environments, refractories with strong acid resistance should be selected; For alkaline environments, refractory materials with strong alkali resistance should be selected. In addition, refractories should be adapted to high temperature and high strength operating conditions.
3.Principle of economy.
On the premise of meeting the requirements of stability and adaptability, the choice of refractory materials should also consider its economy. Choosing the most reasonable, easy-to-process and easy-to-maintain refractory materials can help reduce equipment costs and maintenance expenses.
Fourth, practical application and case analysis.
A municipal waste incineration power plant adopts a high-temperature grate organic solid waste incinerator, and the selection of refractory materials is fully considered. In view of the high temperature and acid gas generated in the waste incineration process, high-alumina refractory material was selected as the main refractory material, supplemented by mullite refractory material to improve thermal shock resistance. At the same time, in order to further enhance the stability and service life of the incinerator, a new nano-ceramic coating technology was used to treat the surface of the refractory material, which improved the oxidation resistance and wear resistance of the refractory. The scheme shows good stability and reliability in actual operation, which provides a strong guarantee for the long-life operation of the incinerator.
V. Conclusions and Recommendations.
The selection of refractory materials for high-temperature grate type organic solid waste incinerator has a decisive impact on the performance and service life of the incinerator. When choosing refractory materials, multiple factors such as stability, adaptability and economy should be comprehensively considered, and a reasonable choice should be made according to the actual application. In order to further improve the performance and service life of the incinerator, it is recommended to strengthen the research and development and application of new refractory materials, and continuously promote the progress and development of high-temperature grate organic solid waste incineration technology.