1. Smoke and dust of alumina aluminum roasting kiln:
Alumina production kilns (clinker kilns, roasting kilns, cement kilns) have high dust concentration, and the mature treatment process is cyclone dust collector and electric precipitator, and the dust materials under the ** can be directly returned to the process.
Utilization in the process. With the adoption of new processes of suspension preheating, decomposition outside the kiln and boiling roasting, the utilization rate of the production furnace has been improved, the exhaust gas temperature has been reduced, the working conditions of the electrostatic precipitator have been greatly improved, the dust removal efficiency can be as high as 99%, and the dust concentration has been reduced to 10mg m, which meets the requirements of emission standards.
2. Alumina roasting kiln smoke and dust treatment process
Ventilation dust removal system, due to the extensive use of bag dust collectors, the dust removal efficiency reaches 90%, which can meet the emission standard. Due to the high temperature and strong abrasiveness of clinker dust, it is difficult to capture. Taking advantage of the strong hydrophilicity of clinker powder, it is equipped with a large-diameter water bath dust collector to wash and remove dust with red mud, and the effect is better. After washing, the mud can be returned to the production process for use, and it is also convenient to clean the scars in the water bath regularly. The application effect of the technology of using wet electrostatic precipitators to capture plastic dust is particularly obvious.
In the wet electrostatic precipitator, by releasing the high-voltage electrostatic electromagnetic field, the smoke and dust are negatively charged, so that it is adsorbed on the anode plate, and then washed to the bottom through the sprinkler system, and the removal rate of the standard SO is more than 95%, the removal rate of fine dust is more than 95%, and the PM25 is 985% removal rate, droplet removal rate is greater than 95%, mercury and other heavy metal removal rate is 70%-90%, and the dust concentration at the outlet of the chimney meets 10mg nm.
3. Advantages of alumina fume treatment equipment:
1. High dust removal efficiency: The dust removal efficiency of a reasonably designed electrostatic precipitator can reach more than 99%.
2. Small resistance loss: Generally, the resistance of the electrostatic precipitator is less than 294pa, and some resistance requirements are higher.
3. Able to deal with high-temperature flue gas: The general electrostatic precipitator is used to treat flue gas below 250, and can handle flue gas above 350 or even 500 after special design.
4. It can trap corrosive substances: The electrostatic precipitator with special structure can trap corrosive substances.
5. Low operating cost: due to the small number of moving parts, low power consumption, and small maintenance workload under normal conditions, the corresponding daily operating cost is low.
6. Classification and capture of dust with different particle sizes.
4. Prospect of alumina roasting kiln smoke and dust treatment technology.
With the increasingly stringent environmental protection requirements, the alumina roasting kiln smoke treatment technology is also developing and innovating. In the future, the alumina roasting kiln smoke treatment technology will pay more attention to environmental protection, efficiency and sustainability.
First of all, the research and development of new technologies will continue to intensify. In order to better meet the requirements of environmental protection, it is necessary to develop more efficient, low-energy consumption and low-cost alumina roasting kiln smoke and dust treatment technology. For example, research on more reasonable bag filter structure, materials and processes to improve dust collection efficiency and prolong service life;Develop a more intelligent electrostatic precipitator control system to achieve automation and intelligent control, and improve the treatment effect and stability.
Secondly, the utilization of resources will be more widely promoted. The smoke and dust of alumina roasting kiln are rich in valuable components, such as aluminum, silicon, iron, etc., which can be effectively used through resource utilization technology to realize the reduction, recycling, and harmlessness of waste. For example, the technology of using roasting kiln smoke and dust to prepare new building materials, catalyst carriers, adsorbents, etc., and expand their applications in environmental protection, energy, chemical industry and other fields.
Finally, intelligent monitoring and management will become more popular. Through the application of the Internet of Things, big data, artificial intelligence and other technologies, real-time monitoring, data analysis and optimal management of the whole process of smoke and dust treatment in alumina roasting kiln are realized. Through intelligent monitoring and management, it can improve the treatment effect, reduce energy consumption and reduce emissions, and bring both economic and social benefits to the enterprise.
In short, with the continuous improvement of environmental awareness and technological innovation, the alumina roasting kiln smoke and dust treatment technology will usher in a broader development prospect. In the future, more efficient, environmentally friendly and sustainable treatment technologies will be applied to actual production and make greater contributions to the construction of a beautiful China.