Particle emission control during the coal combustion process of lime shaft kiln
Lime shaft kiln produces a large amount of particulate matter during coal combustion, causing serious pollution to the atmospheric environment. With the increasingly strict environmental requirements, controlling particulate matter emissions during the coal combustion process of lime kilns has become an inevitable trend in the industry's development.
1、 Sources and hazards of particulate matter emissions
The particulate matter generated during the coal combustion process of lime shaft kiln mainly comes from the following aspects:
Fuel combustion: Incomplete combustion of coal powder will produce particulate matter such as carbon black.
Raw material decomposition: Lime dust is generated during the limestone decomposition process.
Airflow carrying: High speed airflow inside the kiln will carry some small particles out of the kiln.
These particles have small particle sizes and large specific surface areas, making them prone to adsorbing harmful substances and causing serious harm to human health and the atmospheric environment.
2、 Particle emission control technology
To effectively control the particulate matter emissions during the coal combustion process of lime kiln, the following technical measures can be taken:
Optimize combustion process:
Using high-quality coal with low sulfur and ash content to reduce the generation of particulate matter during combustion.
Improve burner structure, optimize air distribution, enhance combustion efficiency, and reduce the generation of particulate matter such as carbon black.
Adopting staged combustion technology, controlling combustion temperature, suppressing the generation of nitrogen oxides, and indirectly reducing particulate matter emissions.
Strengthen dust removal inside the kiln:
Install cyclone dust collectors or gravity settling chambers at the kiln tail to remove large particle dust.
Adopting efficient bag filter or electrostatic precipitator to remove fine particles and ensure that the particle emission concentration meets the standard.
Implement closed production:
Seal the processes of limestone crushing, screening, and transportation to prevent dust from escaping.
Strengthen the sealing of the kiln body, reduce air leakage, and lower particulate matter emissions.
Promote clean production technology:
Using clean energy sources such as natural gas to replace coal and reduce the generation of particulate matter from the source.
Promote the use of new energy-saving and environmentally friendly lime kilns, improve energy utilization efficiency, and reduce pollutant emissions.
3、 Strengthen environmental management
Establish a sound environmental management system, strengthen the operation and maintenance of environmental protection facilities, and ensure their normal operation.
Regularly monitor particulate matter emissions, timely grasp the emission situation, and take effective measures to control pollution.
Strengthen environmental protection publicity and education, enhance corporate environmental awareness, and consciously fulfill environmental responsibilities.
Controlling particulate matter emissions during the coal combustion process of lime kilns is an important measure to improve environmental air quality. By adopting advanced pollution control technologies and strengthening environmental management, particulate matter emissions can be effectively reduced, promoting the green and low-carbon development of the lime industry and contributing to the construction of a beautiful China.
