Design of Smoke Purification for Metallurgical Furnace and Kiln
The source of smoke pollution from metal manufacturing and production lies mainly in the various processes of metal smelting furnaces and kilns, such as electric arc furnaces and aluminum smelting and other production processes. During these processes, materials are continuously melted and crystallized, resulting in large smoke emissions, giving rise to environmental pollution.
For this reason, metallurgical furnace and kiln smoke purification and control have been developed in many countries, and smoke purification treatment and environmental protection have become a prerequisite for metallurgical production. In metallurgical production, smoke dust generated in furnace and kiln should be removed by comprehensive dust removal measures such as smoke exhaust, dust collection and purification treatment, so as to ensure that the emission concentration does not exceed the national emission standards.
The smoke purification design for steel billets, beams, and various metal materials smelting processes is mainly based on the selection of purification equipment to reduce the concentration of harmful substances and dust in the smoke. The rational selection of purification equipment and the reasonable design of purification process can improve the purification efficiency and reduce the energy consumption of the equipment in the purification process.
In general, the process designed for metal smelting furnace and kiln smoke purification mainly include smoke exhauster, flue exhaust smoke pre-treatment, secondary dust collection and purification, and other specialized process equipment. The first working procedure is the smoke exhaust, which is to echo the smoke generated in the production and processing atmosphere of the metal in time, and to reduce environmental pollution and human activity.
The second process is the flue gas purification pre-treatment system. The import and export filters, bag filters and checkered solids removal devices compose this part. The main advantages of purification pre-treatment system is to capture coarse particles and reduce the dust concentration of exhaust smoke.
The third process is the bag dust collector and purification system, which is mainly composed of bag filter, screw conveyor and cyclone dust collector. Bag filter is a dust collection device that uses the principle of dust filtration. It is mainly used for dust filtration and air filtration, and can also capture dusts of all particle sizes.
The fourth process is to improve the dust removal efficiency of the dust filter. The adsorption tower with the help of active carbon removes the harmful substances and dust in the smoke. And the electrostatic precipitator carries out more effective dust removal after treatment, so that the dust removal efficiency can up to more than 98%.
The fifth process is the central exhaust dust removal treatment. This process mainly includes general dust collector, wet dust collection and dry dust collection. This process is mainly to remove the last part of the dust left in the smoke and other fine particles. It can reduce the amount of dust emissions.
The last process is the purification of dust particles and other harmful substances that can not be simply removed by dust removal methods. This mainly includes flue chimney, high frequency pressure pulse desulfurization and denitration equipment, microbial control device, duct ultraviolet sterilization and ionization equipment, etc.
The process of metallurgical furnace and kiln smoke purification design mainly includes smoke exhauster, flue gas purification pre-treatment, secondary dust collection and purification, dust collection and purification system, and dust particle purification. Through the reasonable design of the process, the efficiency of flue gas purification can reach the purification requirements of national emission standards, and ensure that the pollutant emission concentration will not exceed the standard limit.
