Oxygen top-blown converter flue gas purification and waste heat recovery system device

Abstract

An oxygen top-blown converter flue gas purification and waste heat recovery system device belongs to a boiler energy saving and purifying technology. The flue gas recovery and purification system has advantages of simple flow, less equipment investment, low flue dust resistance and low blower fan energy consumption. By the adoption of an exhaust-heat boiler, flue gas temperature can be reduced from around 1400 DEG C to 200 DEG C, a lot of damp-heat can be recovered; a large amount of saturated vapor is generated, and the saturated vapor is sent to a steam turbine for power generation after voltage stabilization by a heat accumulator, thus greatly minimizing electric furnace energy consumption. By waste heat energy of the exhaust-heat boiler and flue dust purification, ash in ash exhausting system is dry and returns to the converter for steel-making after passing through hot briquetted iron, thus raising the converter output by 1-2%. Water resource is essentially not consumed in the whole system, steam generated passes through the heat accumulator for voltage stabilization and is then sent to the steam turbine for power generation, and after power generation, condensate water is processed and returns to a boiler room for recycle and reuse. By the use of a purifying deduster, coal gas and exhaust flue gas and dust are less than 10mg / Nm<3>, thus achieving the purpose of energy saving and emission reduction and benefiting the nation and the people.

Description

technical field [0001] The invention relates to a boiler energy-saving purification technology, in particular to an oxygen top-blown converter flue gas purification and waste heat recovery system device. Background technique [0002] Since my country's reform and opening up, the national economy has grown rapidly, and "scientific and technological innovation, independent innovation" has become the mainstream of my country's current industrial development. my country's modern industry is gradually developing in the direction of conservation, energy saving, emission reduction, and low carbon. Especially in enterprises that use boilers such as medium and large power plants, thermal power plants, steel plants, and cement plants, oxygen top-blown converters are widely used. However, during the blowing process of the oxygen top-blown converter, a large amount of reddish-brown thick smoke is emitted, which is often called flue gas. The flue gas has a high temperature and generate...

AI Technical Summary

Problems solved by technology

At present: the commonly used and recommended flue gas recovery processes in domestic unburned methods all have certain deficiencies, such as: the waste heat recovery rate of flue gas is not high, resulting in a large amount of heat loss; the entire treatment system consumes a lot of equipment and manpower, and some equipment still requires Imported from abroad, the operating cost is high, and the humidification treatment of the equipment will also waste a lot of water resources, and a large amount of wet dust cannot be effectively used

After continuous exploration, research and testing, the R&D personnel and technicians in the same industry hope to find a flue gas purification system with high dust removal efficiency, energy saving and environmental protection. Technical Difficulties Overcome

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