Pulverized coal oxy-fuel combustion device for smelting furnace

Abstract

The invention discloses a pulverized coal oxy-fuel combustion device for smelting furnace. The pulverized coal oxy-fuel combustion device comprises a combustor which is mounted on the furnace, one side of the combustor is fixed to a combustor fixing plate, the combustor is externally provided with combustor protection bricks, the combustor is internally provided with a pulverized coal passage and an oxygen passage, and a pulverized coal nozzle and an oxygen nozzle are mounted in the pulverized coal passage and the oxygen passage respectively. The pulverized coal oxy-fuel combustion device is simple in structural principle and high in automation degree, a pulverized coal oxy-fuel combustion technique is provided, improvement of pulverized coal combustion efficiency and reduction of combustion pollutant discharge are realized while combustion flame is stable and uniform in dispersion, high-temperature hot spots in the furnace are avoided, and uniformity in temperature distribution is achieved.

Description

technical field [0001] The invention relates to the technical field of smelting furnaces, in particular to a pulverized coal full-oxygen combustion device on a smelting furnace. Background technique [0002] At present, coal, as the main energy source in my country, has always accounted for more than 70% of primary production and consumption, and in the foreseeable future, the position of coal in my country's energy structure will remain stable and firm. In the actual production and application of coal, there are a lot of problems such as low use efficiency and high pollutant discharge. In the production of metallurgical industry, coal combustion is one of the important energy consumption, and its safe, efficient and clean utilization is particularly important. [0003] After years of development, pulverized coal combustion technology has achieved a certain degree of development in improving combustion efficiency and reducing pollutant emissions. However, in the application ...

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Problems solved by technology

In the actual production and application of coal, there are a lot of problems such as low use efficiency and high pollutant discharge. In the production of metallurgical industry, coal combustion is one of the important energy consumption, and safe, efficient and clean utilization is particularly important.

[0003] After years of development, pulverized coal combustion technology has achieved a certain degree of development in improving combustion efficiency and reducing pollutant emissions. However, in the application of conventional pulverized coal combustion technology in metallurgical furnaces, the combustion efficiency of pulverized coal is low and the combustion is unstable. , high emission of combustion pollutants, etc., which greatly affect and restrict the efficiency and cost of metallurgical production

[0004] Oxygen-enriched combustion technology is a relatively advanced means to improve combustion efficiency. A certain amount of pure oxygen is injected into the combustion air to achieve the effect of oxygen-enriched combustion air (usually between 22.5% and 50%). Under the condition of constant load, the amount of combustion flue gas will be significantly reduced, but the combustion speed of pulverized coal in an oxygen-enriched atmosphere is several times faster than that in air, making the combustion flame small and dense, and the flame temperature exceeds 2000°C, so high The temperature seriously affects the life of the kiln, and due to the local release of combustion energy, the temperature distribution gradient in the kiln is large, which is not conducive to optimizing production efficiency

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