Fine coal dense phase conveying system of fusion reducing furnace

Abstract

The invention relates to a dense phase fine coal conveying system for smelting / reducing furnace, comprising a fine coal bunker; fluidized injection tanks arranged under the outlet of the fine coal bunker; and dense phase fine coal distributors arranged in front of the furnace. The devices are communicated through fine coal pipelines, and a fine coal flow monitor, a nitrogen pressure flow meter and a flow controller thereof are arranged on the pipelines. The key design includes that each independent system comprises at least two fluidized injection tanks that are parallelly arranged, at least one suction pipe is led out from each independent injection tank and connected with the matched main coal conveying pipes, and at least two independent main coal conveying pipes are respectively connected with the matched dense phase fine coal distributors for feeding fine coal from corresponding injection orifices on the smelting / reducing furnace with distributing branch pipes and the manager circuits of the distributors.

Description

technical field [0001] The invention relates to a gas phase transmission technology for powder and granular materials, which is especially suitable for the dense phase transmission system of modern large-scale industrial furnaces such as smelting reduction furnace pulverized coal Background technique [0002] The pulverized coal dense phase conveying system is a high-efficiency, low-energy energy support system matched with modern, large-scale industrial furnaces. It involves the fluidized treatment technology of powder and granular materials and the high-efficiency, continuous conveying and accurate distribution technology of gas phase materials. The larger the particle size, or the higher the concentration, the more difficult it is to design the system. The main application industries are metallurgy and thermoelectricity, especially the metallurgical industry. [0003] Corex smelting reduction furnace ironmaking process is a new modern ironmaking process. Non-coking coa...

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Problems solved by technology

[0010]The original 2# blast furnace coal injection process of Shijiazhuang Iron and Steel Plant in Hebei Province introduced the German KOSTE pulverized coal dense phase conveying technology, which has realized the dense phase conveying of pulverized coal. This is Undoubtedly, however, this technology is multi-branch dense-phase transportation, which requires high investment, large maintenance, and high maintenance costs. It cannot meet the needs of the current Corex smelting reduction furnace and the basic energy-saving and environmental protection requirements.

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