Furnace drying system of hot-blast furnace, furnace drying system of blast furnace and furnace drying method

Abstract

The invention discloses a furnace drying system of a hot-blast furnace, a furnace drying system of a blast furnace and a furnace drying method. The furnace drying system of the hot-blast furnace comprises a hot blast furnace provided with a cold air inlet, a hot air outlet, a smoke outlet and a vault manhole, a combustion cut-off valve which is used for being connected with the vault manhole of the hot blast furnace and is provided with a water cooling structure, a furnace drying combustor connected with the combustion cut-off valve, a gas supply mechanism which is connected with the furnace drying combustor and is used for supplying gas to the furnace drying combustor, a combustion-supporting gas supply mechanism which is connected with the furnace drying combustor and is used for supplying combustion-supporting gas to the furnace drying combustor, and a cooling water supply mechanism which is connected with a water cooling structure of the combustion cut-off valve and is used for supplying cooling water to the combustion cut-off valve. According to the furnace drying system of the hot-blast furnace, the furnace drying system of the blast furnace and the furnace drying method disclosed by the invention, under a situation of not using a main combustor of the hot blast furnace, the blast furnace is subjected to furnace drying, and the problem of the furnace drying on the blast furnace under a situation of no blast furnace gas of a newly-built blast furnace is solved.

Description

technical field [0001] The invention relates to a blast furnace oven equipment, in particular to a hot blast furnace oven system, a blast furnace oven system and an oven method. It belongs to the field of metallurgy. Background technique [0002] Blast furnace baking is usually completed by means of hot blast furnace firing and air supply, and the hot blast stove firing is completed by burning blast furnace gas through the main burner on the top; Blast furnace gas is a by-product combustible gas in the process of blast furnace ironmaking. It is the main fuel for the main burner of blast furnace hot blast stove. Most of the main burners of hot blast stove can only burn blast furnace gas. But in some cases, there is no blast furnace gas for the main burner of the hot blast stove to work. For example, as the country intensifies efforts to relocate industrial enterprises from cities, more and more iron and steel enterprises have relocated their blast furnaces through capacity ...

AI Technical Summary

Problems solved by technology

Before the relocation and new blast furnace is put into operation, the blast furnace and its associated hot blast stove need to be heated and baked. Before the first blast furnace is put into operation, the main burner of the hot blast stove cannot complete the firing and supply air to the blast furnace because there is no blast furnace gas on site. blast furnace

Or there is no blast furnace gas produced due to maintenance, shutdown and other reasons

[0003] In order to solve the above problems, an oven burner can be installed directly on the blast furnace body, but the distribution of the flue gas burned in this way is poor in the furnace, the flue gas flow rate is small, and the furnace pressure is low during the oven, which is harmful to the blast furnace. The baking of the brickwork at the bottom of the hearth cannot meet the temperature requirements, especially if it exceeds 2000m 3 The volume of the blast furnace is basically unable to meet the process requirements of the furnace curve

Images