Blast furnace hot blast stove system

Abstract

The invention discloses a blast furnace hot blast stove system. The blast furnace hot blast stove system comprises a plurality of hot blast stoves and is characterized in that the multiple hot blast stoves are connected to a blast furnace in parallel; coal gas is preheated by a coal gas preheating device and then conveyed to each hot blast stove by a corresponding distribution pipeline; combustion air is preheated by an air preheating device and then conveyed to each hot blast stove by a corresponding distribution pipeline; and the coal gas passes through a dust removal device and then is conveyed to the coal gas preheating device. The blast furnace hot blast stove system preheats the coal gas and smoke, the initial temperature of the combustion air is effectively improved, the air temperature level is greatly improved, the stability of temperature of the blast furnace is ensured, the air temperature of the hot blast stoves is increased so as to reduce the coke ratio advantageously, the iron and steel output is improved, energy is saved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a blast furnace hot blast stove system. Background technique [0002] Blast furnace hot blast stove is one of the main supporting equipment for blast furnace in ironworks, and it is a kind of heat exchange equipment. It is mainly used to provide high-temperature hot air for the blast furnace for the reaction in the furnace. The role of the hot blast stove is to continuously provide high-temperature hot air above 1000° for the blast furnace. The energy consumed is the heat generated by the combustion of gas, which accounts for half of the gas produced by the blast furnace. Generally, a blast furnace is equipped with 3 to 4 hot blasts. Air temperature plays an extremely important role in blast furnace smelting. Firstly, 20%-30% of the heat consumed by blast furnace smelting is the heat brought by the hot air; secondly, under the condition that the heat income per ...

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Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a blast furnace hot blast stove system to solve the problem that the traditional blast furnace hot blast stove air temperature in the current technology is low, resulting in large fluctuations in blast furnace temperature and affecting normal operation. smelting production problems

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