Heat preservation device and method for a hot blast stove

Abstract

The invention discloses a hot-blast stove insulating device and method, and belongs to the technical field of blast furnace ironmaking. The hot-blast stove insulating device comprises a cold air pipeline, a hot air pipeline, a backflow damping-down pipeline, a first temperature detector, a second temperature detector and a controller; the cold air pipeline is provided with a manhole and an adjusting valve, and the output end of the cold air pipeline communicates with the bottom of a hot-blast stove; the input end of the hot air pipeline communicates with the top of the hot-blast stove, and a blocking plate is detachably arranged at the communicating joint of the hot air pipeline and a blast furnace; the input end of the backflow damping-down pipeline communicates with the hot air pipeline,and the input end of the backflow damping-down pipeline is arranged between a first stop valve and the blocking plate; the first temperature detector is arranged in a flue of the hot-blast stove andconnected with the controller; and the second temperature detector is arranged in the hot air pipeline and connected with the controller. According to the hot-blast stove insulating device and method,operation is easy, the equipment maintenance quantity is low, safe, efficient and energy-saving hot-blast stove long-term insulating operation is achieved, and high-temperature air can be quickly andefficiently provided for the blast furnace when production is recovered.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking, in particular to a heat preservation device and method for a hot blast stove. Background technique [0002] During the normal production of the ironmaking blast furnace, the blast blast required by the blast furnace is provided by a high-power blast furnace fan. The cold air is heated up after passing through the heat storage grid bricks of the hot blast furnace, and then passes through the hot blast main pipe, hot blast ring pipe, gooseneck pipe, blowpipe, Then into the blast furnace. [0003] When the blast furnace needs to be shut down for a long time due to major and medium repairs, simmering furnace, etc., in order to ensure the service life of the refractories in the hot blast furnace and the flue furnace grate, and to provide hot air for the blast furnace in a timely and rapid manner when production resumes, it is necessary to control the hot air. The furnace is kept warm...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a heat preservation device and method for a hot blast stove, which solves or partially solves the problem that the cold air required for the heat preservation operation in the prior art is ensured by allocating other blast furnaces or adding a temporary pipe to the cold air pipe by a combustion-supporting fan, resulting in construction And equipment maintenance is heavy, resource consumption is large, and the technical problem of not being able to provide high blast temperature for the blast furnace in a timely manner after the blast furnace production resumes

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