Time-sharing preheating system for combustion-supporting air of hot-blast stove

A combustion-supporting air and hot blast stove technology, which is applied in the field of hot blast stoves in the metallurgical industry, can solve the problems of low cost input, large energy consumption, and high operating costs, and achieve the effects of strong applicability, efficient recovery, and simple control

CN106967861AActive Publication Date: 2017-07-21MCC CAPITAL ENGINEERING & RESEARCH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-07-21

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Abstract

The invention discloses a time-sharing preheating system for combustion-supporting air of a hot-blast stove. The time-sharing preheating system comprises the hot-blast stove and a combustion-supporting fan, wherein an in-stove preheating device for the combustion-supporting air is arranged on the lower part of the inner cavity of the hot-blast stove; and an in-stove heat exchange channel for the combustion-supporting air and an in-stove waste smoke channel are arranged in the in-stove preheating device for the combustion-supporting air. The outlet of the combustion-supporting fan is capable of communicating with a combustion-supporting air inlet through a heat exchanger for the combustion-supporting air; a combustion-supporting air channel and a first waste smoke channel are arranged in the heat exchanger for the combustion-supporting air; the outlet of the combustion-supporting air channel is capable of communicating with the combustion-supporting air inlet through a first combustion-supporting air passage or a second combustion-supporting air passage; and the in-stove heat exchange channel for the combustion-supporting air is serially communicated onto the second combustion-supporting air passage. The preheating system is capable of meeting the need of accumulating lots of heat by the hot-blast stove in the initial period of stove burning and the need of rising the crown temperature of the hot-blast stove in the middle and later periods of the stove burning, simple in structure and low in cost investment.
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Description

technical field

[0001] The invention relates to the technical field of hot blast stoves in the metallurgical industry, in particular to a time-sharing preheating system for combustion-supporting air of hot blast stoves suitable for ironmaking processes. Background technique

[0002] With the large-scale development of blast furnaces and the increasing cost pressure of the steel industry, it is particularly important to strengthen smelting in blast furnaces and reduce the coke ratio. In addition to reducing the coke ratio from the aspects of production operation level and raw fuel quality, increasing the air supply temperature of the hot blast stove is also an extremely important and effective means.

[0003] In order to achieve a hot air temperature above 1250°C, a few iron and steel enterprises use high calorific value gas (coke oven gas, converter gas, etc.) It is still the first choice for various steel companies.

[0004] In order to achieve high blast temperature unde...

Examples

Embodiment Construction

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0049] Such as figure 1 As shown, the present invention provides a time-sharing preheating system 100 for hot blast stove combustion-supporting air, including a hot blast stove 1 and a combustion-supporting fan 2. In this embodiment, the hot blast stove 1 can be top-combustion, external combustion, internal combustion or Spherical hot blast stoves and other different forms, the number of hot blast stoves is multiple, and the plurality of hot blast stoves are arranged in parallel; the top of the hot blast stove 1 is provided with a gas inlet 101 and a combustion air inlet 102, and the bottom of the hot blast stove 1 is arranged There is a waste gas outlet 103, and the waste gas outlet 103 communicates with the bottom of the chimne...