Method and system for recycling waste heat of slag flushing water vapor of blast furnace

A technology of waste heat recovery and blast furnace slag flushing, which is applied to machines using waste heat, machine operation mode, process efficiency improvement, etc., can solve problems such as low thermal efficiency, improve heat energy utilization rate, reduce water cost, and reduce steam treatment cost effect

Inactive Publication Date: 2017-12-12
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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  • Claims
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Problems solved by technology

[0004] The existing patent for waste heat recovery system of slag flushing steam is "a waste heat recovery system for blast furnace slag water quenching waste steam", the patent number is 201210007390.6. Need to lay additional pipes, there are problems such as low thermal efficiency

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  • Method and system for recycling waste heat of slag flushing water vapor of blast furnace

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0026] Such as figure ...

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Abstract

The invention relates to a method and system for recycling waste heat of slag flushing water vapor of a blast furnace, and relates to the technical field of treatment of slag flushing water of blast furnaces. According to the method for recycling the waste heat of slag flushing water vapor of the blast furnace, a lithium bromide refrigeration water unit is used for generating refrigeration water while vapor is condensed, condensate water and the refrigeration water can be cyclically supplied to a water-quenched slag furnace so as to be reused, and thus water is saved. According to the system for recycling the waste heat of slag flushing water vapor of the blast furnace, a vapor reheating device, a vapor heat storage device, the lithium bromide refrigeration water unit and a cooling water recycling device are made to be in butt joint in sequence so as to form the continuous system, vapor generated in the slag flushing process of the water-quenched slag furnace can be collected, heat exchange is completed through the lithium bromide refrigeration water unit, and the generated condensate water and the generated refrigeration water can be recycled, so that water is saved, the cost is reduced, and the treatment process is simplified.

Description

technical field [0001] The invention relates to the technical field of blast furnace slag flushing water treatment, in particular to a method and system for recovering and utilizing waste heat of blast furnace slag flushing steam. Background technique [0002] During the ironmaking process of the iron and steel plant, the temperature of the slag produced is about 1500°C. The high-speed water flow provided by the slag flushing pump will generate a large amount of water vapor in the instant contact with the high-temperature slag. At present, in the slag production process, steam is generally It is directly discharged, and the slag flushing water vapor has very rich waste heat resources. The direct discharge not only loses precious water resources, but also wastes a lot of heat, and produces a lot of white mist. Because the water vapor contains a lot of H 2 S, S0 2 , HCl and other acidic substances, causing pollution to the environment. [0003] The traditional method uses wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/08F25B27/02
CPCF25B27/02C21B3/08Y02A30/274Y02P10/20
Inventor 王晓晖吴保华侯钢铁朱文玲徐晓孙泽辉黄小波
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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