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Method and system suitable for recovering waste heat of blast furnace slag flushing water

A blast furnace slag flushing water and waste heat recovery technology, applied in recycling technology, furnace, waste heat treatment, etc., can solve the problems of fouling on the surface of the heat absorber, poor heat transfer effect, slow surface water flow, etc., to improve slag flushing Water waste heat recovery rate, high thermal efficiency effect

Inactive Publication Date: 2013-04-24
WISDRI ENG & RES INC LTD
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Problems solved by technology

The heat absorbing gas in the hot water pool adopts the immersion type, not only the surface water flow speed is slow, the heat transfer effect is poor, but also the surface of the heat absorber has problems of scaling and corrosion
In addition, this system is only suitable for use in winter, and this system does not solve the seasonal problem of waste heat recovery from flushing water

Method used

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  • Method and system suitable for recovering waste heat of blast furnace slag flushing water

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Embodiment Construction

[0032] 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 in detail with reference to the accompanying drawings.

[0033] A method of the present invention applicable to waste heat recovery of blast furnace slag flushing water comprises the following steps:

[0034] S1, filter the high-temperature blast furnace slag washing water and store it in the hot water pool;

[0035] S2, pressurized delivery of hot water, hot water can be delivered through a circulating pump;

[0036] S3, sending hot water into absorption refrigeration unit or heating device or cooling tower;

[0037] When the hot water is sent to the absorption refrigeration unit, the absorption refrigeration unit is driven by the hot water to perform refrigeration;

[0038] When the hot water is sent to the heating device, the hot water exchanges heat with the room and re...

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Abstract

The invention relates to a method and a system suitable for recovering waste heat of blast furnace slag flushing water. The method comprises the following steps of: S1, filtering the high-temperature blast furnace slag flushing water and then storing in a hot water tank; S2, performing pressure delivery on the hot water; S3, delivering the hot water to an absorption refrigerating unit or a heating device or a cooling tower; and S4, delivering the water flowing out of the absorption refrigerating unit or the heating device or the cooling tower to a blast furnace slag treatment system to flush slag. The system comprises the blast furnace slag treatment system, the hot water tank and a circulating pump which are connected sequentially, and the cooling tower, the absorption refrigerating unit and the heating device which are connected in parallel. By adopting the method and the system, the low-temperature waste heat in the blast furnace slag flushing water can be fully utilized, so that the aims of energy conservation and environmental friendliness are fulfilled, the seasonal problem of the slag flushing water waste heat recovery is solved, and the recovery rate of the waste heat of the high-temperature slag flushing water is improved.

Description

technical field [0001] The invention relates to the field of waste heat recovery in the metallurgical industry, and more specifically relates to a method and system suitable for recovery of waste heat from blast furnace slag flushing water. Background technique [0002] In the blast furnace smelting process, about 0.3 tons of blast furnace slag is produced for every 1 ton of molten iron produced, and the heat taken away by the blast furnace slag accounts for about 16% of the total energy consumption of the blast furnace. All go into the slag washing water, the temperature of the slag washing water can generally reach about 85°C, and it is released into the atmosphere with the circulation of the slag washing water, which not only wastes energy, but also causes waste of water resources and heat pollution. [0003] At present, there are mainly the following types of technologies for recycling waste heat from slag flushing water: [0004] Open waste heat utilization system for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06C21B3/08F27D17/00
CPCC21B2400/024C21B2400/08Y02P10/25Y02W30/50
Inventor 毛华芳田晓杰严阵曹盛华夏朝晖
Owner WISDRI ENG & RES INC LTD
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