Closed circulation cooling system of blast furnace and non-shutdown online switching method of closed circulation cooling system

Abstract

The invention relates to a closed circulation cooling system of a blast furnace and a non-shutdown online switching method of the closed circulation cooling system. The closed circulation cooling system comprises an air cooler I, an air cooler II, a filter I, a filter II, a degassing tank I, a degassing tank II, a drainage ring pipe I, a drainage ring pipe II, a water supply ring pipe I, a water supply ring pipe II, a circulating water pump I and a circulating water pump II, wherein the degassing tank I, the air cooler I, the filter I, the circulating water pump I, the water supply ring pipe I, the drainage ring pipe I and the degassing tank I are connected with one another; the circulating water pump I is also connected with the water supply ring pipe II; and the water supply ring pipe II, the circulating water pump II, the air cooler II, the filter II, the degassing tank II, the drainage ring pipe II and the water supply ring pipe II are connected with one another. The closed circulation cooling system has the advantages that the non-shutdown online switching of the circulation cooling system is realized through pressure equalization and parallel operation, and the cooling intensity of cooled equipment is improved, so that the service life of the cooled equipment is prolonged, and the aim that the production is not influenced and the cooled equipment is not damaged during switching is achieved.

Description

technical field [0001] The invention belongs to the technical field of heat exchange, and in particular relates to a closed-circuit circulating cooling system of a blast furnace and an on-line switching method without stopping the furnace. Background technique [0002] The soft water used for cooling the two blast furnaces of Bayuquan Iron and Steel Branch of Anshan Iron and Steel Co., Ltd. is a closed-loop cooling method. The soft water is supplied to the furnace hearth and furnace body in parallel. The maximum water volume of the furnace hearth can only reach 3500m3 / h, resulting in limited cooling capacity In order to enhance the cooling capacity of the furnace hearth, a closed-loop cooling system is added to cool the furnace hearth alone to enhance the cooling capacity of the furnace hearth, and the two cooling systems operate in parallel. Conventionally, the two independent cooling systems of the blast furnace need to be switched off during switching, which affects the p...

AI Technical Summary

Problems solved by technology

Conventionally, the two independent cooling systems of the blast furnace need to be switched off during switching, which affects the production of the blast furnace, and the circulation system is stagnant during the switching process. At this time, the cooling water in the system does not flow, and the heat in the cooling components cannot be transferred. If it is taken away, it will cause the temperature of the cooling parts to rise, and seriously damage the cooling parts, resulting in major economic losses

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