Blast furnace water-cooling wall water scale rapid washing and heat transfer enhancement device

Abstract

The invention provides a blast furnace water-cooling wall water scale rapid washing and heat transfer enhancement device, comprising a solid-liquid two-phase flow system which integrates sand adding and sand returning and is used for cooling water scales of a water cooling pipe in a blast furnace water-cooling wall cooling system, wherein the solid-liquid two-phase flow system comprises a sand adding and sand returning barrel and a filtering screen net; the filtering screen net is filled with washing grains; a lower end outlet of the filtering screen net is provided with a sand adding pipe which is used for supplying sand to the water cooling pipe in a water cooling wall; an upper inlet of the filtering screen net is provided with a sand returning pipe for recycling sand water discharged from the water cooling wall; the side wall of the sand adding and sand returning barrel is provided with a water outlet connection pipe opening; the water outlet connection pipe opening is communicated with a circulating water tank through a water returning branch pipe; and a drain outlet is arranged at the bottom of the sand adding and sand returning barrel and a blow-down valve is arranged at the drain outlet. The blast furnace water-cooling wall water scale rapid washing and heat transfer enhancement device is arranged in the blast furnace water-cooling wall cooling system to be in parallel to the circulating water tank; and water flow switching is carried out through a three-way split-flow valve and a three-way flow collecting valve, so as to rapidly wash the water cooling pipe of the cooling wall needing to be washed and the inner wall of a water cooler.

Description

technical field [0001] The invention relates to the technical field of quick cleaning of scale on a heat transfer surface and enhanced heat transfer, water saving and energy saving, in particular to a device for quick cleaning of scale on a water wall of a blast furnace and enhanced heat transfer. Background technique [0002] In order to ensure the temperature of steelmaking and the quality of molten steel and prolong the life of blast furnaces, generally blast furnaces use water-cooled walls to cool down the blast furnace. The cooling water pipes are buried in the water-cooled walls of the blast furnace. of heat. In actual production, with the increase of the operation time of the blast furnace, scale is continuously deposited on the inner wall of the cooling water pipe in the cooling wall, which seriously affects the cooling effect of the blast furnace. Studies have shown that the cooling capacity of the cooling wall will drop by 80% due to the deposition of 1mm scale on ...

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Problems solved by technology

[0004] At present, the commonly used scale cleaning methods for blast furnaces are: parking high-pressure water washing, which greatly affects production efficiency; adding chemical agents to circulating water, which is likely to cause equipment corrosion and pollute the environment; The construction volume and difficulty of the transformation are relatively large, and at the same time, the resistance of the fluid flow is greatly increased, which may lead to insufficient head of the circulating water pump and affect the normal circulating water cooling of the cooling wall

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