Water spraying device for blowing-out of blast furnace

Abstract

The invention discloses a water spraying device for blowing-out of a blast furnace. The device comprises four spray gun bodies with heads, wherein the four spray gun bodies are horizontally and uniformly installed on a furnace shell wall at intervals in central symmetry, a nitrogen jet pipe is respectively connected on each side at the rear end of each spray gun body, each nitrogen jet pipe is connected with the spray gun body at a 45-degree angle, and the front end of each head is sealed; two rows of orifices are axially arranged at the lower edge of the bottom face of each head, two adjacent rows of the orifices are arranged in a staggered manner, and the included angle between the two rows of the orifices is 90 degrees, meaning that the included angle between the central line of each row of the orifices and the plumb line is 45 degrees. The water spraying device disclosed by the invention not only can improve the atomization effect of water sprayed, dilute H2 in coal gas, improve the cooling effect of the coal gas and reduce fire on furnace top and knock easily caused by CO, H2 and O2, but also avoids vapor explosion in the furnace as water is accumulated on a material level and a lot of steam is generated instantaneously during material slippery and material collapse.

Description

technical field [0001] The invention relates to a technology for shutting down a blast furnace ironmaking empty material line, in particular to a water fetching device for shutting down a blast furnace. Background technique [0002] During the process of stopping the blast furnace and lowering the material line (stopping the furnace when the empty material line is shut down), the blast furnace stops feeding, and as the material level moves down, the temperature of the furnace top continues to rise. In order to ensure the safety of the gas system and protect the furnace top equipment from being damaged by high temperature, according to the safety requirements of the furnace shutdown and equipment process requirements, the temperature of the furnace top gas must be controlled to less than 450°C. , Install 4 water guns evenly distributed in the circumferential direction on the upper part of the furnace body, the water spray nozzles are upward, the length of the water pipe is de...

AI Technical Summary

Problems solved by technology

This water pumping method has poor atomization effect, high water consumption, low heat exchange rate between water and gas, and long shutdown time. During the falling process of water droplets, it is easy to form water droplets that have not evaporated and fall to the high-temperature material surface, forming a water-gas chemical reaction. The splitting reaction with water produces CO, H2 and O 2 It is prone to fire and knocking on the top of the furnace; water is easy to accumulate on the material surface, and when the material collapses and collapses, a large amount of steam is generated instantaneously, and steam explosion occurs in the furnace; after the furnace is shut down, there is condensed slag iron shell on the material surface ; Heavy slag skins are easy to remain on the furnace waist and high heat load parts of the furnace bosh. This method is backward in technology, serious in environmental pollution, low in economic benefit and poor in safety.

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