Gas-mist spray pipe for cooling plate belt material

Abstract

The invention relates to a gas-mist spray pipe for cooling a plate belt material. The gas-mist spray pipe comprise a gas collecting pipe, wherein a cooling water collecting pipe is arranged inside the gas collecting pipe through a support plate; the two ends of the gas collecting pipe are provided with an inlet sealing plate and an outlet sealing plate respectively; the outer end of the inlet sealing plate is provided with a water supply pipe and a gas supply pipe; the water supply pipe is communicated with the cooling water collecting pipe; the gas supply pipe is communicated with the gas collecting pipe; and the lower part of the gas collecting pipe is provided with a plurality of nozzles at intervals. Due to the adoption of the gas-mist spray pipe, cooling water can be sprayed onto the surface of a cooled object after being atomized into fine particles under the action of compressed air, and heat on the surface of the cooled object is taken away under the action of forced heat exchange between fine liquid drops and the surface of the cooled object; and the cooling capability of the gas-mist spray pipe is adjusted by adjusting the water flow separately.

Description

technical field [0001] The invention relates to a cooling device for the heat treatment link of a plate and strip, in particular to an air-mist nozzle used for cooling the plate and strip. Background technique [0002] At present, the technologies used for plate and strip cooling are mainly water spray cooling (WSC, Water Spray Cooling), gas jet cooling (AJC, Air Jet Cooling), etc., among which water spray cooling is widely used in plate and strip cooling. Rapid cooling, such as the rapid cooling section after the furnace of the CP unit, etc. Water spray cooling is that the cooling water is sprayed onto the surface of the cooling object through the cooling nozzle or the cooling nozzle at a certain pressure, a certain angle, and a certain water flow density. A cooling method for the object to be cooled. At present, there are mainly the following problems in water spray cooling: 1. Cooling capacity, water spray cooling capacity is related to factors such as the surface tempe...

AI Technical Summary

Problems solved by technology

At present, water spray cooling mainly has the following problems: 1. Cooling capacity, water spray cooling capacity is related to factors such as the surface temperature of the cooled object, water flow density, water droplet velocity, water droplet size, and the surface state of the strip

When cooling a high-temperature object, an air film is easily formed on the high-temperature surface to prevent the jet water droplets from contacting the surface, resulting in low cooling capacity

Therefore, it is not suitable for cooling high-temperature objects or high-temperature range cooling of high-temperature objects; 2. Cooling capacity adjustment, because water spray cooling must be realized through water nozzles, and the nozzles must work normally under specific working conditions (such as pressure, flow, etc. ), so it is difficult to adjust the cooling capacity of the water spray pipe by changing the water flow density (that is, the water flow rate), so the adjustment of the water spray cooling capacity is limited; 3. Cooling uniformity, through the water spray nozzle or spray The size of the liquid droplets sprayed by the tube is large, and the distribution on the surface of the object is uneven, which directly leads to uneven cooling of the object, causing some cooling defects, such as strip steel scooping, uneven structure, uneven performance, etc., which seriously affect the quality of the strip steel

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