SU1243857A1 - Apparatus for gas-liquid treatment of rolled product - Google Patents

Description

The invention relates to rolling production5 improves the process of cooling the bands during hot rolling and can be used to cool the roll in the roughing roll, on the intermediate roller table, as well as to prepare the strip on the discharge roller table before winding them into rolls.

The purpose of the invention is to improve the quality of the mixture and to make it possible to control the speed of the mixture.

FIG. 1 schematically shows the proposed device, a general view; in fig. 2 - one of the options for the installation of flexible conduit pipeline inside the conduit.

The device consists of a mixing pipe 15 provided in its output part with a flow divider 2 connected by taps 3 with distribution nozzles 4 and a gas-liquid nozzle 5 in its input part. The length of the mixture conductor 1 is provided with an elastic conduit pipe 6, for example in the form of a hose, with a pipe 7 for supplying a gas or liquid medium. The distribution nozzles 4 are perforated with round 1.1 or slit outlet openings that are split in the corridor or chess pores Towards the machining surface of the metal, the Flow Divider 2 is designed to distribute the two-phase mixture evenly over the outlets with minimal hydraulic conductivity of the flow during its distribution and is performed in the form of A bladder pipe 6 is made elastic, for example, in the form of a hose, which makes it possible to regulate the volume of the bore section of the blender 1 by varying the pressure of the gas or liquid medium fed through the pipe 7. As a result of the measurement (the ejection of the flow section of the mixing conductor, it is possible to regulate the flow rate of the mixture and the degree of spray at a given gas-to-liquid ratio.

The device works as follows.

In the gas-liquid nozzle 5 under pressure at the same time serves as a liquid component water and as a gaseous component air, superheated steam, neutral gas, etc., while the gas pressure

2-4 MPa should exceed the fluid pressure. In the process of interaction of the introduced components, the continuous noToica of the liquid is dispersed to the dispersed co-.

This is also when the rate of introduction of the gaseous component (above 60 m / s) increases, the degree of dispersion of the liquid reaches the aerosol State. The resulting fine flow comes from the output part of the nozzle 5 3 of the mixing pipe 1, where the flow is stabilized and averaged by equalizing the velocity profiles, dispersing the pressure and the continuous displacement process together moving the phases. The installation inside the mix-wire 1 of the elastic dead-conduit trz pipeline 6 is responsible for the speed of the mixture at a given

the ratio of gas to liquid, the degree of crushing of liquid droplets, and also contributes to the growth of the process of flow turbulization. Mixed and averaged atomized flow with

the 2 pct divider is divided into independent quantitatively and qualitatively equivalent flows. They move in the taps 3 to the distribution nozzles 4, through which they expire in the form of uniformly dispersed aerosol jets processing; its flow In case of need, for example, when the rolling speed changes,

its hermetic dimensions, chemical composition, etc., the regulation of the rate of flow of the mixture out of the dryer is determined by changing the volume of the flow section of the mixing conductor at a given gas-to-liquid ratio. Such regulation is ensured by the fact that the deep-well pipe 6 is made elastic, for example in the form of a hose 2, which allows a pressure or pressure change of the fluid through my pipe 7 to increase or decrease its volume. At the same time, it should be borne in mind that with an increase in the volume of the flexible conduit pipe 6 (of its flexible part) the volume of the flow section of the mix 1 decreases (the rate of flow of the mixture increases) and vice versa. With you

the optimal length of the mix-wire 1 is based on the conditions for the possibility of obtaining a quality one (ON the mixing of a two-phase flow at values of volume air content: not equal to 0.1-0.9).

Studies carried out on an experimental test bench at the Institute of Ferrous Metallurgy show that with the indicated values of volumetric air content the length of the mixing wire 1 should be rational within the limits of 5-15 of its hydraulic diameter. It is within these limits that the air-to-water flow is characterized by a stabilized value of the dispersion of water particles and formation in the form of a heterogeneous aerosol stream. The approximation of the divider 2 to the distance from the nozzle 5 is less than the lower one. limit leads to uneven distribution of flow on the taps. So, with the length of the mixing wire equal to four gauges, the uneven distribution of the flow along the outlets is

2438574

5% of the time. Removing the divider to the distance from the nozzle 5 more than the upper specified limit leads to the separation of the mixture and the precipitation of droplets.

5 water on the walls of the horizontal section of the mixing pipe 1 and the taps 3.

The advantage of the proposed device in comparison with the prototype is to increase the turbulence

The flow of its transverse pulsation, which leads to the additional disruption of liquid droplets, averages the profile. flow rate, reduces the amount of separation of the mixture in the process of its production, especially in horizontal areas. All this ultimately increases the degree of dispersion of the flow immediately before the divider. In addition, the invention allows

20 to increase the flow rate of the liquid and to regulate this speed in the event of a change in the speed of movement of the product, its geometrical dimensions, the chemical composition of the steel, etc. with

25 given the ratio of gas - liquid.

Compiled by O. Rum Nceva Editor S. Lisin Tehred I. Popovkch Proofreader L. Patay

Order 3743/11 Circulation 518 Subscription

VNIIPI USSR State Committee

for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR GAS-LIQUID PROCESSING OF RENTAL, including a sequentially located gas-liquid nozzle, a mix pipe, a flow divider connected by taps with distribution nozzles, characterized in that, in order to improve the quality of the rental by obtaining a more uniform mixture and providing the possibility of controlling its flow rate, [ the device is equipped with a coaxial mix-wire installed with an elastic deep-sea pipe with a pipe for supplying a gas or liquid medium. Fig. 1 b 3) 3 | £ l < V g ⁴ -2 _ --ABOUT- - 1 i t! I t ϊ ¹ 'ί 9 9 1243857 A1