RU1836432C - Nozzle of blast-furnace tue apparatus - Google Patents

Abstract

Usage: black metallurgists, in particular blast furnace production. SUBSTANCE: in a nozzle of a tuyere device containing a lined casing, a head and a burner for passing fuel additives in the end part of the burner facing the incoming flow of blowing, a static pressure receiver is installed — blow on the inner wall of the nozzle channel, parallel to its axis, pressure receivers are made point . The device allows to reduce the consumption of coke, 1 sludge.

Description

The invention relates to ferrous metallurgy, in particular to blast furnace production, and can be used to measure the flow rate of hot blowing through a tuyere device, as well as in the system for automatically controlling the semi-tuyere ratio of additional fuel supplied to the furnace of a blast furnace and to burn hot.

An object of the invention is to reduce coke consumption.

The goal is achieved in that a point detector of full pressure is installed in the nozzle of the tuyere device, in the end part of the burner facing the incoming flow, and a point receiver of static pressure is installed in the nozzle channel, parallel to its axis. The height of such a head with a burner is practically absent, so there is no need for calibrations here.

A known nozzle of a tuyere device (prototype) comprises a lining casing, a head and a burner for introducing fuel additives brought into the axial zone of the nozzle channel.

The proposed nozzle of the tuyere device of the blast furnace differs from the prototype in that a point receiver of full pressure is installed in the end part of the burner facing the incoming flow, and in the inner wall of the nozzle channel is parallel to its axis. a static pressure blower is installed.

A comparative analysis of the known technical solutions and the claimed one did not find similar signs in them. Therefore, the inventive device has novelty and significant differences.

The proposed new and significant design changes of the nozzle will allow us to determine continuously the actual flow rate through the nozzle by the expression:

cl

with

00

with

ON

4 00

Yu

with

Q

s, (1)

where Q is the flow rate through the nozzle, m3 / s;

AR- high-speed pressure of the flow of mountains of which to blow, kg / m,

y-specific gravity blow, kg / m3;

S is the area of the inlet section of the nozzle channel, m2 ;;

d-9.81 m / s2; v. and dynamically control the flow rate of the fuel additive in proportion to the flow rate through the nozzle. As a result, uniform burning of coke in the tuyere centers will be ensured, and, as a result, the charge will converge uniformly around the circumference of the blast furnace. The use of natural gas and its conversion products will improve. Due to the arising improvements in the domain process, Coke Savings of 1-2% will be achieved.

The device is shown in the drawing.

The device consists of a metal casing 1, on the inner surface of which there is a heat-resistant lining 2. A water-cooled head 3 is located in front of the nozzle 3. A special burner 4 is brought out through the body of the water-cooled head into the nozzle channel 4. Hot blast enters the nozzle channel and enters a point pressure transmitter 5. For measuring static pressure, a point pressure receiver b is installed in the side wall of the nozzle.

For a blast furnace and hot blast entering the furnace, the quantities included

in the formula (1). have the following exemplary values:

y 1.0 kg / m3; S - 0,0314m2

The value of the velocity head of the hot blow flow measured by a differential pressure gauge is approximately 1135 Pa.

. The flow rate through the tuyere device where such a high-pressure head (A P) is measured will be equal to:

fifteen

.9.81o113.5: .00314 1 | 48M3 / s

The measured flow rates of hot blow through tuyere devices allow the redistribution of natural gas in proportion to the tuyere flow rates of hot blow.

Claims (1)

SUMMARY OF THE INVENTION A nozzle of a blast furnace tuyere device comprising a lined casing, a hunger and a burner for in-line injection of fuel additives discharged into the axial zone of the nozzle channel, full and static pressure detectors are blown, and the full pressure detector is blown on the end of the burner, which is facing as a free flow , other than that in order to reduce coke consumption, a static pressure receiver is installed on the inner wall of the nozzle channel, parallel to its axis, pressure receivers are made point. QmSpf) § v v v v v fc v v v viv fc v v v- v 4Jv v - i I /////// St ////// // f / 7 / / x / K . Qrnfiop static pressure blow