SU1481214A1 - Method of controlling a glass-melting recenerative furnace - Google Patents

Abstract

The invention relates to the glass industry and makes it possible to increase the temperature uniformity of the glass melt. To achieve this goal, the temperature difference between the underwater space and on the unheated side of the furnace is determined, and the direction of the flame is translated with equal determined and specified values. 1 il.

Description

The invention relates to the glass industry.

The purpose of the invention is to increase the temperature uniformity of the glass melt.

The drawing shows a diagram of a device implementing a method for controlling a glass-making regenerative furnace.

The essence of the method is as follows. The production flow of the glass mass is formed from the center flow of the glass mass (along the longitudinal axis of the furnace) and side flows. The temperature of the central flow is stabilized by adjusting the fuel consumption based on temperature measured along the longitudinal axis of the furnace. The glass melt temperature on the sides of the furnace fluctuates over the time between transfers. These fluctuations are related both to the peculiarities of the operation of regenerative furnaces, when one side (working) heats up from the flare, and the other side (idle) cools down, and to the effect of local disturbances due to disturbances in the combustion process of the burners, etc. Perturbation control of the flame transfer is carried out on the basis of the temperature difference measured in the underflow space and on the unheated side of the furnace when this difference reaches a predetermined value.

The device contains a fuel consumption control loop consisting of a sensor 1 and a fuel flow setting device 2, a controller 3, an actuator 4 with a regulator 5 installed on a common fuel line to the burners on the left and right side of the furnace, conversion mechanisms 6 and 7 (in the drawing the transfer mechanism 7 is closed, and the mechanism 6 is

Yu

closed - the fuel goes to the burners on the left side of the furnace, air and waste gas transfer mechanisms are not shown), temperature setpoint 8, correction regulator 9, temperature converters consisting of temperature sensors 10-12, installed on the left and right sides and along the longitudinal axis of the furnace under the roof in front of the flow wall, and measuring devices 13-15 with output converters, switching unit 16, subtraction unit 17, unit 18, threshold element 19, time setter 20, OR element 21 and command unit 22 .

The control of a glass melting regenerative furnace is carried out as follows.

With the help of a control loop consisting of sensor 1, setpoint adjuster 2 of adjuster 3 and actuator 4 with regulator 5, the specified flow rate of fuel supplied through transfer mechanism 6 to the burners on the left side of the furnace is maintained. When the temperature deviation measured by the sensor 12 and the measuring device 15 from the value set on the setting unit 8, the correction regulator 9 changes the fuel consumption reference so that the temperature under the roof, and consequently, the output of the cooking part of the oven .

When the fuel is supplied to the burners on the left side of the furnace, the temperature of its right side decreases after switching the direction of the flame. A signal proportional to the temperature of the right (unheated) side of the furnace from sensor 11 through the measuring device 13 and the closed contacts of the switching unit 16 is fed to the first input of subtracter 17, to the second input of which a signal from the device 15 is fed. If the difference between the signals from the measuring devices 13 and 15 exceeds the value specified on the setting device 18, then the threshold element 19 is triggered, which, through its output contacts, activates through the OR element 21 the command block 22 — the direction of the flame is translated: conversion mechanism 6 opens, and mechanism 7 opens - the fuel goes to

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five

0

five

burners right side of the furnace block

16 switches switches to the unit

17, the measuring device 14. Since the left side was working, the deviations of the signals from the sensors 10 and 12 are slightly different from each other, and the difference between the signals from the devices 14 and 15 does not exceed the reference, therefore the threshold element switches

in the initial state - the scheme is prepared for operation. The next translation of the flame direction occurs at the moment when the difference between the signals from the instruments 14 and 15 exceeds a predetermined value or when a signal is sent from the time setting unit 20 after a specified period of time (the time setting is most often set to 30 minutes).

The advantage of the proposed method is that due to the correction of the translation of the direction of the flame according to the temperature difference measured along the longitudinal axis of the furnace and one (non-working) side of the furnace, a high temperature uniformity of the glass melt coming from the cooking part of the furnace to generation is achieved. The economic effect from the implementation of the control method for a glass-making regenerative furnace is achieved by improving the quality of the glass mass, which allows reducing the scrap during molding (from thickness, reducing the strength, breaking the geometry) by 2-3%.

Claims (1)

Invention Formula A method for controlling a glass-making regenerative furnace, which includes measuring the temperature in the underflow space and on the sides of the furnace, determining the temperature deviation in the underflow space from the set, correcting the fuel consumption depending on this deviation, and translating the flame direction, in order to increase the temperature uniformity the glass melts, determine the temperature difference between the space under the space and on the unheated side of the furnace, and the translation of the direction of the flame t with equal definable and given values. 6 in yyyy-RY-22- CH one BUT 0fe 22JZ.