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Method and system for real-time control of gas supply to glass kiln

A real-time control and supply technology, applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve problems such as overshoot, unstable delay, and fluctuation of fuel volume, and achieve automation and save labor costs. Effect

Active Publication Date: 2022-04-22
BENGBU TRIUMPH ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of large inertia and pure hysteresis of the glass melting furnace, as well as the delay and instability of manual control, there are large fluctuations in the adjustment of the fuel amount, especially in the process of changing the fire, which is prone to overshooting, which in turn leads to large temperature fluctuations

Method used

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  • Method and system for real-time control of gas supply to glass kiln
  • Method and system for real-time control of gas supply to glass kiln
  • Method and system for real-time control of gas supply to glass kiln

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Effect test

Embodiment 1

[0070] In this embodiment, a melting furnace with natural gas as fuel is taken as an example, and the composition data of natural gas are as follows.

[0071] Table 1 Natural gas composition data

[0072]

[0073] Considering that the main component of natural gas is CH 4 , in order to simplify the calculation, only CH is considered in natural gas 4 , the chemical equation of the combustion reaction can be listed as follows.

[0074] CH 4 +b(O 2 +3.76N 2 ) = CO 2 +2H 2 O+(b-2)O 2 +3.76bN 2 (1)

[0075] Where b represents the volume ratio of oxygen to gas, converted to the volume ratio of air to gas for Converted to Excess Air Coefficient then

[0076] Since the volume of the melting furnace is fixed, we should calculate its constant volume adiabatic combustion temperature, and obtain from energy conservation:

[0077] h reac -H prod -R u (N reac T init -N prod T ad )=0 (2)

[0078] where H reac For the reactants at the initial temperature T ini...

Embodiment 2

[0097] In the glass production line, Sichuan Chuanyi thermocouples are mostly used to collect and measure the temperature of the furnace space, and A+K flowmeters are used to collect flow signals. The measuring instruments used in the furnace are as follows:

[0098] thermocouple name model unit quantity TE-207 on the top of the melting part WRB-0316-PM-1000R850-ZA1FHZ01 branch 1

[0099] product name model unit quantity FE-110 AKHFD012P231216MAMBN,DN300 set 1

[0100] If the amount of gas is increased or decreased under the condition of stable combustion, the first step is to Calculate the new air / gas volume ratio, and then by Calculate the oxygen / fuel gas volume ratio, and finally substitute it into the formula (7) to calculate the change of the actual combustion temperature.

[0101] In the case of stable combustion in the furnace, increasing or reducing the amount of gas, the change in the temperature of the f...

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Abstract

The invention discloses a method for controlling the gas supply of a glass melting furnace in real time, comprising the following steps: S1, obtaining the current temperature T of the space in the glass melting furnace act ; S2, the T act Input to the gas supply model of the DCS combustion system, output to get V at the current moment gas ; S3, CNC center according to the current V gas , send instructions to the regulating valve at the gas inlet pipe of the glass melting furnace to adjust the opening of the regulating valve. The invention also discloses a system for real-time controlling the gas supply of the glass melting furnace. The invention has the advantage of directly changing the set value of the fuel quantity through the control system, thereby adjusting the temperature of the melting furnace.

Description

technical field [0001] The invention relates to the technical field of glass melting furnaces, in particular to a method and a system for real-time controlling the gas supply of glass melting furnaces. Background technique [0002] The glass industry is a high-energy-consuming industry, in which the energy consumption of the glass melting furnace accounts for more than 80% of the glass industry, while the fuel cost accounts for 35% to 50% of the glass cost. Glass products are mostly prepared by float glass melting furnaces, such as the float glass melting furnace disclosed in patent application 201710375067.7. However, most of the float glass production lines in my country consume 6500kJ / kg-7500kJ / kg of energy per unit mass of molten glass, and the thermal efficiency of the entire glass melting furnace is only 30%-40%. However, the unit energy consumption of advanced float glass enterprises in the world is only 5800kJ / kg, and the thermal efficiency of their melting furnaces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B5/24C03B5/235
CPCC03B5/24C03B5/2353
Inventor 黄嗣熠郑纤秀夏鹏华卢佩庆陶洪洋徐超王亮黄广楠王海荣杨华龙
Owner BENGBU TRIUMPH ENG TECH CO LTD