Method for improving thermal efficiency of industrial furnace kiln by virtue of detecting flame condition and regulating oxygen enrichment flow

Abstract

The invention discloses a method for improving the thermal efficiency of a combustion furnace by virtue of detecting the flame condition and regulating the oxygen enrichment flow, and the method is especially suitable for an industrial furnace kiln provided with an oxygen enrichment combustion-supporting device and can be used for improving the thermal efficiency of the industrial furnace kiln. The method comprises the following steps of: an optoelectronic signal conversion step, a signal processing step, and a signal analysis and oxygen enrichment flow regulating step. According to the method for improving the thermal efficiency, in the signal processing process, the flame intensity signal and flame flickering frequency signal of a combustor are respectively subjected to amplification treatment, so that the flame intensity signal and the flame flickering frequency signal in flame signals can be effectively identified, and the distortion phenomenon of the flame flickering frequency signal is eliminated; and by virtue of the correlation analysis on data collected during the burning process, the oxygen enrichment flow in the oxygen enrichment combustion-supporting device is regulated, fuels are fully burned, and thus the thermal efficiency of the industrial furnace kiln is improved.

Description

[0001] technical field [0002] The invention relates to a method for adjusting the oxygen-enriched flow rate and improving the thermal efficiency of a combustion furnace by detecting the flame state, and is especially suitable for industrial furnaces equipped with an oxygen-enriched combustion-supporting device to improve the thermal efficiency. Background technique [0003] Today’s world is short of energy, and the prices of various types of fossil energy have risen sharply. The benefits of many large energy-consuming enterprises have been greatly reduced, which seriously hampers the long-term development of enterprises, especially the phenomenon of enterprises using industrial furnaces is more obvious. Consumption has become an inevitable way to improve enterprise efficiency. As the country pays more and more attention to energy saving and emission reduction, many enterprises have been equipped with oxygen-enriched combustion-supporting energy-saving devices. [0004] At...

AI Technical Summary

Problems solved by technology

[0005] 1. Only pay attention to the use of advanced oxygen production technology to obtain oxygen-enriched gas with a concentration of about 30%, replace part of the combustion air to reduce the air intake, thereby reducing the heat taken away by the inert gas, and at the same time increase the oxygen content to promote combustion to achieve energy saving; but not Not making full use of these oxygen-rich resources to increase its thermal radiation efficiency

[0006] 2. Since different types of fuels burn with different flame flicker frequencies, the flame intensity of each flame flicker frequency is also different, so different types of fuels require different oxygen-enriched flow rates when burned. The oxygen-enriched combustion-supporting device cannot be based on actual It is difficult to achieve the expected energy-saving effect by adjusting the flow according to the situation

[0007] 3. It is unreasonable to match the oxygen-enriched flow completely by experience: combustion is a very complicated chemical process, which has nothing to do with the furnace heat radiation and its distribution, so it is not reasonable to match the oxygen-enriched flow by visually observing the flame and the air volume of the combustion-supporting fan Scientifically, this often occurs: 1. The oxygen-enriched flow configuration is too large, resulting in waste of investment costs for customers; 2. The oxygen-enriched flow configuration is too small to achieve the expected energy-saving effect