I. Introduction:

   In my country's non-ferrous metal industry, most melting furnaces use flame furnaces to melt materials. In the Pearl River Delta region of Guangdong, Luoyang, Xuchang, Zhengzhou, and the Yangtze River Delta region, where aluminum processing is most intensive in my country, only clean fuels can be used due to fuel source issues and national environmental protection requirements. Therefore, fuel consumption costs account for an increasing proportion of processing costs. At present, relevant research institutions and processing companies continue to explore new alternative energy sources and technologies to reduce costs. In view of this, after years of research and experimentation, as well as the successful experience at home and abroad, we decided to promote high-temperature air combustion technology (regenerative combustion technology) using biomass natural gas as fuel. Biomass natural gas fuel regenerative combustion technology can greatly reduce energy consumption and minimize the user's fuel consumption. At the same time, it can also meet the most stringent environmental protection indicators, and the relevant emission indicators meet the most stringent environmental emission standards (2+26 urban emission standards). At the same time, it can achieve the requirements of carbon neutrality advocated by the state, which can be said to serve multiple purposes. The regenerative combustion technology of biomass gas fuel provides ideal energy-saving and environmental protection technologies for non-ferrous metals, metallurgy, heat treatment, mechanical processing, building materials and other related industries that use fuel to heat. Significantly reduce the user's fuel cost consumption. In order to achieve clean combustion and carbon neutrality, it provides high-quality and low-cost renewable clean energy, which is an ideal alternative technology for high-priced energy.

   2. Technical introduction:

   1. Brief introduction of high temperature air combustion technology:

   The regenerative high-temperature air combustion technology is referred to as HTAC technology in Japan, the United States and other countries, and it is referred to as HPAC (Highly Preheated Air Combustion) technology in some Western European countries, also known as Flameless combustion technology. The basic idea is to let the fuel burn in an atmosphere of high temperature and low oxygen concentration. It contains two basic technical measures: one is the use of a regenerative heat exchange device with a temperature efficiency of 95% and a heat recovery rate of more than 80% to maximize the recovery of sensible heat in the combustion products for preheating the combustion air , To obtain combustion-supporting air with a temperature of 800-1000°C (80-150°C lower than the furnace temperature); the other is to adopt fuel staging combustion and high-speed air flow to entrain the combustion products in the furnace to dilute the oxygen volume concentration in the reaction zone to obtain A low-oxygen atmosphere with a concentration of 3-15% (volume). In this high-temperature and low-oxygen atmosphere, the fuel first undergoes recombination processes such as cracking, resulting in completely different thermodynamic conditions from the traditional combustion process, and releases heat energy under delayed combustion with oxygen-lean gas, and no longer exists in the traditional combustion process. The emergence of local high temperature and high oxygen zone. This combustion is a dynamic reaction and does not have a static flame. It has many advantages such as high efficiency, energy saving and ultra-low NOX emissions. Since the advent of the regenerative high-temperature air combustion technology, it has immediately received great attention from developed countries such as Japan, the United States, Sweden, the Netherlands, the United Kingdom, Germany, and Italy. Its application in the heating industry has been rapidly promoted and has achieved worldwide attention Energy saving and environmental protection benefits.