In the special article of this issue, the editor (Jiangxi Xinjinhui Intelligent Technology Co., Ltd., Shenzhen Xinjinhui Energy Saving Technology Co., Ltd., Dongguan Pengli Energy Saving Equipment Co., Ltd.) brings you the development history of the equipment. You can learn about it through this article Let’s look at the evolution of tunnel furnaces from the 1960s to the present in terms of design, technology, materials, industry applications, economic benefits, etc. If there is any bias, please correct me.
1. The origin of tunnel furnace
It is said that the tunnel oven can be traced back to the Song Dynasty and Qing Dynasty. It was inspired by traditional ovens and combined with restaurants or banquets to meet the rapid supply of large quantities of cattle, sheep, ducks and other roasted foods. In the early days, the capacity was only larger. With the development of time, until the early 1960s, under the impact of modern industrial technology and the social background of that year, in order to solve the mass production needs of the food industry, the first generation of tunnel furnaces came into being. Although the design and function Simple, but with the special structure of the tunnel furnace and the characteristics of large-volume continuous production, the production efficiency at that time was greatly improved.
2. Development and changes of tunnel furnace
The tunnel furnace began its evolutionary journey in the 1970s
With the great success and widespread popularity of tunnel furnaces in the food industry, tunnel furnace technology has also been vigorously promoted. In the 1970s, based on the accumulation of production application experience and the continued rise in production and economic demands, people began to pay attention to tunnel furnaces. The pursuit of energy efficiency value of furnaces is also constantly improving. Tunnel furnaces have been continuously improved in terms of design, function and control. At the same time, benefiting from the development and progress of material science and the combination of tunnel furnaces, the loss problem of tunnel furnaces has been alleviated. At the same time, Thermal efficiency has also been improved.
In the 1980s, tunnel furnaces flourished and developed rapidly.
In order to adapt to the application needs of different industries, tunnel furnaces have derived diversified furnace types, which are widely used in food, textile, die-casting small parts and other industries, as well as pharmaceutical factories, traditional Chinese medicine factories, beverage factories, daily chemical factories, electronic factories, and auto parts factories. and other factory areas.
As a baking equipment, tunnel furnaces require frequent maintenance and replacement of wearing parts due to high-temperature production conditions. Therefore, tunnel furnaces have begun a modular design trend, which improves the maintainability of the equipment and has independent module maintenance and The ability to upgrade; stainless steel has also become popular in equipment materials, especially the furnace body and internal structure, thereby improving the heat resistance and corrosion resistance, and improving the durability and safety of the tunnel furnace.
The initial automation stage of tunnel furnaces in the 1990s
With the vigorous development of science and technology in all fields such as computers, automation, and high-efficiency electric heating elements, tunnel furnaces have achieved high levels of innovation and rapid development with the introduction of high and new technologies. The level of automation, temperature control technology, and thermal efficiency of heating technology have been rapidly improved. The equipment technology and energy efficiency of tunnel furnaces have achieved leaps and bounds.
In terms of automation, although most operations still need to be completed manually, simple conveying and automated control systems have begun to be equipped, which greatly saves labor and has begun to enter the preliminary automation stage.
Benefiting from breakthroughs in heating technology, such as far-infrared heating, microwave heating, hot air circulation drying, electric heating tube and other technologies, the temperature and time control are more controllable and accurate, and the heating is more uniform.
Therefore, tunnel furnaces are gradually being widely used in high-end precision industries such as electronics, optics, semiconductors, medical equipment, and LED/semiconductor packaging, especially in industries such as electronics and PCB circuit boards where market demand is rapidly expanding.
And with the awakening of the concept of environmental protection, comprehensive efficiency, energy conservation and emission reduction have begun to be gradually paid attention to, and related technologies are also constantly developing, thus improving the economic benefits of tunnel furnaces.
Since the beginning of the 21st century, tunnel furnaces have entered the development path of intelligent automation, energy saving and low carbonization.
With the empowerment of computers, sensors, Internet of Things, big data, AI, 5G and other technologies, tunnel furnaces have achieved a highly automated stage and can realize intelligent operations with few or even unmanned people. According to the needs of the tunnel furnace drying process, Intelligent automatic control, such as frequency conversion temperature control, automatically adjusts the power of the heating element, fan, and wind wheel to maintain nearly constant temperature baking.
At the same time, in order to reduce costs and comply with the requirements of the national energy-saving and low-carbon policy, energy-saving indicators have become important indicators of industrial production. Since the 21st century, tunnel furnaces have also made great progress in energy-saving levels. As tunnel furnace equipment continues to mature, tunnel furnaces The design of the oven is also becoming more scientific and reasonable. Through structural optimization, heat loss is avoided, thermal energy efficiency and utilization are improved, and the length of the baking area is shortened through process improvement, reducing heat waste in the baking space. Combined with air duct design and intelligent Control technology, insulation technology, etc., drive the improvement of energy saving level in all aspects.
3. Future trends of tunnel furnaces
In the future, tunnel furnaces will continue to upgrade and develop in terms of energy saving, cost reduction, efficiency improvement, safe production, and green manufacturing. Among the more representative ones are Xinjinhui (headquartered in Jiangxi Xinjinhui), a brand known as the vane of energy-saving technology for PCB circuit board tunnel furnaces. Intelligent Technology Co., Ltd., with subsidiaries Shenzhen Xinjinhui Energy Saving Technology Co., Ltd., Dongguan Pengli Energy Saving Equipment Co., Ltd.), etc. For the needs of tunnel furnaces in high-precision and high-demand industries, we can basically provide customized solutions and equipment technology customization services.
Post time: Aug-19-2024