In order to reduce the emissions of SO2, CO, CO2, dust and coal slag, the use of coal as fuel has been basically eliminated, and the use of heavy oil has become less and less. The majority of light oil is used. Natural gas is still the most ideal fuel. The waste heat utilization of the burner has reached a very high level. The optimization of the burner structure and the strict control of the air-fuel ratio ensure that NOx and CO are reduced to the minimum under the premise of reasonable combustion; gas carburization and carbonitriding are used And vacuum heat treatment technology is used to replace salt bath treatment to reduce the pollution of waste water and CN-toxic substances to water sources; water-soluble synthetic quenching oil is used to replace part of the quenching oil, and biodegradable vegetable oil is used to replace part of the mineral oil to reduce oil pollution. Waste water, waste gas, waste salt, dust, noise and electromagnetic radiation formed by heat treatment production will cause pollution to the environment. To solve the environmental pollution problem of heat treatment, the implementation of clean heat treatment (or green environmental heat treatment) is one of the development directions of heat treatment technology in developed countries.
Heat treatment equipment has many advantages such as fast heating speed, energy saving, non-oxidative decarburization, non-polluting environment and high production efficiency. These advantages are widely recognized by heat treatment workers, so they have developed rapidly in the past ten years. Of course, this actual demand has also greatly promoted the development and technological improvement of domestic induction heat treatment equipment. Taking Changchun's China FAW as an example, the company has more than 100 induction heat treatment equipment, including 50 new or updated equipment in the past ten years, almost all of which are thyristor intermediate frequency equipment and IGBT ultra-audio equipment. At present, the weight of induction heat-treated parts of FAW's medium-sized trucks reaches 291.3kg, accounting for 52% of all heat-treated parts. Induction heat treatment has really lifted the half of the heat treatment.
China is a major energy consumer, and the machinery manufacturing industry is an important part of it. With the continuous development of heavy industries such as parts and machinery manufacturing, heat treatment has an important supporting role in the revitalization and development of China's machinery manufacturing industry, and the development of the machinery manufacturing industry will also inevitably drive the rapid development of China's heat treatment industry and serve as China's heat treatment industry. Development provides a broad space for development, and the industry has broad development prospects. The 12th Five-Year Plan specifically pointed out that it is necessary to make full use of industry information platforms, promote new technologies, guide enterprise innovation, and vigorously develop energy-saving heat treatment; give full play to the advantages of technology research and development service platforms to provide support for industry energy conservation and emission reduction; give full play to the role of expert committee think tanks and carefully organize Recommended base project. my country is the most important equipment manufacturing base in the west, one of the four major automobile production bases, and the country's largest motorcycle production base. It is a frontier in the reform and innovation of the heat treatment industry.
Now people's awareness of the importance of this issue is far from reaching the level of awareness of the environment. The current national leaders and many people of insight are fully aware that the solution to this problem cannot be through preaching alone, and it is time to legislate and formulate regulations. The potential for efficient use, economical use, and reuse of resources such as fuel, electricity, water, and oil for heat treatment equipment is huge. The energy source of the heat treatment heating equipment must be reasonably selected according to local conditions and time, the thermal efficiency of the heating equipment has great room for improvement, the waste heat of the fuel product must be fully utilized, and a large amount of cooling water must be recycled and cleaned from the surface of the workpiece Fats and oils should be recovered separately, and the quenching oil that has failed should be collected, refined and reused or used for other purposes. In short, the effective use and regeneration of resources is an important part of the sustainable development strategy of the heat treatment industry.