China is a major textile country. In the textile industry, a large number of energy-consuming machines such as hot air stenter machines, mortar machines, dryers, etc. are needed. These machines will generate a lot of heat energy. Generally, electricity, fuel oil, or steam are used as heat sources. . The operating temperature of heat-consuming machinery in the textile industry is generally below 200°C, and a large amount of waste heat is discharged after production. How to use this waste heat as much as possible to reduce the heat energy consumption of heat-consuming equipment is an important task for energy saving and consumption reduction in the textile industry.
The hot air stenter machine (or stenter) is one of the main energy-consuming machines in the textile industry. The hot air stenter machine is a device that uses hot air to dry and arrange textiles (such as cloth) and shape them. Generally, the temperature required in the hot air stenter machine is about 200°C, and the temperature of the waste heat leaving the hot air stenter machine is generally about 170°C. Therefore, a large amount of waste heat is discharged into the air and negative pressure is formed in the drying room. The entrance and exit cannot be airtight, and room temperature air will quickly be replenished through the entrance and exit. Due to the large temperature difference between the inside and outside of the machine, it will consume a lot of energy and have a certain impact on product quality.
After adopting heat pipe heat recovery, the clean hot air can be preheated to about 100℃, and it can be sent into the drying room or sent to the drying room to form an air curtain so that the drying efficiency can be improved, and the user can improve on the original basis. Speed, reduce the occurrence of water vapor, reduce the color difference of the finished product.
The recovery of the hot air stenter machine is gas-gas recovery. The discharged hot air is used to heat fresh air and then return to the hot air stenter machine. If the hot air stenter machine directly burns gas or light diesel oil, part of the preheated air can also be used as combustion air to improve The efficiency of the burner. If the temperature of the waste heat is higher after heat recovery, you can also recover the second heat to heat fresh air or water.
After the exhaust gas discharged by the hot air stenter machine is recovered by the waste heat, energy is saved, the economic benefits are significant, and the social-environmental benefits are obvious. At the same time, combined with pollution control technology, it can greatly increase energy efficiency while eradicating the emission of harmful substances in printing and dyeing waste gas from the source. It is a composite technology with multiple functions such as energy saving, pollution control, and efficiency.