How can the noise generated by grain dryers be reduced during operation?

Traditional methods of drying rice are limited by natural weather conditions, human labor, and site constraints, and are no longer adequate to meet the production needs of large-scale grain farmers.

Mobile grain dryers use hot air as a drying medium and adopt a circulating drying process, which ensures that grains are heated and dried uniformly and thoroughly with good quality after drying.

Using coal, firewood, straw, or rice husk as fuel, the process of burning and heat exchange converts the air into clean hot air. This method of drying grain is not only pollution-free but also saves time, energy and effort. The dried grain can be stored or sold directly after drying.

The fan is a crucial component of the mobile grain drying equipment system. There are two types of fans: the induced draft fan and the forced draft fan. The induced draft fan is responsible for rapidly exhausting waste gas produced during the drying process, while the forced draft fan provides fresh air to the heating equipment of the drying system. However, during operation, the fan generates significant noise, including mechanical and aerodynamic noise. The primary sources of noise are from the fan itself and from the inlet, outlet, and exhaust pipes.

To reduce fan noise, there are several methods available:

1. Sound insulation:

Place the fan in a soundproof room to minimize external noise or use sound-absorbing materials to reduce decibels in the forced draft fan room.

2. Noise elimination:

Install different types of silencers on the inlet and outlet pipes of the mobile grain drying equipment system's fans to reduce noise.

3. Use thick-walled pipes or pipe insulation to prevent resonance.