Energy conservation and consumption reduction issues in drying equipment rooms

In recent years, various industries have put forward many requirements for energy conservation and rational energy utilization, and have also taken many effective measures. In particular, the utilization of coal, electricity, and water resources has become a crucial aspect that factories and mines must pay attention to. The following will introduce the energy conservation and consumption reduction issues related to drying equipment rooms.

1. The application of frequency converters in drying equipment significantly saves electricity.

Drying equipment typically uses large fans, which operate almost continuously. Using frequency converters can save up to 30% in energy costs. Adding a dust collector at the end of the dryer can halve the electricity cost, as the dust collector requires an even larger fan. Furthermore, using frequency converters significantly reduces overall equipment noise and extends the equipment's lifespan.

2. Energy-saving and consumption-reducing considerations are taken into account when selecting heat sources.

Drying equipment utilizes heat energy to dry materials with high moisture content. The utilization of heat energy plays a crucial role in the drying process. If heat cannot be removed promptly or circulation is poor, it will affect the entire system.

Heat energy can be generated in many forms, such as electric heating elements, natural gas, diesel, and coal, all of which can be used to generate heat energy through specific equipment. The heat sources equipped in our company's drying equipment include electric heaters, gas burners, oil burners, and coal-fired furnaces. Electric heating is widely used in small-scale drying equipment, typically in laboratories. It poses no pollution issues and heats up quickly. Combustion engines are mainly used in large-scale drying equipment, playing a crucial role in industrial production. In recent years, with the rise of the electronics industry, drying equipment has also seen significant development. For example, the DTP-300 drying equipment has a moisture evaporation rate of 300 kg/h. Using traditional electric heating would consume 265 kW-h of electricity per hour, while using a gas-fired burner would consume only about 45 m³ of gas per hour. The energy-saving effect of using a gas-fired heat source is obvious. Furthermore, the induced draft fan of the drying equipment used by the aforementioned users is controlled by a frequency converter, resulting in a high degree of automation and saving significant manpower and resources. Coal-fired hot air furnaces are also widely used as heat sources for dryers. They can be used directly in applications where material requirements are not stringent, such as in the production of protective slag in steel plants. In applications with strict material requirements, direct-fired hot air furnaces cannot meet the user's needs, necessitating the addition of heat exchange devices to reduce the degree of contamination to the materials.

3. Requirements for the Overall Thermal Insulation Performance of the Equipment

Drying equipment is a closed, slightly negative pressure system; heat loss in any part will affect the entire equipment. Due to the large volume and surface area of ​​the main tower of the dryer, our company's drying equipment uses 200mm thick insulation material and color steel plates for the main tower shell. This helps prevent heat loss and also enhances aesthetics. However, for special materials, other parts of the drying equipment, such as pipelines and dust collectors, must also be insulated; otherwise, the process and technical requirements cannot be met.

4. Core Components of the Drying Equipment

The design of the hot air distributor plays a crucial role in the energy saving and consumption reduction of the entire system. The system's heat energy can only come into contact with the material after being distributed by the hot air distributor; this process directly affects the degree of product drying. Technicians have invested significant effort in the design of the hot air distributor, developing a unique double-layer hot air distribution structure. This design ensures uniform airflow in all directions as hot air enters the upper part of the drying tower, swirling downwards within the tower for more effective moisture evaporation and to prevent moisture from sticking to the walls. This design has earned high praise from users.

5. Cooling Water Recycling

The drying equipment utilizes relatively large fans and pumps. Circulating water cooling is used for the motors, saving a considerable amount of water resources.

With the continuous development of the drying industry, the application of drying equipment is becoming increasingly widespread. However, improvements are still needed in key technologies (such as drying materials with high sugar content). Furthermore, significant efforts are required in the reuse of thermal energy. Collaborative research and innovation within the industry are essential for the rapid development of the drying sector.