DW (18)

Belt-type Dryer

 I. Main Features

1. **Large-capacity Processing**: It has a relatively large loading space and can handle a large amount of materials at one time, meeting the needs of large-scale production. This effectively improves production efficiency and reduces the unit production cost.

2. **High-efficiency Drying Performance**: By adopting advanced drying technology and a reasonable structural design, it has a high heat transfer efficiency. It can quickly remove the moisture from the materials, greatly shortening the drying time and enhancing the overall production efficiency.

3. **Multifunctional Applicability**: It is not only suitable for the drying of various fruit slices but also widely applicable to the drying treatment of many types of materials with certain air permeability, such as dehydrated vegetables, traditional Chinese medicinal materials, food particles, etc., in the form of flakes, strips or granules. Its application range is extremely extensive.

4. **Stable Heat Source Supply**: Taking steam as the main heat source, steam can provide stable and uniform heat, ensuring that the materials are evenly heated during the drying process. Thus, it guarantees the consistency of the quality of the dried products and reduces the defective rate.

5. **Energy Conservation and Environmental Protection**: Through the optimized hot air circulation system and a reasonable design for heat energy utilization, it effectively reduces energy consumption and lowers the carbon emissions during the production process, meeting the requirements of modern industry for energy conservation and environmental protection. ## II. Machine Structure

1. **Air Inlet System**: It is composed of a primary filter, a medium-efficiency filter, a high-efficiency filter (optional configuration), and a heater with high-precision temperature control. The air inlet system can carry out multi-stage filtration of the air entering the dryer, removing impurities and dust in the air to ensure the cleanliness of the drying environment. At the same time, according to the drying requirements of the materials, the flow rate, speed, and pressure of the inlet air can be precisely controlled. The heater can be in various forms such as a steam radiator, an electric heater, or a gas furnace, flexibly adapting to different energy conditions.

2. **Main Machine Structure**: The core component is a mesh belt made of 12-60 mesh stainless steel mesh, which is driven by a reliable transmission device to ensure the stable and uniform operation of the mesh belt. The main structure of the main machine also includes a belt transmission device, a heater, and an exhaust fan. The heaters are evenly distributed around the mesh belt to provide sufficient heat for the materials; the exhaust fan is responsible for promptly discharging the moisture and exhaust gas generated during the drying process, maintaining the air circulation and humidity balance inside the dryer.

3. **Exhaust Air System**:

In order to achieve environmentally friendly emissions, an exhaust air dust removal filter can be configured according to actual needs. This filter can effectively capture and remove dust and particulate matter in the exhaust gas, reducing environmental pollution. At the same time, it also helps to recover some valuable material particles and improve the utilization rate of resources. 

III. Working Principle of the Dryer The materials are evenly spread on the mesh belt by the feeder. The mesh belt, driven by the transmission device, moves slowly and steadily inside the dryer. The inside of the dryer is divided into several independent drying sections, and the hot air in each drying section circulates separately. During the hot air circulation process, part of the exhaust gas is discharged through a special dehumidification fan, and the amount of exhaust gas emissions is precisely controlled by the regulating valve. The hot air penetrates the material layer on the mesh belt, comes into full contact with the materials, and takes away the moisture in the materials to achieve the drying of the materials. The running speed of the mesh belt can be adjusted freely according to the characteristics of the materials and the drying requirements to ensure that the materials can reach the ideal drying effect within the optimal drying time. In addition, according to the specific needs of users, the top and bottom circulation units can be flexibly configured to further optimize the distribution and circulation path of the hot air, improving the drying efficiency and quality. The number of drying sections can also be reasonably selected according to the production scale and the drying difficulty of the materials to meet different production needs. 

IV. Application Scope of the Dryer

1. **Food Industry**: It is widely used in the drying treatment of fruit slices (such as apple slices, banana slices, strawberry slices, etc.), dehydrated vegetables (such as carrots, spinach, mushrooms, etc.), nuts and dried fruits (such as raisins, dried cranberries, etc.), and various food particles (such as pet food particles, snack food particles, etc.). It can effectively retain the nutritional components, color, and taste of the food.

2. **Pharmaceutical Industry**: It is suitable for the drying processing of traditional Chinese medicinal materials (such as ginseng, wolfberries, astragalus membranaceus, etc.), meeting the strict requirements for temperature, humidity, and hygiene conditions during the drying process of traditional Chinese medicinal materials, and ensuring the quality and curative effect of traditional Chinese medicinal materials.

3. **Chemical Industry**: It can be used for the drying of various chemical raw materials and granular chemicals, such as catalysts, pigments, resin particles, etc., helping chemical enterprises improve product quality and production efficiency.

4. **Other Industries**: It can also be applied to the drying treatment of materials with certain air permeability in industries such as biological products, feed processing, and papermaking, providing a reliable drying solution for the production in these industries. ## V. Precautions for Ordering the Belt-type Dryer

1. **Material Information**: Provide detailed information about the name, physical and chemical properties (such as density, viscosity, surface tension, pH value, etc.) of the materials to be dried, the initial solid content (or water content), and the target water content after drying, so that the manufacturer can design a suitable drying process and equipment parameters according to the material characteristics.

2. **Product Requirements**: Clearly define the mass indicators of the dried products, such as bulk density, allowable residual moisture content, particle size requirements, and the maximum temperature that can be tolerated, to ensure that the equipment can produce products that meet the quality standards.

3. **Production Scale**: Accurately inform the manufacturer of the expected production output and the working shift duration per day, so that the manufacturer can reasonably configure the model and specification of the equipment to meet the production needs and avoid resource waste or insufficient production capacity caused by an oversized or undersized equipment selection.

4. **Energy Conditions**: Provide the types of available energy resources (such as steam, electricity, gas, coal, etc.) and the corresponding energy supply parameters, such as steam quantity, power supply capacity, gas pressure, etc., so that the manufacturer can select a suitable heat source form and energy utilization scheme to ensure the normal operation of the equipment and the rational utilization of energy.

5. **Control Requirements**: Determine the control requirements for the equipment, such as whether it is necessary to automatically control parameters such as the temperature and humidity of the air inlet and outlet, and the speed of the mesh belt, and whether it is necessary to be equipped with remote monitoring and data recording functions, etc., so that the manufacturer can configure the corresponding automatic control system.

6. **Environmental Protection Requirements**: Explain the environmental protection requirements for dust collection and tail gas emissions, such as whether it is necessary to install dust collection equipment such as bag filters and cyclone separators, and the emission standards for harmful substances (such as dust, harmful gases, etc.) in the tail gas, to ensure that the equipment complies with environmental protection regulations during operation.

7. **After-sales Service**: Understand the after-sales service content provided by the manufacturer, including the service quality and response time in aspects such as equipment installation and commissioning, operation training, maintenance, and supply of vulnerable parts, to ensure that the equipment can receive timely and effective technical support and maintenance during use.