Belt drier, also known as mesh belt dryer, belt drying oven and flap dryer, is a continuous drying equipment for batch production. The following is a detailed introduction to belt drier:

First, the working principle

The core principle of belt drier is to use hot air to pass through the material layer, so as to complete the transfer of heat and quality, and thus achieve the drying effect. Specifically, the materials in the hopper are evenly spread on the mesh belt through the feeder, and the mesh belt is driven by the transmission device and moves in the dryer. After being heated by the heater, the hot air is blown to the mesh belt in the form of jet, which passes through the material layer to complete the drying process. Part of the tail gas is discharged by a special dehumidifying fan to form gas circulation.

Second, the structure composition

Belt drier is mainly composed of feeding module, drying chamber, conveyor belt, heating module, dehumidifying module and discharging module. Each module undertakes its own special function and works together to achieve the drying purpose.

Feeding module: responsible for laying materials evenly on the conveyor belt.

Drying room: built-in heating equipment, using hot air or steam to apply heat to materials to promote water evaporation.

Conveyor belt: generally made of perforated stainless steel sheet or stainless steel wire mesh to ensure the uniform distribution of materials, and driven by a motor through a gearbox, which can adjust the speed.

Heating module: provides the heat needed for drying.

Moisture removal module: dedicated to the discharge of water vapor in the drying process to ensure the drying quality.

Discharge module: the dried finished product continuously falls into the receiver.

Third, the type

There are many types of belt drier to meet the needs of different industries and production:

Single-stage belt drier: The dried materials are evenly distributed on the conveyor belt from the feeding end through the feeding device. The drying cabinet is usually divided into several units in order to control the operation parameters independently and optimize the operation.

Multi-stage belt drier: Multi-stage belt drying is essentially composed of several single-stage belt dryers connected in series, and its operating principle is the same as that of single-stage belt dryers.

Multi-layer belt drier: It is often used in situations where the drying speed is low and the drying time is long, and the process operation conditions can be kept constant during the whole drying process. Partition boards are arranged between layers to organize the directional flow of drying media and make the materials dry evenly. Multi-layer belt dryer occupies less land and has a simple structure, but it is not suitable for drying conveyor belts that are easy to stick to and materials that are not allowed to be broken.

Impact belt drier: It is suitable for drying the surface coating of fabrics, tobacco leaves, substrates and other flaky materials. It usually consists of two conveyor belts, which can be divided into unit sections for independent control.

Fourth, the characteristics

High drying rate and high evaporation intensity, which can significantly improve production efficiency.

The product quality is stable, and it is suitable for various materials, such as sheet, strip and granular materials with good air permeability.

Simple structure, convenient installation, long-term operation and convenient maintenance.

The drying process is continuous, which simplifies the manual operation steps.

V. Scope of application

Belt drier is widely used in many fields, including but not limited to:

Food processing: used for dehydration of vegetables, fruits, grains and meat products, effectively removing water and maintaining the nutrients and flavor of food.

Chemical production: Many chemical products need to go through dehydration to remove excess water or solvent. belt drier has become the preferred equipment for production because of its high efficiency and continuous operation.

Pharmaceutical industry: it is used for drying Chinese herbal pieces, catalysts and other materials, and the temperature of the materials is strictly controlled to meet the special requirements of the pharmaceutical industry.

VI. Selection and purchase suggestions

When choosing belt drier, you need to consider the following factors:

Material characteristics: such as water content, air permeability, shape and size of the material, these factors will directly affect the selection and drying effect of the dryer.

Production demand: such as output, drying time, drying temperature, etc., these factors will determine the specifications and configuration of the dryer.

Equipment quality: choose manufacturers with high-quality materials, exquisite craftsmanship and good reputation to ensure the stability and durability of the equipment.

After-sales service: select the manufacturer that provides perfect after-sales service to ensure timely technical support and maintenance services during use.

When purchasing, it is recommended to fully communicate with the manufacturer to clarify their own needs and expectations, so that the manufacturer can provide appropriate technical solutions and equipment selection suggestions. At the same time, we can refer to the evaluation and experience of other users in order to make more informed purchase decisions.