How much does Jiangsu belt dryer cost

DW belt dryerIt is particularly suitable for dehydrated vegetables, traditional Chinese medicine decoction pieces, and other materials with high moisture content and heat sensitivity. It has the advantages of high drying rate, high evaporation intensity, and good product quality. Belt dryers are widely used in industry, mainly for drying small pieces of materials and fibrous materials. In short, materials dried with a belt dryer must have a certain shape and still maintain a certain shape after drying.

DW belt dryerThe material is evenly spread on the mesh belt by the feeder, and the mesh belt is made of 12-60 mesh stainless steel wire mesh. Dragged by the transmission device to move inside the dryer. The dryer consists of several units, each with independent hot air circulation. Some of the exhaust gas is discharged by a specialized dehumidification fan, and the exhaust gas is controlled by a regulating valve. The hot air passes through the materials laid on the mesh belt from bottom to top or from top to bottom, heating and drying while removing moisture. The mesh belt moves slowly, and the running speed can be freely adjusted according to the material temperature. The dried finished product continuously falls into the feeder. The upper and lower loop units can be flexibly equipped according to user needs, and the number of units can be selected as needed.

The materials in the hopper are evenly spread on the mesh belt by the feeder. The mesh belt is generally made of 12-60 mesh stainless steel wire mesh and is dragged by the transmission device to move inside the dryer. The dryer consists of several units, with each unit having independent hot air circulation. Some of the exhaust gas is discharged by a dedicated dehumidification fan 4, and the amount of exhaust gas emitted by each unit is controlled by a regulating valve. In the upper circulation unit, the air from the circulating fan 5 enters the lower chamber of the unit through the side air duct. The airflow is heated by the heater 7 and distributed by the distributor 6, forming a jet flow that blows towards the mesh belt, passes through the material, and enters the upper chamber. The drying process is the process of hot air passing through the material layer, completing the transfer of heat and mass. The upper chamber is connected to the inlet of the fan through an air duct. Most of the gas is circulated, and a portion of the gas with lower temperature and higher moisture content is discharged as exhaust gas through the dehumidification pipe, regulating valve, and dehumidification fan. In the lower circulation unit, the air from the circulating fan enters the upper chamber, is heated by the heat exchanger, passes through the material layer, and enters the lower chamber. The lower chamber is connected to the fan through side air ducts and return air ducts, and most of the gas circulates while a portion is discharged. The upper and lower loop units can be flexibly equipped according to user needs, and the number of units can also be selected as needed.

Used for dehydrating vegetables, generally three devices are connected in series to form the initial drying section, middle section, and final drying section. In the initial drying stage, due to the high moisture content of the material. Due to poor breathability, a smaller paving thickness, faster operating speed, and higher drying temperature are used. In the initial drying stage, the temperature of the drying gas can reach over 120oC. The retention time of materials in the final drying stage is 3-6 times that of the initial drying stage, and the paving thickness is 2-4 times that of the initial drying stage. For the requirement of material temperature not exceeding 60oC, dry gas at around 80oC can be used. Using a multi-stage combination can better utilize the performance of the belt dryer and achieve more uniform drying.

Structural form:

(1) Single stage belt dryer: The dried material is evenly distributed onto the conveyor belt through the feeding device at the feeding end. Conveyor belts are usually made of perforated stainless steel sheets, driven by motors through gearboxes, and can be adjusted in speed. The interior of the drying machine is usually divided into several units for independent control of operating parameters and optimization of operations. There is an isolation section between the drying sections, where there is no circulation of drying medium.

(2) Multi stage belt dryer: Multi stage belt dryer 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.

(3) Multi layer belt dryer: Multi layer belt dryer is commonly used in situations where the drying speed requirements are low, the drying time is long, and the process operating conditions can be maintained constant throughout the entire drying process. Set up partitions between layers to organize the directional flow of drying medium, ensuring uniform drying of materials. Multi layer belt dryer takes up less space, has a simple structure, and is widely used for drying grain materials. However, due to the need for multiple loading and unloading during operation, it is not suitable for dry and easily adhesive conveyor belts and materials that are not allowed to break.

(4) Impact belt dryer: The impact belt dryer is suitable for drying surface coatings of fabrics, tobacco leaves, substrates, and other thin sheet materials. The impact belt conveyor usually consists of two conveyor belts. The impact belt conveyor can be divided into unit segments for independent control. After the drying medium is humidified, some of it is discharged, while the other part is returned and mixed with fresh drying medium before circulating.

selection

Belt dryers have a wide range of applications and have found their place in fields such as pharmaceuticals, food, biology, and chemical engineering. But the selection criteria vary in each field, because the requirements and parameters of dry materials in different fields have significant differences. For example, in the pharmaceutical industry (especially traditional Chinese medicine), the viscosity of the extract is generally high, and the drying temperature requirements are strict. The melting point control should be precise (especially for polysaccharide materials), and the vacuum degree control range should meet the heating temperature requirements of different stages and have online automatic adjustment function, etc. In addition, the detection system should be as comprehensive as possible to comply with pharmaceutical GMP standards. For the food industry, the solid content of its material extract is generally relatively high (over 65%), and the requirements for production volume, product specific volume, appearance, etc. are key factors in the selection criteria of vacuum belt dryers. There are two elements that cannot be ignored in the selection process of food grade vacuum belt dryers: one is the consumption ratio of unit energy consumption, and the other is supporting equipment such as pre conveying of raw materials, fine crushing of dried products, and packaging. As for the vacuum belt dryer used in biology and chemical industry, due to the different forms of products, the selection criteria are extremely complex, so extra caution is needed.

The first step in choosing a vacuum belt dryer is to conduct a small sample test on the dried material, which is very important. Therefore, for equipment suppliers, whether they have material testing equipment and experienced sample personnel is the most direct way for customers to measure the manufacturer's true capabilities. Qualified manufacturers of vacuum belt dryers are generally able to provide customers with a technical parameter report in the shortest possible time after material testing, including actual material evaporation, dynamic drying vacuum degree, distribution of drying temperature, feeding amount, actual drying time, actual product production capacity, unit energy consumption ratio, etc. This facilitates customers to choose equipment models and specifications that can meet production requirements.

The second step in choosing a vacuum belt dryer is to comprehensively evaluate the manufacturer's design level and manufacturing capabilities. Manufacturers generally provide a preliminary technical design plan based on the material test report and the customer's production indicators and operating conditions, and provide a detailed explanation of the design reasons in the plan. The technical design scheme is an extremely important component in evaluating the manufacturing capability of manufacturers in vacuum belt dryers, especially the manufacturer's design description of key equipment technologies such as vacuum system design, heating system design, correction system design, cleaning system design, and feeding and discharging system design. Another aspect of manufacturing capability is to examine the actual usage of the manufacturer's users. Customers can request on-site inspections based on the user list provided by the manufacturer. If the manufacturer has sufficient strength, they generally will not refuse this reasonable request from customers, and some can even provide multiple visiting targets for customers to choose from. However, companies with limited manufacturing capabilities or lower technological levels generally find it difficult to achieve this.

The third step in choosing a vacuum belt dryer is to assess the manufacturer's actual processing capacity and production scale. There are no more than three domestic enterprises with serial design and production capabilities, especially manufacturers with an annual output of 10 or more vacuum belt dryers (especially large or ultra large equipment with more than 6 drying beds), which are estimated to be only 1-2. Therefore, the vast majority of domestic manufacturers find it difficult to standardize the processing of components for vacuum belt dryers. There are significant issues with the maintenance and upkeep of products provided to customers, as well as the exchange of components and accessories, which often directly affect users' production efficiency. Additionally, due to a lack of practical experience, it is impossible to consider the mechanical structure, configuration rationality, manufacturing accuracy requirements, and other aspects of the equipment in a comprehensive manner. However, due to its large size, multiple auxiliary equipment, high configuration requirements, and complex intermediate links, it is not easy to maintain the long-term stability of the operation of the vacuum belt dryer. The price of this equipment is also relatively expensive, and users generally value its drying ability and technological advantages and invest heavily in purchasing it, so they hope to recover costs as soon as possible to improve the economic benefits of the enterprise. Therefore, when purchasing equipment, it is necessary to choose a manufacturer with scale, practical design and manufacturing experience, and a reliable after-sales service guarantee system in order to feel at ease. Of course, the vacuum belt dryer provided by such a manufacturer is generally slightly more expensive, but for users, there is a sense of security in use. Customers must not be tempted by short-term low prices and may affect the overall situation.
Scope of application:
Used for drying sheet, strip, and granular materials with good breathability, especially suitable for dehydrated vegetables, traditional Chinese medicine decoction pieces, and other materials with high moisture content and material temperature not allowed to be high; This series of dryers has the advantages of fast drying speed, high evaporation intensity, and good product quality. For the paste like material of dehydrated filter cake, it can also be dried after granulation or shaping into a rod shape.

Features:

(1) The vibration and impact of the material on the belt dryer are slight, and the material particles are not easy to pulverize and break, so it is also suitable for drying certain materials that do not allow fragmentation.

(2) The belt dryer not only provides drying for materials, but sometimes can also perform baking, roasting, or curing operations on materials.

(3) The structure of the belt dryer is not complicated, easy to install, and can operate for a long time. In case of malfunction, it can enter the interior of the box for maintenance, making it easy to repair.

(4) It can adjust the air volume, heating temperature, material residence time, and feeding speed to achieve ****** drying effect.

(5) The equipment configuration is flexible and can use mesh belt flushing system and material cooling system.

(6) Most of the air is recycled and highly energy-efficient.

(7) The air distribution device ensures a more uniform distribution of hot air and guarantees consistency in product quality.

(8) The heat source can be steam, thermal oil, electricity, or coal-fired (oil) hot blast stove

Technical Specifications: