Vacuum belt dryer

A vacuum belt dryer is a continuous feeding and discharging vacuum drying equipment. Liquid raw materials are transported to the dryer through a feeding pump and evenly distributed on a conveyor belt through a fabric feeder. The boiling point temperature of the materials is reduced by high vacuum, and the moisture of the liquid raw materials evaporates at low temperatures. The conveyor belt runs at a constant speed on the heating plate, and the heat source inside the heating plate can be steam, hot water, or thermal oil. Through the operation of the conveyor belt, the heating temperature is adjusted from high to low from the evaporation and drying at the front end to the cooling discharge at the back end. The specific vacuum crushing device is equipped at the discharge end to achieve different particle sizes of finished products. The dried powder can be automatically packaged or enter the subsequent process section.

The birth of the vacuum belt dryer has transformed the vacuum drying from the traditional static drying to the vacuum dynamic drying, from the traditional 8-20 hour drying to the 20-80 minute drying, which has reached the goal of adjusting different drying temperatures according to different materials, and solved the problem of high spray drying temperature and easy denaturation of the traditional oven for a long time. The preservation of the color, solubility, and physical properties of the dried product cannot be compared to other equipment.

Scope of Application

Low temperature vacuum liquid multi-layer belt dryer, a vacuum belt drying equipment that integrates drying and crushing. It is suitable for drying various sugars such as maltose, malt cream, sucrose, beet sugar, dextrin, cereal, corn syrup, Rice noodles, honey, coffee and other substances with high sugar content. This machine solves a major problem for the high concentration and high viscosity of traditional Chinese medicine extract for alcohol extraction.

This machine is not only suitable for sugar foods and traditional Chinese medicine extracts, but also for low-temperature drying of various liquid paste like raw materials such as Chinese and Western medicines, polysaccharide drugs, biotechnology, chemical raw materials, food additives, etc., especially for drying products with high viscosity, easy agglomeration, thermoplastics, and heat sensitivity;

Equipment advantages

• Complete process automation, piping, and continuity; • Realize continuous feeding and discharging under vacuum conditions;

Drying, crushing, and granulation are completed under vacuum conditions; • Operation cost is 1/3 of vacuum oven and spray drying, and 1/6 of freeze drying;

Up to two operators greatly reduce labor costs; The drying temperature (20 ℃~150 ℃) and drying time (20~80 minutes) can be adjusted according to the material process requirements;

• Heat sensitive materials are invariant and free from bacterial contamination; Starting from 20 to 80 minutes, the dry powder will be continuously discharged, with a dry powder output rate of 99%;

• Able to solve the drying of various liquid and slurry raw materials with high viscosity and difficulty in drying; Online automatic cleaning, in compliance with GMP requirements.

Technical Specifications

Similar comparison

Components of vacuum belt dryer

The vacuum belt dryer consists of nine major systems: vacuum system, automatic correction system, heating system, feeding system, fabric system, discharging system, cooling system, CIP automatic cleaning system, PLC automatic control system, etc.

Vacuum system: The drying equipment barrel forms its own vacuum, which is controlled by a Roots vacuum pump. Drying in a vacuum drying bucket greatly reduces the temperature required for material moisture evaporation, allowing the material to quickly evaporate and dry at low temperatures, which is beneficial for maintaining the color and composition of the material.

Automatic correction system: The conveyor belt may deviate during transportation, and the automatic correction system can help the conveyor belt automatically return to its original position, prevent damage to the conveyor belt, and ensure that materials are dried in the normal drying area. Our company's conveyor belt drive adopts a variable frequency reduction motor for control. The variable frequency reduction motor can control and adjust the running speed of the conveyor belt, thereby controlling the heating time of materials and meeting the different needs of users.

Heating system: using baffle heating to ensure uniform heating of the heating plate, preventing local overheating or insufficient heating, which may affect the drying of the material. The heating source can use steam heating and be adjusted by a water circulation heating controller to achieve automatic temperature control, with temperature control accuracy within ± 3 ℃.

Feeding system: Based on user requirements and the different characteristics of materials, we use different feeding pumps for feeding. The variable frequency feeding motor can adjust the feeding size and control the feeding speed of materials.

Fabric system: Adopting a swing rod structure for fabric, the driving motor is driven by a variable frequency motor, which is conducive to the uniform placement of materials on the drying conveyor belt and ensures uniform heating of the materials.

Discharge system: Spiral+crushing or coarse crushing can be used for discharge processing, and multiple discharge methods meet the different needs of customers.

Cooling system: The cooling system provides cooling water for the vacuum system to ensure its operational stability. Protect important parts of the pump body to prevent the machine from overheating and working.

CPI automatic cleaning system: The CPI automatic cleaning system can efficiently clean the barrel body, providing comprehensive and no dead corners for cleaning. Ensure that the equipment is clean and does not affect the next use of the equipment.

PLC automatic control system: Adopting S7-300 high-end PLC control system for equipment control to improve control stability. Internally, Siemens high-end frequency converters are used to improve product quality and stability. Temperature and pressure are controlled using PID controllers, and hardware is used instead of software to improve the stability of the control