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High Efficiency Vacuum Dryer

The High Efficiency Vacuum Shelf Dryer ( High Vacuum Shelf Dryer ) for Heat-sensitive Materials is a new type of vacuum dryer designed and manufactured by our company to dissolve the following problems in the traditional vacuum shelf drying oven during the drying process: the large temperature difference inside the oven, the slowly drying speed, the inconsistently dried of upper and lower materials are, and easy to foam and overflow drying tray during the drying process so that extends drying time, This low temperature drying equipment is mainly designed to drying for the materials with high sugar content, low temperature, easy to overflow, easy to foam, easy to oxidize.
  • MDZ
  • 8419399090
  • SUS304/SUS316L/Titanium
  • Food/Pharmaceutical/Chemical

High Efficiency Vacuum Dryer Overview

      The drying efficiency is 200% higher than that of traditional vacuum drying machine, and the drying time is shortened greatly. More than 80% less energy consumption than the hot air drying oven. The high vacuum dryer can use steam, hot water, electricity as the heat source, and it can complete the online cleaning or soak cleaning function. It has solved the problems of vacuum equipment of high energy consumption and low efficiency and disconnection from the pharmaceutical production process for many years. At present, it is a high-efficiency and energy-saving replacement product with drying and cleaning functions.

      Due to the high viscosity, high sugar content and poor air permeability of many extract materials. the materials are paste and sticky, and the materials cannot withstand high temperatures; this type of materials cannot be dried by a spray dryer.  If it is dired by the ordinary shelf vacuum drying oven, the drying time is usually more than 20 hours. Off course, microwave vacuum dryers have become popular in China and Asia in the past few years. The microwave vacuum dryer can complete the drying of such materials by shortly time. In the process of using in pharmaceutical  and food factories, it was found that microwaves have major damage to some material components. In recent years, vacuum microwave dryers have gradually withdrawn from the market in some fields.

      In recent years, a pulsating vacuum dryer (also called a high-efficiency vacuum dryer) has been developed on the basis of pulsating sterilization equipment. The low temperature pulse vacuum dryer is a jacketed box-type device, which operates under low temperature and vacuum conditions, and the drying time is shortened from more than 20 hours in the traditional vacuum tray dryer to about 2-3 hours. This equipment has achieved a great breakthrough in drying speed, and after the materials are manually loaded, zix automatic control is set.

      It can be widely used for drying materials in various industries. This equipment is especially suitable for drying traditional Chinese medicine extracts with high sugar content, low heat sensitivity, easy overflow and easy foaming. The drying ability is very advantageous. For example: plant extracts with high sugar content, honey.

High Efficiency Vacuum Drying Oven Description

    The intelligent pulse vacuum dryer is a commonly used vacuum drying equipment with strong adaptability. It is suitable for drying small batches and multiple varieties of materials without damage or dust. It is especially suitable for drying of multi-variety and small batches of heat-sensitive drugs in pharmaceutical factories. The equipment is composed of a rectangular airtight drying box, and there is a plate drying rack composed of a heating plate layer and an integral mobile trolley. Hot water is introduced into the board layer to heat the baking pan containing the material, and it is dried by heat conduction with the board layer, and the evaporated water vapor is taken away by the vacuum system to achieve the drying effect. Therefore, our company combined experiments and made technical improvements to the traditional drying box to obtain a new type of intelligent pulse vacuum dryer. Its equipment has the following characteristics:

   1. The outside of the equipment box of the High Efficiency Vacuum Shelf Drier is equipped with ≧45% stainless steel heating jacket, hot water circulation, which increases the overall heating area of the box, can quickly increase the temperature in the box, prevent the secondary formation of condensed water, and effectively ensure that the temperature inside the box is uniform. performance and stability, and increase the drying rate.

   2. The new type of drying rack has a flat surface and automatic constant temperature, which ensures that the materials in the baking tray are heated evenly. The drying rack is composed of heating plates, pillars and imported silicone tubes, with beautiful appearance and easy maintenance.

   3. The traditional vacuum drying box is manually locked by hand wheel, while the intelligent pulse vacuum dryer is an automatic locking door, which is flexible in rotation, sturdy and durable, easy to operate and beautiful in appearance.

   4. The intelligent pulse vacuum dryer is equipped with temperature and humidity control and automatic voltage stabilization. It integrates the functions of drying and condensing solvent recovery, PLC control, and intelligent storage and formula production functions, realizing the whole process of intelligent control and high degree of automation.

   5. The intelligent pulse vacuum drying equipment adopts "high pressure hot air-vacuum pulse convection mode". The principle of vacuum drying is a high-efficiency low-temperature drying and sterilization method. The equipment can use steam, circulating superheated water, and electric heating as the heat source. At the same time, it can use saturated steam circulation sterilization, ozone sterilization and other functions, and can realize online cleaning or soaking cleaning functions. Its drying effect is very good. With drying, sterilization, cleaning and other multi-function all-in-one machine, advanced, high efficiency (shortening drying time), high energy saving, full-featured, the same output requires less equipment, saving 40-60% of the floor space, currently the most ideal, the most popular drying equipment.

   In summary, the intelligent pulse vacuum dryer has a reasonable structure, simple operation and convenient cleaning. It is a new type of vacuum drying machine that meets the requirements of GMP.

pulse vacuum dryer

Pulse Vacuum Dryer

pluse dryer

Interior of Dryer 


    The intermittent supplemental air high-efficiency vacuum dryer includes the following components: jacketed box, multi-function frame, heat layer, heavy-duty tray, vacuum system, chiller, cleaning system, buffer tank, etc.

The intermittent supplemental air vacuum dryer have heat function of the inner layer board and cabinet jacket under the vacuum condition to drying the materials. The vacuum pump is used for suction and dehumidification to make the working chamber form a vacuum state and reduce the boiling point of water. It can obtain a high drying rate at a low temperature, and the heat is fully utilized. There is no impurity in the drying process. The equipment is static vacuum drying, so it will not cause damage to the shape of the dried material. After the material is foamed when it is drying process, it will quickly break through the injection clean air, which meets the new GMP requirements. Adopt high-performance PLC to detect and control the whole process, the working pressure and temperature are automatically adjusted throughout, and the work report is output in real time for archiving for reference. the max vacuum of the high vacuum dryer can reach -0.097Mpa.

pulse vacuum drier

Vacuum system

high vacuum dryer

Control valve

High Vacuum Shelf Dryer Design Aim

    With the changes in market demand for vacuum drying equipment, the regulation of drug supervision is becoming more and more strict, and the requirements for automation, energy-saving equipment and the degree of individualization of production equipment are getting higher and higher.

Therefore, Hywell Machinery accurately reflects the needs of market customers into the design process of intelligent vacuum drying equipment, and presents energy saving, environmental protection, high efficiency, automation and intelligence of drying process and equipment in a new generation.

High Vacuum Shelf Drying Oven Performance Characteristics

   1. The intermittent supplemental air vacuum drier solve the bottleneck of drying efficiency. the high efficiency vacuum equipment have high drying efficiency, this high speed vacuum dryer technology improves the efficiency by 5 to 10 times compared with the traditional vacuum dryer;

   2. The low temperature high efficiency dryer solve the problem of conformity between the actual production of materials and the drying process. the equipment production process is stable and controllable;

   3.  The low temperature pulse vacuum drier solve the problem of difficult cleaning. with automatic water inlet soaking and cleaning function, mobile drying inner car design, online cleaning device, more convenient to clean, peripheral feeding car;

   4. The high vacuum state dryer solve the problem of drying materials for small and medium batches, and multiple varieties of drying, and the actual production is more flexible;

   5. The high efficiency vacuum drier solve the problem of high energy consumption of pharmaceutical equipment. The drying production cost of this high efficiency dryer is reduced by more than 50% compared with traditional equipment.

High Speed Vacuum Dryer Process Flow

pluse vacuum oven

High Vacuum Drying Oven Specifications


Effective volume

Inner size(mm)

External size

Qty of layer

Qty of tray

  ( ºC )

Steam pressure
  ( Mpa )







Room Temp-100








Room Temp-100








Room Temp-100








Room Temp-100


1. Accept non-standard customized   vacuum drying oven

1.Hywell machinery reserves the   right to the design without notice

2.All specifications are as accurate as is reasonably possible, but they   are not binding.

Heating Method of Pulse Vacuum Dryer

  For the heating method of the pulse vacuum dryer, it can use the steam or hot water or heat transfer oil as heat source. However, the above heat sources cannot be provided by end user. Hywell machine can provide electric heating heat transfer oil furnace or electric heating hot water tank. Specific can be designed according to customers.

Pulse Vacuum Drying Oven Construction Material

   Hywell Machinery are able to offer our MZ series pulse vacuum drying oven with contact part to be built in SS304, SS316L, Titanium, Duplex stainless steel, etc. Electrical parts of control system of the vacuum drying machine can be adapted to the customer’s needs.

shelf vacuum dryer

Plate rack

tray of vacuum dryer


How do the pulse vacuum dryer oven works

    First set the temperature adapted to the material characteristics, the whole system is fully automatically controlled, when the vacuum in the box of pulse vacuum drying machine reaches the saturated evaporation state of water or solvent, the water will be evaporated at a low temperature and high efficiency. The reasonable heating method adopts the plate heating method. , increase the effective heat exchange area, and adopt the high-pressure hot air-vacuum convection method to prevent the loss of heat energy in the box, and at the same time, the water vapor in the box is quickly vacuumed away, and it plays the role of vacuum drying and replacement over and over again, which greatly improves drying. efficiency!

High Vacuum Shelf Oven Advantages

    Hywell machinery MZ series high efficiency vacuum shelf oven had the following advantages over conventional solutions.

  1. Short drying time and low energy consumption;

  2. The material is evenly dried;

  3. The temperature of heat-sensitive materials can be selectively heated and dried;

  4.  Large heat exchange area and high utilization rate of heat energy;

  5.  Drying in high vacuum and low temperature state, less loss of active ingredients, and good quality of dried products;

   6.  After drying by the pulse shelf vacuum dryer, the product is crunchy, easy to crush, has good instant solubility and high yield;

   7. Good temperature control performance by the high vacuum shelf dryer, no carbonization of dry products;

   8. The formula process is automatically controlled throughout the process, and the product quality is stable;

   9. The high-pressure hot air pulse function prevents the loss of heat energy in the box, effectively reduces energy consumption, dries the product evenly, and has no overflow tray

   10. The operation and cleaning are more scientific and convenient.

   11. Cold water and hot water filtration and circulation system, which greatly saves production water and reduces production costs;

   12. Condenser on-line cleaning management process to prevent the accumulation of scale and sticky walls, improve the vacuum degree, and ensure the stability of equipment production

   13.  Make a suitable vacuum system according to the composition of the dry material to improve the production stability and prolong the service life of the equipment

   14. The plate-layer of the high efficiency vacuum shelf oven connection adopts the imported silicone tube without locking structure connection, which avoids the dead angle of sanitation, and the maintenance is convenient and quick.

   15.  50% moisture materials can be dried in 2-3 hours when the drying temperature is 50-70 degrees by this pulse vacuum dryer machine, and get the crisp dried materials.

   16.  Dry Temperature Sensitive Products - Because all liquids vaporize at lower temperature at reduced pressures, it is possible to vaporize the liquids at very low temperatures.

   17. Reduced Energy – Since the evaporation of the liquid under high vacuum occurs at a much reduce temperature, the temperature differential is increased without raising the temperature.

  18. Single Enclosed Environment – Active pharmaceutical ingredients, drugs and toxic chemicals are easily isolated in a vacuum dryer. The closed system also assures the maximum collection of solvents is achieved, protecting operators and the environment.

  19.  Avoid Oxidation – Vacuum Tray Dryer is ideal for avoiding oxidation of chemical and with the addition of an inert gas purge, an oxygen free environment can be maintained.

  20. The heat source for evaporation may be low pressure steam or surplus heat steam. but the tray model vacuum dryer also can use hot water or thermal oil to as heat source. If client have not heat source. Hywell machinery can design and supply the electrical heating thermal oil or hot water to supply heat source for the MZ Series Vacuum Drying Machine.

   21.  The MZ series high vacuum dryer belongs to static vacuum dryer. The materials load inside the tray ,So the shape of raw material to be dried should not be destroyed.

Pulse Tray Vacuum Drier Application

    Pulse Tray vacuum drier is suitable for drying heat sensitive raw materials that can decompose or polymerize or deteriorate at high temperature. Pulse Tray vacuum dryer is widely used in pharmaceutical, chemical, foodstuff and electronic industries. Particularly it is suitable for row materials that have the follow requirements:

  1.Themal sensitive raw materials that cannot be dried at high temperature.

  2.Raw materials that is easy to oxidize and dangerous.

  3.Raw materials that solvent and toxic gases are needed to recover.

  4.Raw materials that have special requirement for crystal shape.

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