1、 Equipment Overview
The fully open dynamic vacuum dryer is a gap operated vacuum dryer, generally composed of a shell with steam or hot water jacket, a rotating rake tooth device inside the shell, a vacuum pump, a condenser, a dust collector, etc. The rake teeth device usually rotates once every 5-15 minutes to ensure even mixing of the material. It is composed of rake teeth welded at the same angle on the rotating shaft. When the rake teeth rotate forward, it can make the material move in one direction, and when the rake teeth rotate backward, it can make the material move in the opposite direction. In this way, the material is evenly stirred and does not overheat when it comes into contact with the inner wall of the shell, increasing the surface area and enhancing the vaporization effect. When assembling the rake teeth, there is a 90 degree difference between adjacent rake teeth. The rake teeth in the middle of the dryer are blade shaped, and the rake teeth at the end are shaped differently to fit the inner wall surface of the cover.

2、 Working principle
The dried material is added from above the container, and under the continuous stirring of the rotating blades, the surface of the material constantly updates when it comes into contact with the wall. The dried material is indirectly heated by a heat source (hot water), and the surface moisture of the material vaporizes. The vaporized moisture is promptly discharged by a vacuum pump. Due to the high vacuum degree, the surface water vapor pressure of the dried material is much higher than the water vapor pressure in the evaporation space inside the dryer. Thereby intensifying the movement of water molecules in the dried material, which is conducive to the discharge of internal and surface moisture of the dried material, achieving the goal of accelerating the drying speed.
According to the different properties of materials and process requirements, the machine needs to be equipped with a vacuum pump, heat source, condenser, storage tank, and other components to form a drying unit for operation. At the same time, the machine can also be used for mixed heating reactions of solid and liquid materials, as well as mixed heating of solid materials.
Application scope: Especially suitable for drying heat sensitive materials, materials that are prone to oxidation at high temperatures, materials that are prone to hardening during drying, and materials that require recovery of steam emitted during drying. After drying, the material is in powder form, so it is more suitable for finished products in powder form. After drying, it can be directly packaged without the need for powder. The rake type vacuum dryer can dry materials in slurry, paste, granular, powdery or fibrous forms, and the moisture content of the dried materials can reach 1% or even lower.

3、 Characteristics
1. Strong applicability and fast drying speed. Due to the use of jacket, end cover, shaft, and rake bar heating and high vacuum exhaust, the fully open rake dryer is suitable for almost all materials of different properties and states, especially for explosive and flammable materials.
2. The product has high quality and low energy consumption. During the drying process, the blade rotates intermittently in both forward and reverse directions, and the dried material is stirred evenly.
3. Easy to operate, recyclable volatile gases, reducing environmental pollution.
4. The rake shaft adopts a special cantilever design with internal heating, and one side of the cylinder adopts a hinged quick opening door for easy cleaning of the equipment. The hinged head is fixed with a quick opening.
5. Humanized design of the inlet and outlet bodies, with a quick release flange for quick and convenient loading. The discharge system is installed on the quick opening door and uses a piston type discharge valve for easy discharge.
6. The cylinder body is precision machined to ensure the roundness of the cylinder body and the clearance between the rake teeth and the cylinder body.
7. Equipped with a heated vacuum stainless steel sintered mesh or filter bag suction hood dust collector installed at the top.

4、 Model Description
Example: KZPG-500 type
K-------------- Fully open type
Z------------- Rake toothed
P ------------ Vacuum type
G - Dry type
500-------- Cylinder volume
5、 Technical parameters(Taking the material density of 0.6 as an example, the power used varies according to the specific gravity of the material)

6、 Electrical Instructions and Safety Rules（Electrical appliances should be provided by the user themselves）
1. Connect the power supply to the electrical cabinet, operate at zero load, check if all indicator lights are normal, if all contactors are sensitive, and if the delay time of the time relay is consistent (whether the forward and reverse time are consistent, and whether the commutation gap is consistent).
2. The grounding wire connects the entire machine to ensure good contact.
3. The motor, heat source, and vacuum pump lines can be connected to the electrical cabinet for operation. If necessary, attention should be paid to explosion-proof and explosion-proof treatment.
safety rules

1.2warn

1.2.1 It is prohibited to open the safety cover door while working.
1.2.2 When powered on, it is strictly prohibited to disassemble electrical components to avoid electric shock.
1.2.3 When repairing or maintaining the machine, the power should be cut off in advance.
1.2.4 Untrained personnel are not allowed to operate the machine. Before operation, carefully read this manual.

1.3special note

1.3.1 This device uses an AC power supply of 380V 50HZ and must have a good and reliable grounding.
1.3.2 Please read the user manual carefully.
Once the equipment is put into use, it must be maintained on time according to the user manual.
1.3.4 Correctly connect the power supply, and the power supply voltage should meet the requirements of this equipment. If the power supply does not meet the requirements, the equipment will not operate normally, and in severe cases, it will damage the equipment and cause personal injury.
1.3.5 In order to ensure personal safety, protective grounding wires should be connected to the equipment according to relevant regulations. Without permission, do not change the electrical wiring or the installation position of cables and wires, otherwise it may cause electric shock danger or the equipment cannot operate normally Do not easily modify parameter values, otherwise it may cause abnormal operation or potential danger of the equipment.
During the operation and debugging of equipment, it is necessary to strictly follow the operating requirements to prevent personal injury.
When repairing equipment, be sure to disconnect the power supply before proceeding with the repair, and pay attention to keeping the motor in a stopped state to avoid personal and equipment damage.
Personnel without technical training are not allowed to operate the equipment in any way, and operators should pay attention to the safety of others.
1.3.9 Any personnel operating this machine must have a deep understanding of the content of the "Safety Rules" in this manual and strictly abide by the provisions of this content. Otherwise, they shall be responsible for all consequences caused.
7、 Installation and Debugging

1. Cleaning tools: brush (without shedding hair), cloth (without shedding fibers), vacuum cleaner, water bucket, hose.
2. Cleaning agent: dishwashing detergent. Disinfectant: 75% alcohol.
3. Preparation of cleaning agent: Add an appropriate amount of detergent and drinking water to the cleaning tank, stir thoroughly and evenly, and set aside for later use.
4. Cleaning method:
4.1 Cleaning between batches of the same variety and specification:
4.1.1 Open the cylinder door
4.1.2 Use a vacuum cleaner to remove the powder from the inner wall surface of the bucket.
4.1.3 Use a hose connected to tap water to rinse the inner wall, flat cover, and clamp of the mixing tank. While rinsing with water, wipe with a cloth until there are no drug residues visible to the naked eye.
4.1.4 Rinse the inner wall, flat cover, and clamp of the bucket with purified water three times, add water to the bucket, cover the flat cover, and tighten the clamp (pay attention to sealing).
4.1.5 Wipe the shaft with a damp cloth dipped in purified water.
4.1.6 Rinse with purified water and wipe dry with a clean cloth; Open the discharge port and dry the inner wall with a clean cloth.
4.1.7 After wiping clean, let the mixture dry naturally. If necessary, use gauze dipped in 75% alcohol to wipe it thoroughly.
4.2 Cleaning of the same variety but different specifications or exchanged varieties.
4.2.1 Use a cloth dipped in cleaning agent to wipe the outside of the mixing cylinder, the shaking wall, and the body, paying special attention to cleaning the connecting parts, gaps, sealing rings, and other parts of the shaking wall.
4.2.2 Rinse with water and rinse the cleaning agent, then rinse three times with purified water. Wipe dry with a clean cloth, and if necessary, use gauze dipped in 75% alcohol to wipe thoroughly.
4.2.3 Wipe the inner wall with a clean cloth, then use gauze dipped in 75% alcohol to wipe it once, let it dry naturally, and set aside for later use.
5. Cleaning cycle:
5.1 Cleaning should be carried out between different batches of the same variety.
5.2 Different varieties and batches should be cleaned.
5.3 If the same variety and batch have been continuously produced for 16 hours, they should be cleaned.
5.4 Cleaning should be carried out promptly after production is completed.
If production has not been carried out for 3 consecutive days, cleaning should be carried out before resuming production.
6. Fill in the cleaning record, wait for the workshop director to inspect and confirm with the inspector, and then hang the "Cleaned" sign.
7. Cleaning and storage of cleaning tools.
Thoroughly clean the cleaning tools used with cleaning agents, rinse them with water, dry or air dry them in the cleaning tool room, and store them in the designated location.
10、 Common faults

Note: If the heat source is thermal oil, please contact our company.