Low temperature vacuum rake dryer

The ZPG low-temperature vacuum rake dryer is a novel horizontal intermittent vacuum drying equipment. Wet materials are evaporated through conduction, and a scraper stirrer is used to continuously remove the materials on the hot surface, forming a circulating flow in the container. After the water evaporates, it is extracted by a vacuum pump.

Overview

　　Low temperature vacuum rake dryerThe heating medium can be steam, thermal oil, or hot water. The materials are divided into stainless steel and Q235 sheet metal.

Scope of application

　　Low temperature vacuum rake dryerEspecially 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 crushing. Drying of materials in industries such as medicine, food, and chemical: suitable for pulp, paste, and powder materials. Thermally sensitive materials that require low-temperature drying. Easily oxidizable, explosive, strongly irritating, and highly toxic materials. Require the recycling of materials containing organic solvents. The dried material can be in the form of slurry, paste, granular, powdery or fibrous, and has been widely used in the production process of solid alcohol sodium (potassium).

working principle

The dried object is added from the middle of the shell, and under the continuous rotation of the rake teeth, the material moves back and forth in the axial direction. The surface in contact with the inner wall of the shell is constantly updated, and is indirectly heated by steam. The uniform stirring of the rake teeth and the crushing of the crushing rod make it easier to discharge the surface moisture of the material. The vaporized moisture is discharged from the vacuum pump outlet through the dry dust collector, wet dust collector, and condenser. Suitable materials for rake dryer: materials below 100 mesh, pigments, clay like materials, soda ash detergents, alkali stone starch, dyes and pigments, clay ash, etc.

Adopting the method of simultaneous heating with interlayer and internal stirring, the heat transfer surface is large and the thermal efficiency is high. Especially suitable for drying heat sensitive materials. The dried materials can be in the form of slurry, paste, granular, powder or fiber, and have been widely used in the production process of solid alcohol sodium. Mixing is set up to create a continuous circulation of materials inside the cylinder, further improving the uniformity of material heating.

feature

1. The device has a simple structure, small footprint, easy operation, and wide applicability.

2. Low equipment failure rate and easy to achieve fully automatic control of incoming and outgoing materials.

Equipment Technical Parameters

1. Model: ZB-500;

(1) Working volume: 300L;

(2) Heating area: 6 square meters;

(3) Power: 4kw;

(4) Mixing speed: 6-30 stepless speed regulation;

(5) Design pressure of interlayer: 0.5MPa;

2. Model: ZB-750

(1) Working volume: 450L;

(2) Heating area: 7.6 square meters;

(3) Power: 5.5kw;

(4) Mixing speed: 6-30 stepless speed regulation;

(5) Design pressure of interlayer: 0.5MPa;

3. Model: ZB-1000

(1) Working volume: 600L;

(2) Heating area: 9.3 square meters;

(3) Power: 7.5kw;

(4) Mixing speed: 6-30 stepless speed regulation;

(5) Interlayer design pressure: 0.5MPa.

Precautions

1. Heating or cooling of the dryer should be carried out slowly, and users should adopt appropriate heating and cooling speeds according to the situation.

2. During the operation of the equipment, samples should be taken according to standard procedures, and after sampling, the equipment should be turned off and restarted.

3. The maximum temperature for selecting MOS2 composite base grease (ZFG-IE) for rolling bearings is 150 degrees, and it should be checked at least once a month. If the grease becomes dry, it should be replaced with new grease in a timely manner.

4. The maintenance of cylindrical gear reducers should be carried out according to their instructions.

5. After each drying of the filter inside the tank, the adsorbed powder on top should be cleaned to ensure smooth filtration.

6. The mechanical seal or packing seal between the spindle and the tank body should be checked regularly. Immediate repair or replacement of seals upon discovery of leaks.

7. The equipment should be inspected and repaired once every six months to a year during operation. During maintenance, the original assembly method and tolerance requirements should not be changed, and corresponding lubricating oil should be added according to regulations

8. Special note: The equipment must be reliably grounded from installation to use.