PGC series disc continuous dryer

Overview

Disc continuous dryer is an efficient conductive continuous drying equipment. Its unique structure and working principle determine that it has the characteristics of high thermal efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, and good operating environment. It is widely used in drying operations in industries such as chemical, pharmaceutical, pesticide, food, feed, and agricultural and sideline product processing. Highly praised in practical applications across various industries. We currently produce three types of products: atmospheric pressure, sealed, and vacuum, with four specifications of 1200, 1500, 2200, and 3000. A (carbon steel), B (stainless steel for contact materials), and C (stainless steel for steam pipelines, main shafts, and supports, and stainless steel for cylinder and top cover lining) are available. Three types of materials, with a drying area of 4-180m2, and can provide various supporting auxiliary equipment.

Principle

The wet material is continuously added to the first layer of drying disc on the upper part of the dryer by the feeder, and the rake arm with rake blades rotates to make the rake arm rotate and make the rake blades continuously flip the material. The material flows along an exponential spiral over the surface of the drying disc, and the material on the small drying disc is transferred to the outer edge, where it falls onto the outer edge of the large drying disc below. The material moves inward on the large drying disc and falls into the next layer of small drying disc from the middle feeding port. The drying plates of different sizes are arranged alternately up and down, allowing the material to continuously pass through the entire dryer. Heating medium is introduced into the jacket disc, including saturated steam, hot water, and thermal oil. The heating medium enters from one end of the drying disc and exits from the other end. The dried material falls from the second layer of the drying tray to the bottom of the shell, and is then transferred by the rake blades to the discharge port for discharge. Moisture escapes from the material and is discharged through the dehumidification port located on the top cover. The moisture in the vacuum disc dryer is extracted through the vacuum pump port located on the top cover. Dry materials discharged from the bottom layer can be directly packaged. By adding auxiliary equipment such as fin heaters, solvent recovery condensers, bag filters, dry material mixing mechanisms, and induced draft fans, the production capacity of drying can be improved. Drying paste like and heat sensitive materials can facilitate solvent recovery and enable pyrolysis and reaction operations.

characteristics

（1） Low energy consumption
1. The material layer is very thin, the spindle speed is low, and the material conveying system requires less power and consumes less electricity.
2. Drying with conductive heat results in high thermal efficiency and low energy consumption.

（2） Easy regulation and strong applicability
1. By adjusting the thickness of the material layer, spindle speed, number of rake arms, rake blade type and size, the drying process can be optimized.
2. Each layer of the drying tray can be separately filled with hot or cold medium to heat or cool the material, and the temperature control of the material is accurate and easy.
3. The residence time of materials can be adjusted.
4. The material flow is single, with no backmixing phenomenon, uniform drying, stable quality, and no need for further mixing.

（3） Simple and easy to operate
1. The operation of driving and parking the dryer is very simple.
2. After stopping the feeding, the rake blades can quickly empty the material in the dryer after conveying the material.
3. Through the special large-sized inspection door mirror, the equipment can be carefully cleaned and observed inside.

（4） Good operating environment, recyclable solvents, and dust emissions meet requirements
1. Atmospheric pressure type: Due to the low airflow velocity and low humidity distribution inside the equipment, it is difficult for dust to float to the top of the equipment. Therefore, the exhaust gas discharged from the top humidity outlet contains almost no dust.
2. Sealed type: equipped with a solvent recovery device, which can easily recover organic solvents from wet gas. The solvent recovery device is simple and has a high recovery rate. For flammable, explosive, toxic, and easily oxidizable materials, nitrogen can be used as a carrier gas for closed-loop circulation to ensure safe operation. Specially suitable for drying flammable, explosive, and toxic materials.
3. Vacuum type: A disc dryer operated in a vacuum state, particularly suitable for drying heat sensitive materials.

（5） Easy installation and small footprint
1. The dryer is shipped as a whole and only needs to be lifted into place for easy installation and positioning.
2. Due to the layered arrangement and vertical installation of the drying tray, even if the drying area is large, the footprint is also very small.

Technical Characteristics

（1） Drying dish

Adopting sandwich type heat exchange, it can be heated by steam, hot water, and thermal oil. Generally, the sandwich pressure is ≤ 0.4MPa, and high pressure can be customized.

（2） Material conveying system
1. Spindle speed: 1-10 revolutions per minute, electromagnetic or variable frequency stepless speed regulation.
2. Rake arms: There are 2-8 rake arms fixed to the main shaft on each layer of the drying disc.
3. Rake blade: Twisted onto the rake arm, it can float up and down with the disc surface to maintain contact, and has various forms.
4. Rolling: For materials that are prone to clumping and need to be crushed, adding rolling at appropriate positions can enhance heat transfer and drying processes.

（3） Shell
There are three types: atmospheric pressure, sealed, and vacuum
1. Atmospheric pressure type: cylindrical or octagonal, with two types of structures: integral and split. The main pipeline for the inlet and outlet of the heating medium can be located inside or outside the shell.
2. Sealed type: The cylindrical shell can withstand an internal pressure of 5KPa, and the main inlet and outlet pipes of the heating medium can be inside or outside the shell.
3. Vacuum type: cylindrical shell, designed for an external pressure of 0.1MPa, with the main inlet and outlet pipelines of the heating medium inside the shell.

（4） Air heater
Generally used in situations with high evaporation to enhance drying efficiency.

Application

（1） Inorganic chemical products
Lithium hydroxide, nickel hydroxide, zirconium hydroxide, ternary materials, lightweight calcium carbonate, active calcium carbonate, nanoscale ultrafine calcium carbonate, magnesium carbonate, aluminum hydroxide, white gray black, strontium carbonate, barium carbonate, sodium sulfate, potassium carbonate, lithopone, sodium hydrosulfate, barium sulfate, potassium sulfate, microsphere catalysts, magnesium hydroxide, copper sulfate, nickel sulfate, nickelamine, sodium molybdate, sodium chloride, potassium chloride, cryolite, iron oxide red, calcium phosphate, sulfur, etc.

（2） Organic chemical products
Organic chemical raw materials and intermediates such as polyvinyl chloride resin, polytetrafluoroethylene resin, fumaric acid, anthraquinone, nitroanthraquinone, para aminophenol, melamine, cyanuric acid, para aminobenzenesulfonic acid, antioxidant 168, antioxidant 1010, phenol As, stearate, aniline, nitroaniline, dipentaerythritol, chlorinated wax, calcium formate, triethylenediamine, sodium benzenesulfonate, isophthalic acid, sodium dimethyl pentasulfonate, thiourea, oil soluble aniline black dye, acid black dye, etc.

（3） Medicine and food

Amphotericin, Deng salt, L-phenylglycine and intermediates, cefotaxime, ceftriaxone, metamizole, cimetidine, vitamin B12, vitamin C, phenylhydantoin, medicinal salts, medicinal aluminum hydroxide, medicinal magnesium metasilicate, caffeine, tea, flower extract, Ginkgo biloba leaves, chocolate powder, starch, corn germ and other raw materials and pharmaceutical intermediates.

（4） Feed and fertilizer
Potassium carbonate, bio potassium fertilizer, protein feed, feed grade streptomycin, mycelium, bran, distiller's grains, grains, seeds, herbicides, cellulose, feed grade calcium hydrogen phosphate, etc.

Technical Specifications