Product Overview: The PLG series disk dryer is an effective continuous conduction drying equipment. Its unique structure and working principle determine its high thermal efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, and good operating environment. The disk dryer is widely used in drying operations in industries such as chemicals, pharmaceuticals, pesticides, food, feed, and agricultural and sideline products processing. It has received high praise in practical applications across various industries. Currently, it is produced in three types: atmospheric pressure, sealed, and vacuum, with four specifications: 1200, 1500, 2200, and 3000, and models A (carbon steel) and B (stainless steel distributed on the contact material parts).

Drum Dryer Working Principle

Continuous addition of wet material to the upper layer of the dryer, onto the drying tray. A scraper arm with rake blades rotates, continuously flipping the material. The material flows over the surface of the drying tray along an exponential spiral line; the material on the small drying tray is moved to the outer edge, where it falls onto the outer edge of the larger drying tray below. The material on the larger drying tray moves inward and falls through the center discharge opening into the next layer of smaller drying trays. The trays of different sizes are alternately stacked vertically, allowing continuous flow through the entire dryer. Hollow drying trays are supplied with a heating medium, which can be saturated steam, hot water, or thermal oil; the medium enters at one end of the tray and exits at the other. Once dried, the material falls to the bottom of the shell and is finally conveyed to the discharge point by the scraper blades. Moisture evaporates from the material and is expelled through an exhaust port on the lid. The moisture from the vacuum-type tray dryer is extracted through a vacuum pump port on the lid. Dry material discharged from the bottom can be directly packaged. By adding auxiliary equipment such as finned heaters, solvent recovery condensers, bag dust collectors, dry material blending units, induced draft fans, etc., the drying capacity can be increased, making it possible to dry paste-like and heat-sensitive materials, conveniently recover solvents, and perform pyrolysis and reaction operations.

Disk Dryer, primarily used in the following fields:

Drying, Pyrolysis, Roasting, Cooling, Reaction, Sublimation

(1) Organic Chemical Products

Polyethylene resin, polytetrafluoroethylene resin, adipic acid black dye, etc., organic chemical raw materials and intermediates.

(2) Inorganic Chemical Products

Lightweight calcium carbonate, activated calcium carbonate, nano-grade ultra-fine calcium carbonate, magnesium carbonate, aluminum hydroxide, white and black lime, strontium carbonate, barium carbonate, potassium carbonate, lithopone, barium sulfate, potassium sulfate, microspheres catalyst, hydrogen

(Medical Products, Food)

Ampicillin, Dung Salt, L-Phenylalanine and intermediates, Cefamet, Ceftriaxone, Analgin, Cimetidine, B12, Vitamin C, Pharmaceutical Salts, Pharmaceutical Aluminum Hydroxide, Pharmaceutical Magnesium Orthosilicate, Caffeine, Tea, Flower Extracts, Ginkgo Biloba Leaves, Cocoa Powder, Starch, Corn Germ, and other raw materials and pharmaceutical intermediates.

(Four) Feed, Fertilizer

Potassium carbonate, biological potassium fertilizer, protein feed, gold霉素 for feed, mycelium, bran, distiller's grains, grain, seeds, etc.

Disk Dryer Features

(1) Easy to control, versatile

Adjusting the material layer thickness, spindle speed, number of rakes, and rake blade type and size can optimize the drying process.

2. Each drying tray can be individually supplied with either hot or cold medium, allowing for precise heating or cooling of materials, with easy temperature control.

3. Material dwell time can be accurately adjusted.

4. Material flow is single-directional with no contamination, ensuring even drying, stable quality, and no need for blending.

Simple and easy to operate

The operation of starting and stopping the dryer is extremely simple.

2. After stopping the material intake, the scraper blades can quickly empty the material from the dryer.

3. Special large-scale inspection doors and viewports allow for thorough cleaning and observation inside the equipment.

Low energy consumption

The material layer is thin, the spindle speed is low, and the power required for the material conveying system is small, resulting in low energy consumption.

2. Dries through conduction of heat, offering high thermal efficiency and low energy consumption.

(4) Favorable operational environment, recyclable solvents, dust emissions meet requirements

1. Atmospheric Type: Due to the low airflow velocity inside the equipment and the uneven humidity distribution from top to bottom, dust is difficult to rise to the top of the equipment. Therefore, the exhaust gas emitted from the moisture exhaust port at the top contains almost no dust.

2. Sealed Type: Equipped with a solvent recovery unit, which allows for easy recovery of organic solvents from moist gas. The solvent recovery unit is simple, with a high recovery rate. For flammable, explosive, toxic, and easily oxidizable materials, nitrogen can be used as the moist gas for closed-loop circulation, ensuring safe operation. Particularly suitable for drying flammable, explosive, and toxic materials.

3. Vacuum Type: A disc dryer operated under vacuum, especially suitable for drying thermosensitive materials.

(E) Easy to install, with a small land occupation area

1. The dehumidifier is factory-finished and shipped as a whole, requiring only hoisting into place, making installation and alignment extremely easy.

2. Due to the dry disk layer arrangement and vertical installation, even with a large drying area, the footprint is minimal.

Disk Dryer Technical Specifications

(Dry plate)

Design Pressure: Generally 0.4 MPa, up to 1.6 MPa.

2. High pressure: Generally ≤0.4 MPa, up to 1.6 MPa in high pressure conditions.

3. Heating Medium: Steam, hot water, and thermal oil. Use hot water for heating when the drying pan temperature is ≤100℃. Use saturated steam or superheated steam at ≤0.4 MPa for heating between 100℃ and 150℃, and thermal oil for heating between 150℃ and 320℃. For temperatures above 320℃, electric heating, thermal oil, or molten salt heating methods can be used.

Material Conveyance System

1. Spindle Speed: 1-10 RPM, electromagnetic or variable frequency stepless speed control.

2. Rake Arms: Each layer of the drying tray features 2 to 8 rake arms fixed to the main shaft.

3. Rake Blades: Jointed on the rake arm, capable of floating up and down with the disk surface to maintain contact, available in various styles.

4. Crushing: For materials prone to caking or requiring crushing, adding crushing units at appropriate locations can enhance heat transfer and drying processes.

(3) Housing

There are three types: atmospheric pressure, sealed, and vacuum.

1. Atmospheric Type: Available in cylindrical or octagonal prism shapes, with both integral and split structures. The main inlet and outlet pipes for the heating medium can be either inside or outside the shell.

2. Sealed Type: The cylindrical shell can withstand an internal pressure of up to 5Kpa. The main inlet and outlet pipes for the heating medium can be located either inside or outside the shell.

3. Vacuum Type: Cylindrical shell, designed for an external pressure of 0.1 MPa, with the main inlet and outlet piping for the heating medium located inside the shell.