Technical Specification for Ф1250×3000 Double Drum Dryer

1. Overall Design Description:

The entire device consists of 5 parts:

1. Cylinder:

The core of a drum scraper dryer is the drum body. If carbon steel or stainless steel plates are used for rolling, it can easily cause deformation of the drum body due to pressure, heat, and welding stress. This may lead to issues such as poor material scraping, severe scratching of the drum body, significantly reduced service life, or even complete drum failure in severe cases. Particularly in double-drum structures or single-drum with auxiliary drum structures, drum deformation can result in uneven gaps between the two drums, leading to uneven material distribution.

This solution uses an alloy cast iron cylinder with a hard chrome-plated surface, ensuring no deformation and high precision. It offers a long service life.

2. Scraper blade and material receiving auger:

The scraper holder adopts an integrated structure, utilizing the lever principle at both ends to press the scraper tightly with a cylinder. The scraper is then adjusted using fine-tuning screws to ensure it remains in close contact with the drum without damaging it. The scraper is made of 4mm 65Mn steel, precision-ground and quenched and tempered. Alternatively, an airbag pressing device can be used to control the scraper.

The receiving auger blade adopts a serrated design, which can break up flaky materials for easier discharge.

3. Transmission System:

A gear transmission form is adopted, equipped with a gear reducer. The motor uses variable frequency speed regulation, with the rotational speed controlled within the range of 0 to 8 rpm.

4. Cloth spreading machine (slurry throwing machine):

The motor drives the eccentric wheel to rotate, causing the slurry pipe to perform a reciprocating motion on the cylinder body, evenly distributing the slurry onto the upper surface of the cylinder. The sizing speed is adjusted by regulating the flow rate through the rotation speed of the feed pump.

5. Control System

The control points include the main engine speed (variable frequency speed regulation), the distribution motor, and the discharge auger.