Drum dryer with heat generator

Heat generator

Appointment

The heat generator provides the formation of coolant by burning fuel and mixing combustion products with air.

Characteristic

• The operation of the heat generator is controlled and monitored from the central console. Visual control of the flame combustion and the supply of material to the drum is carried out using inspection eyes.
• The heat generator consists of:
  • from a gas burner (1; supplied separately);
  • air supply systems for coolant formation (2);
  • visual control windows (3);
  • tray for feeding mass into the drum (4).

Drying drum

Appointment

The drying drum is direct-flow, single-pass, designed for active moisture exchange of the material being dried and the coolant.

Characteristic

• In a drum dryer with a heat generator, the raw materials are kept for 5 to 12 hours at a temperature of 30 to 40 degrees (the air is heated using heat generators and pumped into the drum). During the drying process, the grass loses moisture and reaches a humidity of 12-15%.
• During operation, the drum constantly rotates at a speed of up to 7 revolutions per minute, which is changed from the central control panel. The drum is kept from axial displacement by thrust rollers. The material entering the rotating drum is picked up by the blades located inside, rises up, falls off them and is simultaneously transported by the coolant along the drum. The outer surface of the drum is provided with thermal insulation to reduce heat losses. At the end on the dry material exit side there is a hatch for cleaning the drum.

Drum support-drive stations

In the front part of the drum there is a support-thrust station, with a drive that rotates the drying drum and keeps it from moving horizontally.

A support station is installed at the rear of the drum. The drive is controlled and the speed is adjusted from the control cabinet.

The principle of operation

The principle of operation of a drum dryer with a heat generator is to use hot air or gases to evaporate moisture from wet material and then remove the dry product from the drum.

1. The wet material is fed into the loading device, where it is evenly distributed over the surface of the drum.
2. The rotating drum is driven by an electric motor, and the material begins to move along its surface.
3. The heat generator, located in close proximity to the drum, supplies hot air or gas to the inner surface of the drum. This heat is transferred to the wet material, which helps evaporate the moisture.
4. During the drying process, material moves down the drum and into a discharge area where the dry product is removed from the dryer.
5. The exhaust air, containing moisture and small particles of material, passes through the filtration system, where it is cleaned and then released into the atmosphere.

Advantages

1. High efficiency: provide a high degree of drying of raw materials using hot air or gases.
2. Energy savings: Using a heat generator allows you to save on energy costs, since fuel or steam is used to heat air or gases, rather than external energy sources.
3. Simplicity of design: drum dryers have a simple and reliable design, which ensures their durability and stable operation.
4. Process automation: Most drum dryers with heat generators are equipped with automatic monitoring and control systems, which allows you to optimize the drying process and ensure its stability.