Line of granulation of chips 1 t/hour, Kharkiv region.

Description
Chip granulation line.
Advantages of pellets from pine wood (other types of wood are also used)

* Pine pellets have a high degree of combustion, low moisture content (less than 10%), longer burning time and high combustion efficiency.
* The ash content is only 0.5% after burning, and the ash can also be used as a fertilizer in your garden or on your farm.
* A small amount of smoke during combustion is environmental protection.
* Using pine pellets for heating is much cheaper than other types of fuel.
* Pine wood pellets are suitable for proper transportation, processing and further use.

Production process of a pellet plant 1 ton per time
Tree trunk grinding→Raw material reception→Sliver grinding→Drying→Crushing→Granulation→Cooling→Packaging
Composition of sawdust granulation line:

Chopping machine - 1 pc.
AVM interrogator - 1 set.
Belt conveyor - 1 pc.
Deck hammer crusher - 1 pc.
Pneumatic transport - 1 set.
Drying complex AVM-0.65 - 1 set.
Cabinet for managing raw materials - 2 pcs.
Sieve hammer crusher - 1 pc.
OGM-1.5 granulation block - 1 set.
OGM granulation unit control cabinet - 1 pc. 170
Система подачи воды в гранулятор ОГМ-1,5 - 1 шт.
Pressinggranulator roller OGM-1.5 - 2 pcs.
The price does not include:

OGM-1.5 granulator matrix (choice of granule diameter and granulated raw material)
Heat generator (TG) of the drying complex AVM-0.65 (choice of stationary heat generator or portable TG)
Additional equipment (optional): noria, hopper, hopper for ready-made pellets,весы for BIG-BEG, packing device for packing pellets from 1 to 50 kg into ready-made containers.

The main equipment related to the plant for the production of wood pellets from sawdust 1 ton per hour

1. Cutting machine

The trunk of the tree must be crushed into chips using a chopping machine - equipment for the production of pine chips of large capacity and good quality. This machine consists of a machine base, a disc with knives, a feed roller and hydraulic pressure system components. The hydraulic log feed mechanism has a built-in ability to adjust the raw material feed rate without reducing power, which allows processing both small branches and large logs without loss of productivity. The chip is ejected under air pressure through the neck.
Chips or sawdust: they are mainly from sawmills. And they can be fed directly with the help of a feeder into the crusher without preliminary splitting.

2. Storage hopper. Questioner of AVM

For the convenience of work, an AVM feeder is used, which can take up to 13 cubic meters. raw materials for operational stock and automatic transportation of chips, sawdust, husks. The unloading takes place on a belt conveyor that moves the raw material to further grinding.

3. Deck hammer crusher.

When the thickness exceeds 10 mm or the size exceeds 50 x 50 mm, a wood chipper is required to grind these materials into finer fractions.

The crusher is designed for grinding wood chips. Chips and shavings must be reduced to particles of the required size before being fed to the drying complex in order to increase the productivity of the entire line as a whole.

4. Pneumatic transport

The raw material from the dekovayacrusher falls into the raw material sludge cyclone. An active cyclone (7.5 kW) supplies fine, crushed raw materials to the drying complex. The cyclone discharges raw materials into the receiving cone of drying with the help of a sluice dispenser (1.5 kW)
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The main components of an active cyclone: ​​a cyclone with a fan, a cyclone cone, a sluice dispenser with a motor-reducer mounted on a subframe.

5. Drying

Raw materials: chips, shavings, sawdust, husks of all types. Humidity up to 65%

Being one of the important and indispensable devices for drying on the production line of sawdust granules, the drum dryer with a rotating drum can dry the moisture content contained in the raw material and makes it optimal for granulation. The ideal humidity for granulation is 10-15%. In this situation, the pellets have better quality and good shape. Drum dryer AVM-0.65 is an important and indispensable drying equipment for the production of wood pellets or briquettes, which can dry high moisture content in sawdust for optimal granulation.

AVM-0.65 drum dryer is characterized by energy saving, high drying intensity, environmental friendliness, high drying capacity, high heating efficiency, etc.

Principle of operation.

In the heat generator, fuel burns and mixes with air in the required proportion. Thus, a drying agent is formed, which is fed into the drying drum.
The raw material is fed into the receiving device of the drying drum by a scraper conveyor or pneumatic conveyor. The feed rate of the raw material into the drum is regulated in such a way that the humidity of the raw material at the exit from the drum is maintained at the set level. In the dryer, the raw material dries to a moisture content of 8-15% and is removed from it by a pneumatic transport cyclone with a built-in fan. In the pneumatic transport cyclone, the dried raw material is separated from the spent drying agent and fed to the consumer through the sluice feeder.
The design of the drum is three-pass, the inner part is made of heat-resistant steel. The dryer is equipped with an inertial ash catcher, which catches large particles carried away from the heat generator.

Variants of the heat generator for the AVM drying complex:

Portable heat generator with fuel supply hopper (chips, sawdust, husk).
A stationary heat generator is laid out in place from fireclay brick.
The total installed capacity of electric motors is 25 kW.

The main components of the AVM-0.65 drying complex: drying pre-furnace, drum with stretchers and drive station, active cyclone, electric cabinet, set of chimney pipes.

6. Crushing sawdust

The crusher is intended for crushing wood chips, sawdust and husk into small fractions.
The size of the particles directly affects the effect of granulation, here a mill is used for grinding sawdust, namely a sieve hammer crusher DZU. For a capacity of 1 t/h, our DZU model with a 30 kW electric motor and a capacity of up to 1200 kg/h is recommended.

The raw material for grinding is sucked into the working area of ​​the crusher through the feed nozzle and crushed with the help of hammers. With continuous impact against the hammers, the sawdust breaks up into small particles of wood until they become small enough to pass through the holes in the sieves of the crusher. Thus, the crushed product passes through the sieve into the discharge opening for further processing (granulation, pressing) or storage.

7. Granulation

Granulation is the main procedure on the sawdust pellet production line. The OGM-1.5 granulator with a ring matrix is ​​designed for the production of granules from crushed raw materials, such as sawdust, husks, grass, straw, dry fodder, soybean husks, rice husks, cottonwood, bird droppings, peat and other loose materials. Usually, the granulator is equipped with a ring matrix with a diameter of 6 mm, 8 mm, since fuel granules with a diameter of 6 mm and 8 mm are more favorable for burning. In addition, ring matrices of other hole diameters can also be made according to the customer's requirements.

Working principle.

The raw material prepared for granulation is fed by a pneumatic system into the storage hopper, from where the raw material is uniformly fed by a dispenser into the mixer of the OGM granulator, where it is moistened with water or steam to the humidity required for granulation and intensively mixed with a stirrer (moisture promotes the formation of durable granules). From the mixer, the moistened raw material is introduced into the press. In the pressing chamber, the raw material is pulled between the rotating die and rollers and pushed into the radial holes of the die, where granules are formed under the action of high pressure. The granules squeezed out of the holes hit the stationary knife and break off. By turning the knife on its axis, you can adjust the length of broken granules. The broken granules fall down and are removed from the press through the casing sleeve. The granules coming out of the press have a high temperature and are fragile, so they are transported by the noria to the cooling column. Here, air is sucked in through the layer of granules by a fan, which cools the granules and at the same time sucks part of the non-granular raw material into the cyclone. During the cooling process, the humidity of the granules decreases due to the evaporation of moisture, and physical and chemical changes occur in the granules. As a result, they acquire the necessary hardness, humidity and temperature. From the cooling column, as it fills, the granules are sent to sorting, where conditioning granules are separated from crumbs.
The granules are discharged through the discharge nozzle, and the crumb is sent to the cyclone and further sent along with the raw material for re-pressing.
Basic data: productivity - up to 1.2 t/h. The productivity of the equipment depends on the granulated material and the selected matrix (compound feed productivity up to 3 tons per hour).

The total installed capacity of electric motors is 105 kW. The binding substance is water.

The main components of the OGM granulation unit: a press with a matrix, a storage hopper, a cooler-sorter, active cyclones, a passive cyclone, a noria, an electrical cabinet, a mixer with a water supply system, a dispenser.

8. Cooling

The granulation block includes the original OGM cooler.

After the granulation process, the granules have a high temperature (80-90 ℃) and humidity (about 16-18%). Therefore, a wood pellet cooler is needed to reduce the temperature of the pellets by approximately 3~5 ℃ above the ambient temperature and reduce the moisture content to 10-13%, which is better for storage. We use international advanced cooling technology, the pellet cooler creates an excellent effect of maintaining the integrity of the pellets in the work process.

IMPORTANT! Made from a copy of the original Lithuanian cooler.

9. System