Hay and straw granulation line up to 800 kg/hour, Kharkiv region.

Description
Hay and straw granulation line.

Hay and straw as raw materials for biomass pellets

In most cases, straw is considered a type of agricultural waste, such as corn straw, rice straw, wheat straw, and cotton straw. This raw material is a problem for farmers, so it would be nice to get rid of this waste. In the past, some farmers preferred to burn them on the ground, but now people are more likely to use them in the best way - using straw to make pellets. Straw pellets are one of the renewable types of fuel and are characterized by a low level of pollution, reduced emissions and economy. The use of straw pellets varies from domestic heating to large-scale industrial production of electricity.

Production process of a straw pellet plant
Receiving raw materials → Grinding → Granulation → Cooling → Packaging
Composition of the hay and straw granulation line:

Table for feeding rolls, bales — 1 pc. 150
Соломорезка. Измельчитель сена и соломы роторный — 1 шт.
Cabinet for managing the raw materials section — 1 pc.
OGM-1.5 granulation block — 1 set.
OGM granulation block control cabinet — 1 pc.
Water supply system to the OGM-1.5 granulator — 1 pc.
Pressinggranulator roller OGM-1.5 — 2 pcs.
The price does not include:

OGM-1.5 granulator matrix (choice of pellet diameter and granulated raw material)
Additional equipment (optional): noria, hopper, storage of finished granules,весы for BIG-BEG, packing device for packing granules from 1 to 50 kg into ready-made containers.
The main equipment related to the plant for the production of straw pellets

1. Serving table

For the convenience of work, a chain conveyor is used, which can accept a roll with a diameter of 1900 mm or a bale weighing up to 500 kg. The feeding table is equipped with a roll unwinding system (unrolling is not used for bales). Thanks to the conveyor, the raw material is metered into the hay chopper.

2. Straw cutter

The biomass shredder is used for grinding hay, straw and crops at a humidity of up to 25% (with humidity above 25%, the productivity of the shredder decreases and, as a result, the productivity of the line as a whole decreases). The shredder is ideally suited for granulation lines for the production of grass pellets, the production of briquettes, pellets (fuel pellets) because the resulting fraction at the exit from the straw cutter is crushed to a uniform size of less than 8 mm and does not require further grinding with an additionalcrusher, and this is a huge saving of electricity in production!

3. Granulation(//tractor-service.com)

Granulation is the main procedure on the production line of pellets from hay, straw, alfalfa, grass flour. The OGM-1.5 granulator with a ring matrix is ​​intended for the production of granules from crushed raw materials, such as wood sawdust, husks, grass, straw, dry fodder, soybean husks, rice husks, cottonwood, bird droppings, peat and other bulk 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.

Principle of work.

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 strong 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 matrix and rollers and pushed into the radial holes of the matrix, 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.
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: straw productivity — up to 800 kg/h. The productivity of the equipment depends on the granulated material and the selected matrix (combined feed productivity up to 3 tons per hour).

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

The main components of the OGM granulation block: 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.

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.

System for packing finished products, (optional)
Packaging of pellets is the last stage in the process of production of granules from sawdust (pellet production), the stage at which the product is packed into a ready-made container.

For convenience, additional equipment is used: a wheelbarrow and a hopper for ready-made pellets, floor scales for BIG-BEG. After sieving, the granules fall into the storage hopper with the help of a noria. Scales are installed for weight control. Packaged products are stored in a closed shop.

It is also possible to install a granule packer in ready-made containers from 3 to 50 kilograms. The granule packaging machine can protect granules from moisture, corrosion and oxidation.

Why choose fuel pellets from straw?

1. Better to burn. Straw pellets have high calorific value, low moisture content and ash content after pressing, which allows for better burning, ensuring high combustion efficiency.
2. Environmental friendliness. Straw granules do not contain carbon, which leads to zero CO2 emissions. Burning straw pellets will return carbon dioxide to the atmosphere for reuse in the next biomass growth.
3. Economic benefit. Agricultural waste such as rice straw, wheat straw and corn straw are used for the production of straw pellets. In addition, ash after burning pellets can also be used as a mineral fertilizer with a high content of elements useful for growing plants.
4. Easy to store and transport. The density of granules is higher than straw, so it can reduce transport costs and become convenient for storage on your site, while providing more energy.